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## 从kubernetes-server-linux-amd64.tar.gz解压后有kubeadm
]# ./kubeadm config images list
W1022 20:06:05.647976 29233 version.go:104] could not fetch a Kubernetes version from the internet: unable to get URL "https://dl.k8s.io/release/stable-1.txt": Get "https://cdn.dl.k8s.io/release/stable-1.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
W1022 20:06:05.648046 29233 version.go:105] falling back to the local client version: v1.28.3
registry.k8s.io/kube-apiserver:v1.28.3
registry.k8s.io/kube-controller-manager:v1.28.3
registry.k8s.io/kube-scheduler:v1.28.3
registry.k8s.io/kube-proxy:v1.28.3
registry.k8s.io/pause:3.9
registry.k8s.io/etcd:3.5.9-0
registry.k8s.io/coredns/coredns:v1.10.1
所有软件均为开源软件,源文件从官方链接或官方镜像链接地址获取。
https://mirrors.tuna.tsinghua.edu.cn/centos/7.9.2009/isos/x86_64/
下载2009或2207其中任何一个版本都可以。
下载:https://mirrors.tuna.tsinghua.edu.cn/centos/7.9.2009/isos/x86_64/CentOS-7-x86_64-Minimal-2009.iso
下载:https://mirrors.tuna.tsinghua.edu.cn/centos/7.9.2009/isos/x86_64/CentOS-7-x86_64-Minimal-2207-02.iso
https://github.com/kubernetes/kubernetes/tree/v1.28.3
下载:https://dl.k8s.io/v1.28.3/kubernetes-server-linux-amd64.tar.gz
https://download.docker.com/linux/static/stable/x86_64
下载:https://download.docker.com/linux/static/stable/x86_64/docker-24.0.6.tgz
https://github.com/Mirantis/cri-dockerd
下载:https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.5/cri-dockerd-0.3.5.amd64.tgz
https://github.com/etcd-io/etcd/
下载:https://github.com/etcd-io/etcd/releases/download/v3.5.9/etcd-v3.5.9-linux-amd64.tar.gz
https://github.com/cloudflare/cfssl/releases
下载:https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssljson_1.6.4_linux_amd64
下载:https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssl_1.6.4_linux_amd64
下载:https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssl-certinfo_1.6.4_linux_amd64
https://github.com/flannel-io/flannel
下载:https://github.com/flannel-io/flannel/releases/download/v0.22.3/flanneld-amd64
下载:https://github.com/flannel-io/flannel/releases/download/v0.22.3/flannel-v0.22.3-linux-amd64.tar.gz
下载:https://github.com/containernetworking/plugins/releases/download/v1.2.0/cni-plugins-linux-amd64-v1.2.0.tgz
下载:https://github.com/flannel-io/cni-plugin/releases/download/v1.2.0/cni-plugin-flannel-linux-amd64-v1.2.0.tgz
http://nginx.org/en/download.html
下载:http://nginx.org/download/nginx-1.24.0.tar.gz
Hostname | Host IP | Host IP | Role |
---|---|---|---|
k8s1.28.3-1 | 192.168.26.51 | 10.26.51.1/24 | master&worker、etcd、docker、flannel |
k8s1.28.3-2 | 192.168.26.52 | 10.26.52.1/24 | master&worker、etcd、docker、flannel |
k8s1.28.3-3 | 192.168.26.53 | 10.26.53.1/24 | master&worker、etcd、docker、flannel |
[root@vm51 ~]# hostname ## 修改:# hostnamectl set-hostname k8s-51
k8s-51
src]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.26.51 k8s1.28.3-1 vm51 etcd_node1 k8s-51
192.168.26.52 k8s1.28.3-2 vm52 etcd_node2 k8s-52
192.168.26.53 k8s1.28.3-3 vm53 etcd_node3 k8s-53
~]# systemctl disable --now firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
~]# firewall-cmd --state
not running
~]# sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
~]# reboot
~]# sestatus
SELinux status: disabled
修改SELinux配置需要重启操作系统。
~]# sed -ri 's/.*swap.*/#&/' /etc/fstab
~]# swapoff -a && sysctl -w vm.swappiness=0
~]# cat /etc/fstab
#UUID=2ee3ecc4-e9e9-47c5-9afe-7b7b46fd6bab swap swap defaults 0 0
~]# free -m
total used free shared buff/cache available
Mem: 3770 171 3460 19 138 3402
Swap: 0 0 0
~]# ulimit -SHn 65535
~]# cat << EOF >> /etc/security/limits.conf
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
EOF
获取离线安装rpm包,参考:附:安装ipvs工具
~]# yum install ipvsadm ipset sysstat conntrack libseccomp -y ... ~]# cat >> /etc/modules-load.d/ipvs.conf <<EOF ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh nf_conntrack ip_tables ip_set xt_set ipt_set ipt_rpfilter ipt_REJECT ipip EOF ~]# systemctl restart systemd-modules-load.service ~]# lsmod | grep -e ip_vs -e nf_conntrack ip_vs_sh 12688 0 ip_vs_wrr 12697 0 ip_vs_rr 12600 4 ip_vs 145458 10 ip_vs_rr,ip_vs_sh,ip_vs_wrr nf_conntrack_ipv6 18935 3 nf_defrag_ipv6 35104 1 nf_conntrack_ipv6 nf_conntrack_netlink 40492 0 nf_conntrack_ipv4 19149 5 nf_defrag_ipv4 12729 1 nf_conntrack_ipv4 nf_conntrack 143360 10 ip_vs,nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,nf_nat_masquerade_ipv4,nf_nat_masquerade_ipv6,nf_conntrack_netlink,nf_conntrack_ipv4,nf_conntrack_ipv6 libcrc32c 12644 4 xfs,ip_vs,nf_nat,nf_conntrack
临时加载模块
~]# modprobe overlay
~]# modprobe br_netfilter
永久性加载模块
~]# cat > /etc/modules-load.d/containerd.conf << EOF
overlay
br_netfilter
EOF
设置为开机启动
~]# systemctl restart systemd-modules-load.service ##systemctl enable --now systemd-modules-load.service
~]# cat <<EOF > /etc/sysctl.d/k8s.conf net.ipv4.ip_forward = 1 net.bridge.bridge-nf-call-iptables = 1 net.bridge.bridge-nf-call-ip6tables = 1 fs.may_detach_mounts = 1 vm.overcommit_memory=1 vm.panic_on_oom=0 fs.inotify.max_user_watches=89100 fs.file-max=52706963 fs.nr_open=52706963 net.netfilter.nf_conntrack_max=2310720 net.ipv4.tcp_keepalive_time = 600 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.tcp_keepalive_intvl =15 net.ipv4.tcp_max_tw_buckets = 36000 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_max_orphans = 327680 net.ipv4.tcp_orphan_retries = 3 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.ip_conntrack_max = 131072 net.ipv4.tcp_max_syn_backlog = 16384 net.ipv4.tcp_timestamps = 0 net.core.somaxconn = 16384 EOF
~]# sysctl --system
所有节点配置完内核后,重启服务器,保证重启后内核依旧加载
~]# reboot -h now
重启后查看ipvs模块加载情况:
~]# lsmod | grep --color=auto -e ip_vs -e nf_conntrack
重启后查看containerd相关模块加载情况:
~]# lsmod | egrep 'br_netfilter | overlay'
略
]# mkdir -p /opt/{app,cfg,cert,bin}
网络名称 | 网段 | 备注 |
---|---|---|
Node网络 | 192.168.26.0/24 | Node IP,Node节点的IP地址,即物理机(宿主机)的网卡地址。 |
Service网络 | 10.168.0.0/16 | Cluster IP,也可叫Service IP,Service的IP地址。service-cluster-ip-range定义Service IP地址范围的参数。 |
Pod网络 | 10.26.0.0/16 | Pod IP,Pod的IP地址,容器(docker0)网桥分配的地址。cluster-cidr定义Pod网络CIDR地址范围的参数。 |
配置:
apiserver:
--service-cluster-ip-range 10.168.0.0/16 ##Service网络 10.168.0.0/16
controller:
--cluster-cidr 10.26.0.0/16 ##Pod网络 10.26.0.0/16
--service-cluster-ip-range 10.168.0.0/16 ##ervice网络 10.168.0.0/16
kubelet:
--cluster-dns 10.168.0.2 ## 解析Service,10.168.0.2
proxy:
--cluster-cidr 10.26.0.0/16 ##Pod网络 10.26.0.0/16
类型 | 名称 | 下载链接 | 说明 |
---|---|---|---|
资源 | coredns.yaml.base | https://github.com/kubernetes/kubernetes/blob/v1.27.6/cluster/addons/dns/coredns/coredns.yaml.base | 部署 |
资源 | recommended.yaml | https://github.com/kubernetes/dashboard/blob/v2.7.0/aio/deploy/recommended.yaml | 部署 |
资源 | components.yaml(metrics server) | https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.4/components.yaml | 部署 |
镜像 | metrics-server:v0.6.4 | registry.aliyuncs.com/google_containers/metrics-server:v0.6.4 | 部署 |
镜像 | coredns:v1.10.1 | registry.aliyuncs.com/google_containers/coredns:v1.10.1 | 部署 |
镜像 | dashboard:v2.7.0 | kubernetesui/dashboard:v2.7.0 | 部署 |
镜像 | metrics-scraper:v1.0.8 | kubernetesui/metrics-scraper:v1.0.8 | 部署 |
镜像 | pause:3.9 | registry.aliyuncs.com/google_containers/pause:3.9 | 部署 |
app]# mv cfssl_1.6.4_linux_amd64 /usr/local/bin/cfssl
app]# mv cfssl-certinfo_1.6.4_linux_amd64 /usr/local/bin/cfssl-certinfo
app]# mv cfssljson_1.6.4_linux_amd64 /usr/local/bin/cfssljson
app]# chmod +x /usr/local/bin/cfssl*
app]# cfssl version
Version: 1.6.4
Runtime: go1.18
~]# cd /opt/app/
app]# tar zxvf docker-24.0.6.tgz
app]# mv docker /opt/bin/docker-24.0.6
app]# ls /opt/bin/docker-24.0.6
containerd containerd-shim-runc-v2 ctr docker dockerd docker-init docker-proxy runc
app]# ln -s /opt/bin/docker-24.0.6/containerd /usr/bin/containerd
app]# ln -s /opt/bin/docker-24.0.6/containerd-shim-runc-v2 /usr/bin/containerd-shim-runc-v2
app]# ln -s /opt/bin/docker-24.0.6/ctr /usr/bin/ctr
app]# ln -s /opt/bin/docker-24.0.6/docker /usr/bin/docker
app]# ln -s /opt/bin/docker-24.0.6/dockerd /usr/bin/dockerd
app]# ln -s /opt/bin/docker-24.0.6/docker-init /usr/bin/docker-init
app]# ln -s /opt/bin/docker-24.0.6/docker-proxy /usr/bin/docker-proxy
app]# ln -s /opt/bin/docker-24.0.6/runc /usr/bin/runc
app]# docker -v
Docker version 24.0.6, build ed223bc
## 复制到k8s-51、k8s-52
app]# scp -r /opt/bin/docker-24.0.6/ root@k8s-51:/opt/bin/.
app]# scp -r /opt/bin/docker-24.0.6/ root@k8s-52:/opt/bin/.
## 在k8s-51、k8s-52创建软连接:同上
]# mkdir -p /data/docker /etc/docker ## k8s-51 ]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.51.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true } ## k8s-52 ]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.52.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true } ## k8s-53 ]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.53.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true }
]# cat /usr/lib/systemd/system/docker.service [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.service Wants=network-online.target [Service] Type=notify ExecStart=/usr/bin/dockerd ExecReload=/bin/kill -s HUP $MAINPID LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity TimeoutStartSec=0 Delegate=yes KillMode=process Restart=on-failure StartLimitBurst=3 StartLimitInterval=60s [Install] WantedBy=multi-user.target
]# systemctl daemon-reload
]# systemctl start docker; systemctl enable docker
app]# docker info Client: Version: 24.0.6 Context: default Debug Mode: false Server: Containers: 0 Running: 0 Paused: 0 Stopped: 0 Images: 0 Server Version: 24.0.6 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Using metacopy: false Native Overlay Diff: true userxattr: false Logging Driver: json-file Cgroup Driver: systemd Cgroup Version: 1 Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: io.containerd.runc.v2 runc Default Runtime: runc Init Binary: docker-init containerd version: 7880925980b188f4c97b462f709d0db8e8962aff runc version: v1.1.9-0-gccaecfc init version: de40ad0 Security Options: seccomp Profile: builtin Kernel Version: 3.10.0-1160.90.1.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 2 Total Memory: 3.682GiB Name: k8s-53 ID: 8467715c-5b8b-4086-b703-4017ddf38e12 Docker Root Dir: /data/docker Debug Mode: false Experimental: false Insecure Registries: harbor.oss.com:32310 127.0.0.0/8 Registry Mirrors: https://5gce61mx.mirror.aliyuncs.com/ Live Restore Enabled: true Product License: Community Engine
app]# docker version Client: Version: 24.0.6 API version: 1.43 Go version: go1.20.7 Git commit: ed223bc Built: Mon Sep 4 12:30:51 2023 OS/Arch: linux/amd64 Context: default Server: Docker Engine - Community Engine: Version: 24.0.6 API version: 1.43 (minimum version 1.12) Go version: go1.20.7 Git commit: 1a79695 Built: Mon Sep 4 12:32:17 2023 OS/Arch: linux/amd64 Experimental: false containerd: Version: v1.7.3 GitCommit: 7880925980b188f4c97b462f709d0db8e8962aff runc: Version: 1.1.9 GitCommit: v1.1.9-0-gccaecfc docker-init: Version: 0.19.0 GitCommit: de40ad0
app]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:c6:99:5e brd ff:ff:ff:ff:ff:ff inet 192.168.26.51/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fec6:995e/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:43:aa:de:72 brd ff:ff:ff:ff:ff:ff inet 10.26.51.1/24 brd 10.26.51.255 scope global docker0 valid_lft forever preferred_lft forever
在k8s-53:
k8s-53 app]# docker pull centos ... app]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos latest 5d0da3dc9764 2 years ago 231MB k8s-53 app]# docker run -i -t --name test centos /bin/bash [root@e179e0701ccc /]# ip a [root@3add8e00e63b /]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 4: eth0@if5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:0a:1a:35:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 10.26.53.2/24 brd 10.26.53.255 scope global eth0 valid_lft forever preferred_lft forever k8s-53 app]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3add8e00e63b centos "/bin/bash" 47 seconds ago Exited (127) 4 seconds ago test k8s-53 app]# docker rm test
为什么要安装cri-dockerd插件?
K8s在刚开源时没有自己的容器引擎,而当时docker非常火爆是容器的代表,所以就在kubelet的代码里集成了对接docker的代码——docker shim,所以1.24版本之前是默认使用docker,不需要安装cri-dockerd。
K8s 1.24版本移除 docker-shim的代码,而 Docker Engine 默认又不支持CRI标准,因此二者默认无法再直接集成。为此,Mirantis 和 Docker 为了Docker Engine 提供一个能够支持到CRI规范的桥梁,就联合创建了cri-dockerd,从而能够让 Docker 作为K8s 容器引擎。
截至目前2023年10月20日,k8s已经更新至1.28.3版。从v1.24起,Docker不能直接作为k8s的容器运行时,因为在k8s v1.24版本移除了叫dockershim的组件,这是由k8s团队直接维护而非Docker团队维护的组件,这意味着Docker和k8s的关系不再像原来那般亲密,开发者需要使用其它符合CRI(容器运行时接口)的容器运行时工具(如containerd, CRI-O等),当然这并不意味着新版本的k8s彻底抛弃Docker(由于Docker庞大的生态和广泛的群众基础,显然这并不容易办到),在原本安装了Docker的基础上,可以通过补充安装cri-dockerd,以满足容器运行时接口的条件,从某种程度上说,cri-dockerd就是翻版的dockershim。
k8s-53 app]# tar -zxvf cri-dockerd-0.3.5.amd64.tgz
k8s-53 app]# mv cri-dockerd /opt/bin/cri-dockerd-0.3.5
k8s-53 app]# ll /opt/bin/cri-dockerd-0.3.5
总用量 41568
-rwxrwxr-x 1 1000 1000 42565632 10月 17 05:49 cri-dockerd
k8s-53 app]# ln -s /opt/bin/cri-dockerd-0.3.5/cri-dockerd /usr/local/bin/cri-dockerd
k8s-53 app]# cri-dockerd --version
cri-dockerd 0.3.5 (cd730ff8)
复制:
k8s-53 app]# scp -r /opt/bin/cri-dockerd-0.3.5 root@k8s-51:/opt/bin/.
k8s-53 app]# scp -r /opt/bin/cri-dockerd-0.3.5 root@k8s-52:/opt/bin/.
创建软链接:同上
]# cat /usr/lib/systemd/system/cri-dockerd.service [Unit] Description=CRI Interface for Docker Application Container Engine Documentation=https://docs.mirantis.com After=network-online.target firewalld.service docker.service Wants=network-online.target Requires=cri-docker.socket ## 如果启动报错,则注释掉这一行 [Service] Type=notify ExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9 ExecReload=/bin/kill -s HUP $MAINPID TimeoutSec=0 RestartSec=2 Restart=always # Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229. # Both the old, and new location are accepted by systemd 229 and up, so using the old location # to make them work for either version of systemd. StartLimitBurst=3 # Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230. # Both the old, and new name are accepted by systemd 230 and up, so using the old name to make # this option work for either version of systemd. StartLimitInterval=60s # Having non-zero Limit*s causes performance problems due to accounting overhead # in the kernel. We recommend using cgroups to do container-local accounting. LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity # Comment TasksMax if your systemd version does not support it. # Only systemd 226 and above support this option. TasksMax=infinity Delegate=yes KillMode=process [Install] WantedBy=multi-user.target
]# systemctl daemon-reload
]# systemctl enable cri-dockerd && systemctl start cri-dockerd
]# systemctl status cri-dockerd
● cri-dockerd.service - CRI Interface for Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/cri-dockerd.service; disabled; vendor preset: disabled)
Active: active (running) since 五 2023-10-20 16:11:13 CST; 7s ago
...
在k8s-53上/opt/cert目录下创建,然后分发。
cert]# cat > ca-csr.json << EOF { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "Kubernetes", "OU": "Kubernetes-manual" } ], "ca": { "expiry": "876000h" } } EOF
cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca
cert]# ls ca*pem
ca-key.pem ca.pem
cat > ca-config.json << EOF { "signing": { "default": { "expiry": "876000h" }, "profiles": { "kubernetes": { "usages": [ "signing", "key encipherment", "server auth", "client auth" ], "expiry": "876000h" } } } } EOF
cat > etcd-ca-csr.json << EOF { "CN": "etcd", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "etcd", "OU": "Etcd Security" } ], "ca": { "expiry": "876000h" } } EOF
cat > etcd-csr.json << EOF { "CN": "etcd", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "etcd", "OU": "Etcd Security" } ] } EOF
cert]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare etcd-ca
cert]# ls etcd-ca*pem
etcd-ca-key.pem etcd-ca.pem
cert]# cfssl gencert \
-ca=./etcd-ca.pem \
-ca-key=./etcd-ca-key.pem \
-config=./ca-config.json \
-hostname=127.0.0.1,k8s-51,k8s-52,k8s-53,192.168.26.51,192.168.26.52,192.168.26.53 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare ./etcd
cert]# ls etcd*pem
etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem
cat > apiserver-csr.json << EOF { "CN": "kube-apiserver", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "Kubernetes", "OU": "Kubernetes-manual" } ] } EOF
cert]# cfssl gencert \
-ca=./ca.pem \
-ca-key=./ca-key.pem \
-config=./ca-config.json \
-hostname=127.0.0.1,k8s-51,k8s-52,k8s-53,192.168.26.51,192.168.26.52,192.168.26.53,10.168.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local \
-profile=kubernetes apiserver-csr.json | cfssljson -bare ./apiserver
cert]# ls apiserver*pem
apiserver-key.pem apiserver.pem
cat > front-proxy-ca-csr.json << EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"ca": {
"expiry": "876000h"
}
}
EOF
cat > front-proxy-client-csr.json << EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
## 生成kube-apiserver聚合证书
cert]# cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare ./front-proxy-ca
cert]# ls front-proxy-ca*pem
front-proxy-ca-key.pem front-proxy-ca.pem
cert]# cfssl gencert \
-ca=./front-proxy-ca.pem \
-ca-key=./front-proxy-ca-key.pem \
-config=./ca-config.json \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare ./front-proxy-client
cert]# ls front-proxy-client*pem
front-proxy-client-key.pem front-proxy-client.pem
cat > manager-csr.json << EOF { "CN": "system:kube-controller-manager", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "system:kube-controller-manager", "OU": "Kubernetes-manual" } ] } EOF
cert]# cfssl gencert \
-ca=./ca.pem \
-ca-key=./ca-key.pem \
-config=./ca-config.json \
-profile=kubernetes \
manager-csr.json | cfssljson -bare ./controller-manager
cert]# ls controller-manager*pem
controller-manager-key.pem controller-manager.pem
cat > admin-csr.json << EOF { "CN": "admin", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "system:masters", "OU": "Kubernetes-manual" } ] } EOF
cert]# cfssl gencert \
-ca=./ca.pem \
-ca-key=./ca-key.pem \
-config=./ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare ./admin
cert]# ls admin*pem
admin-key.pem admin.pem
cat > scheduler-csr.json << EOF { "CN": "system:kube-scheduler", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "system:kube-scheduler", "OU": "Kubernetes-manual" } ] } EOF
cert]# cfssl gencert \
-ca=./ca.pem \
-ca-key=./ca-key.pem \
-config=./ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare ./scheduler
cert]# ls scheduler*pem
scheduler-key.pem scheduler.pem
cat > kube-proxy-csr.json << EOF { "CN": "system:kube-proxy", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "Beijing", "L": "Beijing", "O": "system:kube-proxy", "OU": "Kubernetes-manual" } ] } EOF
cert]# cfssl gencert \
-ca=./ca.pem \
-ca-key=./ca-key.pem \
-config=./ca-config.json \
-profile=kubernetes \
kube-proxy-csr.json | cfssljson -bare ./kube-proxy
cert]# ls kube-proxy*pem
kube-proxy-key.pem kube-proxy.pem
cert]# openssl genrsa -out /opt/cert/sa.key 2048
cert]# openssl rsa -in /opt/cert/sa.key -pubout -out /opt/cert/sa.pub
cert]# ls /opt/cert/sa*
/opt/cert/sa.key /opt/cert/sa.pub
cert]# scp /opt/cert/* root@k8s-51:/opt/cert/.
cert]# scp /opt/cert/* root@k8s-52:/opt/cert/.
## 解压软件包,并将运行软件放到/opt/bin目录 k8s-53 app]# tar -xf etcd-v3.5.9-linux-amd64.tar.gz -C /opt/bin k8s-53 app]# ls /opt/bin/etcd-v3.5.9-linux-amd64/ -l 总用量 52408 drwxr-xr-x 3 528287 89939 40 5月 11 19:40 Documentation -rwxr-xr-x 1 528287 89939 22474752 5月 11 19:40 etcd -rwxr-xr-x 1 528287 89939 16998400 5月 11 19:40 etcdctl -rwxr-xr-x 1 528287 89939 14118912 5月 11 19:40 etcdutl -rw-r--r-- 1 528287 89939 42066 5月 11 19:40 README-etcdctl.md -rw-r--r-- 1 528287 89939 7359 5月 11 19:40 README-etcdutl.md -rw-r--r-- 1 528287 89939 9394 5月 11 19:40 README.md -rw-r--r-- 1 528287 89939 7896 5月 11 19:40 READMEv2-etcdctl.md k8s-53 app]# ln -s /opt/bin/etcd-v3.5.9-linux-amd64/etcdctl /usr/local/bin/etcdctl k8s-53 app]# ln -s /opt/bin/etcd-v3.5.9-linux-amd64/etcd /opt/bin/etcd k8s-53 app]# etcdctl version etcdctl version: 3.5.
## 复制软件到其他节点
]# scp -r /opt/bin/etcd-v3.5.9-linux-amd64/ root@k8s-51:/opt/bin/
]# scp -r /opt/bin/etcd-v3.5.9-linux-amd64/ root@k8s-52:/opt/bin/
## 在其他节点创建软链接
]# ln -s /opt/bin/etcd-v3.5.9-linux-amd64/etcdctl /usr/local/bin/etcdctl
]# ln -s /opt/bin/etcd-v3.5.9-linux-amd64/etcd /opt/bin/etcd
cat > /opt/cfg/etcd.config.yml << EOF name: 'k8s-51' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://192.168.26.51:2380' listen-client-urls: 'https://192.168.26.51:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://192.168.26.51:2380' advertise-client-urls: 'https://192.168.26.51:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-51=https://192.168.26.51:2380,k8s-52=https://192.168.26.52:2380,k8s-53=https://192.168.26.53:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
etcd启动参数配置文件没有enable-v2: true
时,etcd默认为v3,命令行中可以不加ETCDCTL_API=3
cat > /opt/cfg/etcd.config.yml << EOF name: 'k8s-52' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://192.168.26.52:2380' listen-client-urls: 'https://192.168.26.52:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://192.168.26.52:2380' advertise-client-urls: 'https://192.168.26.52:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-51=https://192.168.26.51:2380,k8s-52=https://192.168.26.52:2380,k8s-53=https://192.168.26.53:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
cat > /opt/cfg/etcd.config.yml << EOF name: 'k8s-53' data-dir: /var/lib/etcd wal-dir: /var/lib/etcd/wal snapshot-count: 5000 heartbeat-interval: 100 election-timeout: 1000 quota-backend-bytes: 0 listen-peer-urls: 'https://192.168.26.53:2380' listen-client-urls: 'https://192.168.26.53:2379,http://127.0.0.1:2379' max-snapshots: 3 max-wals: 5 cors: initial-advertise-peer-urls: 'https://192.168.26.53:2380' advertise-client-urls: 'https://192.168.26.53:2379' discovery: discovery-fallback: 'proxy' discovery-proxy: discovery-srv: initial-cluster: 'k8s-51=https://192.168.26.51:2380,k8s-52=https://192.168.26.52:2380,k8s-53=https://192.168.26.53:2380' initial-cluster-token: 'etcd-k8s-cluster' initial-cluster-state: 'new' strict-reconfig-check: false enable-pprof: true proxy: 'off' proxy-failure-wait: 5000 proxy-refresh-interval: 30000 proxy-dial-timeout: 1000 proxy-write-timeout: 5000 proxy-read-timeout: 0 client-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true peer-transport-security: cert-file: '/opt/cert/etcd.pem' key-file: '/opt/cert/etcd-key.pem' peer-client-cert-auth: true trusted-ca-file: '/opt/cert/etcd-ca.pem' auto-tls: true debug: false log-package-levels: log-outputs: [default] force-new-cluster: false EOF
在edcd节点k8s-51、k8s-52、k8s-53
cat > /usr/lib/systemd/system/etcd.service << EOF [Unit] Description=Etcd Service Documentation=https://coreos.com/etcd/docs/latest/ After=network.target [Service] Type=notify ExecStart=/opt/bin/etcd --config-file=/opt/cfg/etcd.config.yml Restart=on-failure RestartSec=10 LimitNOFILE=65536 [Install] WantedBy=multi-user.target Alias=etcd3.service EOF
启动,检查
]# systemctl daemon-reload
]# systemctl enable --now etcd
]# systemctl status etcd
● etcd.service - Etcd Service
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since 六 2023-10-21 07:59:54 CST; 24s ago
Docs: https://coreos.com/etcd/docs/latest/
Main PID: 1564 (etcd)
Tasks: 8
Memory: 26.4M
CGroup: /system.slice/etcd.service
└─1564 /opt/bin/etcd --config-file=/opt/cfg/etcd.config.yml
...
## 默认:ETCDCTL_API=3 ]# etcdctl --endpoints="192.168.26.51:2379,192.168.26.52:2379,192.168.26.53:2379" \ --cacert=/opt/cert/etcd-ca.pem --cert=/opt/cert/etcd.pem --key=/opt/cert/etcd-key.pem endpoint health --write-out=table +--------------------+--------+-------------+-------+ | 192.168.26.51:2379 | true | 10.751752ms | | | 192.168.26.53:2379 | true | 11.157143ms | | | 192.168.26.52:2379 | true | 29.083563ms | | +--------------------+--------+-------------+-------+ ]# etcdctl --endpoints="192.168.26.51:2379,192.168.26.52:2379,192.168.26.53:2379" \ --cacert=/opt/cert/etcd-ca.pem --cert=/opt/cert/etcd.pem --key=/opt/cert/etcd-key.pem endpoint status --write-out=table +--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | 192.168.26.51:2379 | f0355985a6ae32e9 | 3.5.9 | 29 kB | true | false | 2 | 11 | 11 | | | 192.168.26.52:2379 | 675c2a43b7236ee3 | 3.5.9 | 20 kB | false | false | 2 | 11 | 11 | | | 192.168.26.53:2379 | 1bd9fbe011426d48 | 3.5.9 | 20 kB | false | false | 2 | 11 | 11 | | +--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ ]# etcdctl --endpoints="192.168.26.51:2379,192.168.26.52:2379,192.168.26.53:2379" \ --cacert=/opt/cert/etcd-ca.pem --cert=/opt/cert/etcd.pem --key=/opt/cert/etcd-key.pem member list --write-out=table +------------------+---------+--------+----------------------------+----------------------------+------------+ | ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER | +------------------+---------+--------+----------------------------+----------------------------+------------+ | 1bd9fbe011426d48 | started | k8s-53 | https://192.168.26.53:2380 | https://192.168.26.53:2379 | false | | 675c2a43b7236ee3 | started | k8s-52 | https://192.168.26.52:2380 | https://192.168.26.52:2379 | false | | f0355985a6ae32e9 | started | k8s-51 | https://192.168.26.51:2380 | https://192.168.26.51:2379 | false | +------------------+---------+--------+----------------------------+----------------------------+------------+
官方参考:
参见etcd部分。
k8s-51: ]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32 10.26.51.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0 192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32 k8s-52: ]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32 10.26.52.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0 192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32 k8s-53: ]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32 10.26.53.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0 192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
清除其它路由,如:route del -net 10.26.57.0 netmask 255.255.255.0 gw 192.168.26.53
~]# etcdctl --endpoints="192.168.26.51:2379,192.168.26.52:2379,192.168.26.53:2379" \
--cacert=/opt/cert/etcd-ca.pem --cert=/opt/cert/etcd.pem --key=/opt/cert/etcd-key.pem \
put /coreos.com/network/config '{"Network": "10.26.0.0/16", "Backend": {"Type": "vxlan"}}'
~]# etcdctl --endpoints="192.168.26.51:2379,192.168.26.52:2379,192.168.26.53:2379" \
--cacert=/opt/cert/etcd-ca.pem --cert=/opt/cert/etcd.pem --key=/opt/cert/etcd-key.pem get /coreos.com/network/config
/coreos.com/network/config
{"Network": "10.26.0.0/16", "Backend": {"Type": "vxlan"}}
k8s-53:
]# cd /opt/app
k8s-53 app]# mkdir /opt/bin/flannel-v0.22.3-linux-amd64
k8s-53 app]# tar zxvf flannel-v0.22.3-linux-amd64.tar.gz -C /opt/bin/flannel-v0.22.3-linux-amd64
flanneld
mk-docker-opts.sh
README.md
k8s-53 app]# scp -r /opt/bin/flannel-v0.22.3-linux-amd64 root@k8s-51:/opt/bin/.
k8s-53 app]# scp -r /opt/bin/flannel-v0.22.3-linux-amd64 root@k8s-52:/opt/bin/.
## 创建软连接
]# ln -s /opt/bin/flannel-v0.22.3-linux-amd64/flanneld /opt/bin/flanneld
k8s-51:--public-ip=192.168.26.51
;k8s-52:--public-ip=192.168.26.52
;k8s-53:--public-ip=192.168.26.53
cat > /opt/cfg/kube-flanneld.conf << EOF
KUBE_FLANNELD_OPTS="--public-ip=192.168.26.51 \\
--etcd-endpoints=https://192.168.26.51:2379,https://192.168.26.52:2379,https://192.168.26.53:2379 \\
--etcd-keyfile=/opt/cert/etcd-key.pem \\
--etcd-certfile=/opt/cert/etcd.pem \\
--etcd-cafile=/opt/cert/etcd-ca.pem \\
--kube-subnet-mgr=false \\
--iface=ens32 \\
--iptables-resync=5 \\
--subnet-file=/run/flannel/subnet.env \\
--healthz-port=2401"
EOF
cat > /usr/lib/systemd/system/kube-flanneld.service << EOF [Unit] Description=Kubernetes flanneld Documentation=https://github.com/coreos/flannel After=network.target Before=docker.service [Service] EnvironmentFile=/opt/cfg/kube-flanneld.conf ## ExecStartPost=/usr/bin/mk-docker-opts.sh 这一行注释掉 ExecStart=/opt/bin/flanneld \$KUBE_FLANNELD_OPTS Restart=on-failure Type=notify LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF
]# systemctl daemon-reload && systemctl start kube-flanneld && systemctl enable kube-flanneld
]# systemctl status kube-flanneld
● kube-flanneld.service - Kubernetes flanneld
Loaded: loaded (/usr/lib/systemd/system/kube-flanneld.service; disabled; vendor preset: disabled)
Active: active (running) since 六 2023-10-21 08:44:01 CST; 19s ago
...
查看生成的/run/flannel/subnet.env
]# cat /run/flannel/subnet.env
FLANNEL_NETWORK=10.26.0.0/16
FLANNEL_SUBNET=10.26.25.1/24
FLANNEL_MTU=1450
FLANNEL_IPMASQ=false
k8s-51 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:c6:99:5e brd ff:ff:ff:ff:ff:ff inet 192.168.26.51/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fec6:995e/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:9b:c4:eb:d4 brd ff:ff:ff:ff:ff:ff inet 10.26.51.1/24 brd 10.26.51.255 scope global docker0 valid_lft forever preferred_lft forever 4: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether d6:f5:01:c5:16:88 brd ff:ff:ff:ff:ff:ff inet 10.26.6.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::d4f5:1ff:fec5:1688/64 scope link valid_lft forever preferred_lft forever k8s-52 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:0d:04:bf brd ff:ff:ff:ff:ff:ff inet 192.168.26.52/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe0d:4bf/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:17:74:7a:4f brd ff:ff:ff:ff:ff:ff inet 10.26.52.1/24 brd 10.26.52.255 scope global docker0 valid_lft forever preferred_lft forever 4: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether 2a:86:94:58:85:c4 brd ff:ff:ff:ff:ff:ff inet 10.26.75.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::2886:94ff:fe58:85c4/64 scope link valid_lft forever preferred_lft forever k8s-53 app]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:24:1d:cf brd ff:ff:ff:ff:ff:ff inet 192.168.26.53/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe24:1dcf/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:82:02:5d:d5 brd ff:ff:ff:ff:ff:ff inet 10.26.53.1/24 brd 10.26.53.255 scope global docker0 valid_lft forever preferred_lft forever 4: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether 36:96:d4:5a:3a:71 brd ff:ff:ff:ff:ff:ff inet 10.26.25.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::3496:d4ff:fe5a:3a71/64 scope link valid_lft forever preferred_lft forever
k8s-51 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32
10.26.25.0 10.26.25.0 255.255.255.0 UG 0 0 0 flannel.1
10.26.51.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
10.26.75.0 10.26.75.0 255.255.255.0 UG 0 0 0 flannel.1
192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
k8s-52 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32
10.26.6.0 10.26.6.0 255.255.255.0 UG 0 0 0 flannel.1
10.26.25.0 10.26.25.0 255.255.255.0 UG 0 0 0 flannel.1
10.26.52.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
k8s-53 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32
10.26.6.0 10.26.6.0 255.255.255.0 UG 0 0 0 flannel.1
10.26.53.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0
10.26.75.0 10.26.75.0 255.255.255.0 UG 0 0 0 flannel.1
192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32
修改/etc/docker/daemon.json,重启docker
k8s-53 ~]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.25.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true } k8s-53 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:24:1d:cf brd ff:ff:ff:ff:ff:ff inet 192.168.26.53/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe24:1dcf/64 scope link valid_lft forever preferred_lft forever 3: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether 76:3e:f4:2d:6a:59 brd ff:ff:ff:ff:ff:ff inet 10.26.25.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::743e:f4ff:fe2d:6a59/64 scope link valid_lft forever preferred_lft forever 4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:a3:cb:ee:74 brd ff:ff:ff:ff:ff:ff inet 10.26.25.1/24 brd 10.26.25.255 scope global docker0 valid_lft forever preferred_lft forever
k8s-52 ~]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.75.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true } k8s-52 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:0d:04:bf brd ff:ff:ff:ff:ff:ff inet 192.168.26.52/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe0d:4bf/64 scope link valid_lft forever preferred_lft forever 3: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether 02:e3:00:4d:cd:33 brd ff:ff:ff:ff:ff:ff inet 10.26.75.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::e3:ff:fe4d:cd33/64 scope link valid_lft forever preferred_lft forever 4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:6d:94:06:92 brd ff:ff:ff:ff:ff:ff inet 10.26.75.1/24 brd 10.26.75.255 scope global docker0 valid_lft forever preferred_lft forever
k8s-51 ~]# cat /etc/docker/daemon.json { "data-root": "/data/docker", "storage-driver": "overlay2", "insecure-registries": ["harbor.oss.com:32310"], "registry-mirrors": ["https://5gce61mx.mirror.aliyuncs.com"], "bip": "10.26.6.1/24", "exec-opts": ["native.cgroupdriver=systemd"], "live-restore": true } k8s-51 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:c6:99:5e brd ff:ff:ff:ff:ff:ff inet 192.168.26.51/24 brd 192.168.26.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fec6:995e/64 scope link valid_lft forever preferred_lft forever 3: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN group default link/ether 2e:2b:9b:b9:83:3d brd ff:ff:ff:ff:ff:ff inet 10.26.6.0/32 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::2c2b:9bff:feb9:833d/64 scope link valid_lft forever preferred_lft forever 4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:e3:ae:92:cf brd ff:ff:ff:ff:ff:ff inet 10.26.6.1/24 brd 10.26.6.255 scope global docker0 valid_lft forever preferred_lft forever
在k8s-51、k8s-52、k8s-53启动容器:
51 ~]# docker run -i -t --name node51 centos /bin/bash [root@5b05cd016a5f /]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 5: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:0a:1a:06:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 10.26.6.2/24 brd 10.26.6.255 scope global eth0 valid_lft forever preferred_lft forever 52 ~]# docker run -i -t --name node52 centos /bin/bash [root@41f15af3fdaf /]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 5: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:0a:1a:4b:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 10.26.75.2/24 brd 10.26.75.255 scope global eth0 valid_lft forever preferred_lft forever 53 ~]# docker run -i -t --name node53 centos /bin/bash [root@890f2c8150dc /]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever 5: eth0@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default link/ether 02:42:0a:1a:19:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0 inet 10.26.25.2/24 brd 10.26.25.255 scope global eth0 valid_lft forever preferred_lft forever
## ping k8s-52上的容器10.26.75.2 [root@5b05cd016a5f /]# ping 10.26.75.2 -c 3 PING 10.26.75.2 (10.26.75.2) 56(84) bytes of data. 64 bytes from 10.26.75.2: icmp_seq=1 ttl=62 time=0.452 ms 64 bytes from 10.26.75.2: icmp_seq=2 ttl=62 time=0.540 ms 64 bytes from 10.26.75.2: icmp_seq=3 ttl=62 time=0.513 ms --- 10.26.75.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.452/0.501/0.540/0.044 ms ## ping k8s-53上的容器10.26.25.2 [root@5b05cd016a5f /]# ping 10.26.25.2 -c 3 PING 10.26.25.2 (10.26.25.2) 56(84) bytes of data. 64 bytes from 10.26.25.2: icmp_seq=1 ttl=62 time=0.497 ms 64 bytes from 10.26.25.2: icmp_seq=2 ttl=62 time=0.518 ms 64 bytes from 10.26.25.2: icmp_seq=3 ttl=62 time=0.528 ms --- 10.26.25.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.497/0.514/0.528/0.022 ms
[root@5b05cd016a5f /]# ping 192.168.26.52 -c 3 PING 192.168.26.52 (192.168.26.52) 56(84) bytes of data. 64 bytes from 192.168.26.52: icmp_seq=1 ttl=63 time=0.377 ms 64 bytes from 192.168.26.52: icmp_seq=2 ttl=63 time=0.482 ms 64 bytes from 192.168.26.52: icmp_seq=3 ttl=63 time=0.482 ms --- 192.168.26.52 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.377/0.447/0.482/0.049 ms [root@5b05cd016a5f /]# ping 192.168.26.53 -c 3 PING 192.168.26.53 (192.168.26.53) 56(84) bytes of data. 64 bytes from 192.168.26.53: icmp_seq=1 ttl=63 time=0.308 ms 64 bytes from 192.168.26.53: icmp_seq=2 ttl=63 time=0.540 ms 64 bytes from 192.168.26.53: icmp_seq=3 ttl=63 time=0.533 ms --- 192.168.26.53 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.308/0.460/0.540/0.109 ms
k8s-51 ~]# ping 10.26.6.2 -c 3 PING 10.26.6.2 (10.26.6.2) 56(84) bytes of data. 64 bytes from 10.26.6.2: icmp_seq=1 ttl=64 time=0.036 ms 64 bytes from 10.26.6.2: icmp_seq=2 ttl=64 time=0.044 ms 64 bytes from 10.26.6.2: icmp_seq=3 ttl=64 time=0.041 ms --- 10.26.6.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.036/0.040/0.044/0.006 ms k8s-51 ~]# ping 10.26.75.2 -c 3 PING 10.26.75.2 (10.26.75.2) 56(84) bytes of data. 64 bytes from 10.26.75.2: icmp_seq=1 ttl=63 time=0.429 ms 64 bytes from 10.26.75.2: icmp_seq=2 ttl=63 time=0.535 ms 64 bytes from 10.26.75.2: icmp_seq=3 ttl=63 time=0.558 ms --- 10.26.75.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.429/0.507/0.558/0.059 ms k8s-51 ~]# ping 10.26.25.2 -c 3 PING 10.26.25.2 (10.26.25.2) 56(84) bytes of data. 64 bytes from 10.26.25.2: icmp_seq=1 ttl=63 time=0.463 ms 64 bytes from 10.26.25.2: icmp_seq=2 ttl=63 time=0.477 ms 64 bytes from 10.26.25.2: icmp_seq=3 ttl=63 time=0.499 ms --- 10.26.25.2 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.463/0.479/0.499/0.029 ms
[root@5b05cd016a5f /]# ping www.baidu.com -c 3
PING www.baidu.com (14.119.104.254) 56(84) bytes of data.
64 bytes from www.baidu.com (14.119.104.254): icmp_seq=1 ttl=127 time=10.5 ms
64 bytes from www.baidu.com (14.119.104.254): icmp_seq=2 ttl=127 time=9.96 ms
64 bytes from www.baidu.com (14.119.104.254): icmp_seq=3 ttl=127 time=15.2 ms
--- www.baidu.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 9.964/11.893/15.195/2.348 ms
步骤同上。
## 解压软件包,并将运行软件放到/opt/bin目录 app]# tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /opt/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} ]# ls -l /opt/bin/kube* -rwxr-xr-x 1 root root 121683968 10月 18 20:02 /opt/bin/kube-apiserver -rwxr-xr-x 1 root root 117706752 10月 18 20:02 /opt/bin/kube-controller-manager -rwxr-xr-x 1 root root 49872896 10月 18 20:02 /opt/bin/kubectl -rwxr-xr-x 1 root root 110780416 10月 18 20:02 /opt/bin/kubelet -rwxr-xr-x 1 root root 55050240 10月 18 20:02 /opt/bin/kube-proxy -rwxr-xr-x 1 root root 56016896 10月 18 20:02 /opt/bin/kube-scheduler ]# ln -s /opt/bin/kubectl /usr/local/bin/kubectl ]# /opt/bin/kubelet --version Kubernetes v1.28.3 ## 复制软件到其他节点,并创建软链接 ]# scp /opt/bin/kube* root@k8s-51:/opt/bin/ ]# scp /opt/bin/kube* root@k8s-52:/opt/bin/ ]# ln -s /opt/bin/kubectl /usr/local/bin/kubectl
使用 nginx方案,kube-apiserver中的配置为: --server=https://127.0.0.1:8443
## 在一台有开发环境的主机上进行编译安装,然后复制到集群节点
app]# tar xvf nginx-1.24.0.tar.gz
app]# cd nginx-1.24.0
nginx-1.24.0]# ./configure --with-stream --without-http --without-http_uwsgi_module --without-http_scgi_module --without-http_fastcgi_module
nginx-1.24.0]# make && make install
nginx-1.24.0]# ls -l /usr/local/nginx
drwxr-xr-x 2 root root 333 7月 3 10:55 conf
drwxr-xr-x 2 root root 40 7月 3 10:55 html
drwxr-xr-x 2 root root 6 7月 3 10:55 logs
drwxr-xr-x 2 root root 19 7月 3 10:55 sbin
# 写入nginx配置文件 cat > /usr/local/nginx/conf/kube-nginx.conf <<EOF worker_processes 1; events { worker_connections 1024; } stream { upstream backend { least_conn; hash $remote_addr consistent; server 192.168.26.51:6443 max_fails=3 fail_timeout=30s; server 192.168.26.52:6443 max_fails=3 fail_timeout=30s; server 192.168.26.53:6443 max_fails=3 fail_timeout=30s; } server { listen 127.0.0.1:8443; proxy_connect_timeout 1s; proxy_pass backend; } } EOF
## 复制到集群节点
nginx-1.24.0]# scp -r /usr/local/nginx root@k8s-51:/usr/local/nginx/
nginx-1.24.0]# scp -r /usr/local/nginx root@k8s-52:/usr/local/nginx/
nginx-1.24.0]# scp -r /usr/local/nginx root@k8s-53:/usr/local/nginx/
# 写入启动配置文件 cat > /etc/systemd/system/kube-nginx.service <<EOF [Unit] Description=kube-apiserver nginx proxy After=network.target After=network-online.target Wants=network-online.target [Service] Type=forking ExecStartPre=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -t ExecStart=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx ExecReload=/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/kube-nginx.conf -p /usr/local/nginx -s reload PrivateTmp=true Restart=always RestartSec=5 StartLimitInterval=0 LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF
# 设置开机自启
]# systemctl enable --now kube-nginx
]# systemctl restart kube-nginx
]# systemctl status kube-nginx
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-apiserver \\ --v=2 \\ --allow-privileged=true \\ --bind-address=0.0.0.0 \\ --secure-port=6443 \\ --advertise-address=192.168.26.51 \\ --service-cluster-ip-range=10.168.0.0/16 \\ --service-node-port-range=30000-32767 \\ --etcd-servers=https://192.168.26.51:2379,https://192.168.26.52:2379,https://192.168.26.53:2379 \\ --etcd-cafile=/opt/cert/etcd-ca.pem \\ --etcd-certfile=/opt/cert/etcd.pem \\ --etcd-keyfile=/opt/cert/etcd-key.pem \\ --client-ca-file=/opt/cert/ca.pem \\ --tls-cert-file=/opt/cert/apiserver.pem \\ --tls-private-key-file=/opt/cert/apiserver-key.pem \\ --kubelet-client-certificate=/opt/cert/apiserver.pem \\ --kubelet-client-key=/opt/cert/apiserver-key.pem \\ --service-account-key-file=/opt/cert/sa.pub \\ --service-account-signing-key-file=/opt/cert/sa.key \\ --service-account-issuer=https://kubernetes.default.svc.cluster.local \\ --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\ --authorization-mode=Node,RBAC \\ --enable-bootstrap-token-auth=true \\ --requestheader-client-ca-file=/opt/cert/front-proxy-ca.pem \\ --proxy-client-cert-file=/opt/cert/front-proxy-client.pem \\ --proxy-client-key-file=/opt/cert/front-proxy-client-key.pem \\ --requestheader-allowed-names=aggregator \\ --requestheader-group-headers=X-Remote-Group \\ --requestheader-extra-headers-prefix=X-Remote-Extra- \\ --requestheader-username-headers=X-Remote-User \\ --enable-aggregator-routing=true # --feature-gates=IPv6DualStack=true # --token-auth-file=/opt/cert/token.csv Restart=on-failure RestartSec=10s LimitNOFILE=65535 [Install] WantedBy=multi-user.target EOF
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-apiserver \\ --v=2 \\ --allow-privileged=true \\ --bind-address=0.0.0.0 \\ --secure-port=6443 \\ --advertise-address=192.168.26.52 \\ --service-cluster-ip-range=10.168.0.0/16 \\ --service-node-port-range=30000-32767 \\ --etcd-servers=https://192.168.26.51:2379,https://192.168.26.52:2379,https://192.168.26.53:2379 \\ --etcd-cafile=/opt/cert/etcd-ca.pem \\ --etcd-certfile=/opt/cert/etcd.pem \\ --etcd-keyfile=/opt/cert/etcd-key.pem \\ --client-ca-file=/opt/cert/ca.pem \\ --tls-cert-file=/opt/cert/apiserver.pem \\ --tls-private-key-file=/opt/cert/apiserver-key.pem \\ --kubelet-client-certificate=/opt/cert/apiserver.pem \\ --kubelet-client-key=/opt/cert/apiserver-key.pem \\ --service-account-key-file=/opt/cert/sa.pub \\ --service-account-signing-key-file=/opt/cert/sa.key \\ --service-account-issuer=https://kubernetes.default.svc.cluster.local \\ --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\ --authorization-mode=Node,RBAC \\ --enable-bootstrap-token-auth=true \\ --requestheader-client-ca-file=/opt/cert/front-proxy-ca.pem \\ --proxy-client-cert-file=/opt/cert/front-proxy-client.pem \\ --proxy-client-key-file=/opt/cert/front-proxy-client-key.pem \\ --requestheader-allowed-names=aggregator \\ --requestheader-group-headers=X-Remote-Group \\ --requestheader-extra-headers-prefix=X-Remote-Extra- \\ --requestheader-username-headers=X-Remote-User \\ --enable-aggregator-routing=true # --feature-gates=IPv6DualStack=true # --token-auth-file=/opt/cert/token.csv Restart=on-failure RestartSec=10s LimitNOFILE=65535 [Install] WantedBy=multi-user.target EOF
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-apiserver \\ --v=2 \\ --allow-privileged=true \\ --bind-address=0.0.0.0 \\ --secure-port=6443 \\ --advertise-address=192.168.26.53 \\ --service-cluster-ip-range=10.168.0.0/16 \\ --service-node-port-range=30000-32767 \\ --etcd-servers=https://192.168.26.51:2379,https://192.168.26.52:2379,https://192.168.26.53:2379 \\ --etcd-cafile=/opt/cert/etcd-ca.pem \\ --etcd-certfile=/opt/cert/etcd.pem \\ --etcd-keyfile=/opt/cert/etcd-key.pem \\ --client-ca-file=/opt/cert/ca.pem \\ --tls-cert-file=/opt/cert/apiserver.pem \\ --tls-private-key-file=/opt/cert/apiserver-key.pem \\ --kubelet-client-certificate=/opt/cert/apiserver.pem \\ --kubelet-client-key=/opt/cert/apiserver-key.pem \\ --service-account-key-file=/opt/cert/sa.pub \\ --service-account-signing-key-file=/opt/cert/sa.key \\ --service-account-issuer=https://kubernetes.default.svc.cluster.local \\ --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\ --authorization-mode=Node,RBAC \\ --enable-bootstrap-token-auth=true \\ --requestheader-client-ca-file=/opt/cert/front-proxy-ca.pem \\ --proxy-client-cert-file=/opt/cert/front-proxy-client.pem \\ --proxy-client-key-file=/opt/cert/front-proxy-client-key.pem \\ --requestheader-allowed-names=aggregator \\ --requestheader-group-headers=X-Remote-Group \\ --requestheader-extra-headers-prefix=X-Remote-Extra- \\ --requestheader-username-headers=X-Remote-User \\ --enable-aggregator-routing=true # --feature-gates=IPv6DualStack=true # --token-auth-file=/opt/cert/token.csv Restart=on-failure RestartSec=10s LimitNOFILE=65535 [Install] WantedBy=multi-user.target EOF
]# systemctl daemon-reload && systemctl enable --now kube-apiserver ## 注意查看状态是否启动正常 ]# systemctl status kube-apiserver ]# curl -k --cacert /opt/cert/ca.pem \ --cert /opt/cert/apiserver.pem \ --key /opt/cert/apiserver-key.pem \ https://192.168.26.51:6443/healthz ok ]# ip_head='192.168.26';for i in 51 52 53;do \ curl -k --cacert /opt/cert/ca.pem \ --cert /opt/cert/apiserver.pem \ --key /opt/cert/apiserver-key.pem \ https://${ip_head}.${i}:6443/healthz; \ done okokok
-server=https://127.0.0.1:8443
。在一个节点执行一次即可kubectl config set-cluster kubernetes \ --certificate-authority=/opt/cert/ca.pem \ --embed-certs=true \ --server=https://127.0.0.1:8443 \ --kubeconfig=/opt/cert/admin.kubeconfig kubectl config set-credentials kubernetes-admin \ --client-certificate=/opt/cert/admin.pem \ --client-key=/opt/cert/admin-key.pem \ --embed-certs=true \ --kubeconfig=/opt/cert/admin.kubeconfig kubectl config set-context kubernetes-admin@kubernetes \ --cluster=kubernetes \ --user=kubernetes-admin \ --kubeconfig=/opt/cert/admin.kubeconfig kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/opt/cert/admin.kubeconfig ]# mkdir ~/.kube ]# cp /opt/cert/admin.kubeconfig ~/.kube/config ]# scp -r ~/.kube root@k8s-52:~/. ]# scp -r ~/.kube root@k8s-51:~/.
~]# echo 'source <(kubectl completion bash)' >> ~/.bashrc
~]# yum -y install bash-completion
~]# source /usr/share/bash-completion/bash_completion
~]# source <(kubectl completion bash)
~]# kubectl get componentstatuses
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Unhealthy Get "https://127.0.0.1:10259/healthz": dial tcp 127.0.0.1:10259: connect: connection refused
controller-manager Unhealthy Get "https://127.0.0.1:10257/healthz": dial tcp 127.0.0.1:10257: connect: connection refused
etcd-0 Healthy
etcd-2 Healthy
etcd-1 Healthy
所有master节点配置,且配置相同。 10.26.0.0/16为pod网段,按需求设置你自己的网段。
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-controller-manager \\ --v=2 \\ --bind-address=0.0.0.0 \\ --root-ca-file=/opt/cert/ca.pem \\ --cluster-signing-cert-file=/opt/cert/ca.pem \\ --cluster-signing-key-file=/opt/cert/ca-key.pem \\ --service-account-private-key-file=/opt/cert/sa.key \\ --kubeconfig=/opt/cert/controller-manager.kubeconfig \\ --leader-elect=true \\ --use-service-account-credentials=true \\ --node-monitor-grace-period=40s \\ --node-monitor-period=5s \\ --controllers=*,bootstrapsigner,tokencleaner \\ --allocate-node-cidrs=true \\ --service-cluster-ip-range=10.168.0.0/16 \\ --cluster-cidr=10.26.0.0/16 \\ --node-cidr-mask-size-ipv4=24 \\ --requestheader-client-ca-file=/opt/cert/front-proxy-ca.pem Restart=always RestartSec=10s [Install] WantedBy=multi-user.target EOF
-server=https://127.0.0.1:8443
。在一个节点执行一次即可。kubectl config set-cluster kubernetes \ --certificate-authority=/opt/cert/ca.pem \ --embed-certs=true \ --server=https://127.0.0.1:8443 \ --kubeconfig=/opt/cert/controller-manager.kubeconfig ## 设置一个环境项,一个上下文 kubectl config set-context system:kube-controller-manager@kubernetes \ --cluster=kubernetes \ --user=system:kube-controller-manager \ --kubeconfig=/opt/cert/controller-manager.kubeconfig ## 设置一个用户项 kubectl config set-credentials system:kube-controller-manager \ --client-certificate=/opt/cert/controller-manager.pem \ --client-key=/opt/cert/controller-manager-key.pem \ --embed-certs=true \ --kubeconfig=/opt/cert/controller-manager.kubeconfig ## 设置默认环境 kubectl config use-context system:kube-controller-manager@kubernetes \ --kubeconfig=/opt/cert/controller-manager.kubeconfig ## 复制/opt/cert/controller-manager.kubeconfig到其它节点 ]# scp /opt/cert/controller-manager.kubeconfig root@k8s-51:/opt/cert/controller-manager.kubeconfig ]# scp /opt/cert/controller-manager.kubeconfig root@k8s-52:/opt/cert/controller-manager.kubeconfig
]# systemctl daemon-reload
]# systemctl enable --now kube-controller-manager
]# systemctl status kube-controller-manager
]# kubectl get componentstatuses
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Unhealthy Get "https://127.0.0.1:10259/healthz": dial tcp 127.0.0.1:10259: connect: connection refused
controller-manager Healthy ok
etcd-0 Healthy
etcd-2 Healthy
etcd-1 Healthy
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-scheduler \\ --v=2 \\ --bind-address=0.0.0.0 \\ --leader-elect=true \\ --kubeconfig=/opt/cert/scheduler.kubeconfig Restart=always RestartSec=10s [Install] WantedBy=multi-user.target EOF
-server=https://127.0.0.1:8443
。在一个节点执行一次即可。kubectl config set-cluster kubernetes \ --certificate-authority=/opt/cert/ca.pem \ --embed-certs=true \ --server=https://127.0.0.1:8443 \ --kubeconfig=/opt/cert/scheduler.kubeconfig kubectl config set-credentials system:kube-scheduler \ --client-certificate=/opt/cert/scheduler.pem \ --client-key=/opt/cert/scheduler-key.pem \ --embed-certs=true \ --kubeconfig=/opt/cert/scheduler.kubeconfig kubectl config set-context system:kube-scheduler@kubernetes \ --cluster=kubernetes \ --user=system:kube-scheduler \ --kubeconfig=/opt/cert/scheduler.kubeconfig kubectl config use-context system:kube-scheduler@kubernetes \ --kubeconfig=/opt/cert/scheduler.kubeconfig ## 复制/opt/cert/scheduler.kubeconfig到其它节点 ]# scp /opt/cert/scheduler.kubeconfig root@k8s-51:/opt/cert/scheduler.kubeconfig ]# scp /opt/cert/scheduler.kubeconfig root@k8s-52:/opt/cert/scheduler.kubeconfig
]# systemctl daemon-reload
]# systemctl enable --now kube-scheduler
]# systemctl status kube-scheduler
]# kubectl get componentstatuses
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-0 Healthy ok
-server=https://127.0.0.1:8443
。在一个节点执行一次即可。kubectl config set-cluster kubernetes \ --certificate-authority=/opt/cert/ca.pem \ --embed-certs=true --server=https://127.0.0.1:8443 \ --kubeconfig=/opt/cert/bootstrap-kubelet.kubeconfig kubectl config set-credentials tls-bootstrap-token-user \ --token=bc5692.ebcfbe81d917383c \ --kubeconfig=/opt/cert/bootstrap-kubelet.kubeconfig kubectl config set-context tls-bootstrap-token-user@kubernetes \ --cluster=kubernetes \ --user=tls-bootstrap-token-user \ --kubeconfig=/opt/cert/bootstrap-kubelet.kubeconfig kubectl config use-context tls-bootstrap-token-user@kubernetes \ --kubeconfig=/opt/cert/bootstrap-kubelet.kubeconfig ## 复制/opt/cert/bootstrap-kubelet.kubeconfig到其它节点 ]# scp /opt/cert/bootstrap-kubelet.kubeconfig root@k8s-51:/opt/cert/bootstrap-kubelet.kubeconfig ]# scp /opt/cert/bootstrap-kubelet.kubeconfig root@k8s-52:/opt/cert/bootstrap-kubelet.kubeconfig
token的位置在bootstrap.secret.yaml(附:yaml文件:bootstrap.secret.yaml),如果修改的话到这个文件修改。
## 创建token。(也可以自已定义)
~]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
bc5692ebcfbe81d917383c89e60d4388
## 修改: apiVersion: v1 kind: Secret metadata: name: bootstrap-token-bc5692 ##修改,对应token前6位 namespace: kube-system type: bootstrap.kubernetes.io/token stringData: description: "The default bootstrap token generated by 'kubelet '." token-id: bc5692 ##修改,对应token前6位 token-secret: ebcfbe81d917383c ##修改,对应token前7-22位共16个字符 ... yaml]# kubectl create -f bootstrap.secret.yaml secret/bootstrap-token-bc5692 created clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-bootstrap created clusterrolebinding.rbac.authorization.k8s.io/node-autoapprove-certificate-rotation created clusterrole.rbac.authorization.k8s.io/system:kube-apiserver-to-kubelet created clusterrolebinding.rbac.authorization.k8s.io/system:kube-apiserver created
~]# mkdir /data/kubernetes/data/kubelet -p
cat > /usr/lib/systemd/system/kubelet.service << EOF [Unit] Description=Kubernetes Kubelet Documentation=https://github.com/kubernetes/kubernetes After=cri-dockerd.service Requires=cri-dockerd.service [Service] WorkingDirectory=/data/kubernetes/data/kubelet ExecStart=/opt/bin/kubelet \\ --bootstrap-kubeconfig=/opt/cert/bootstrap-kubelet.kubeconfig \\ --cert-dir=/opt/cert \\ --kubeconfig=/opt/cert/kubelet.kubeconfig \\ --config=/opt/cfg/kubelet.json \\ --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock \\ --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9 \\ --root-dir=/data/kubernetes/data/kubelet \\ --v=2 Restart=on-failure RestartSec=5 [Install] WantedBy=multi-user.target EOF
/opt/cert/kubelet.kubeconfig为自动创建的文件,如果已存在就删除
cat > /opt/cfg/kubelet.json << EOF { "kind": "KubeletConfiguration", "apiVersion": "kubelet.config.k8s.io/v1beta1", "authentication": { "x509": { "clientCAFile": "/opt/cert/ca.pem" }, "webhook": { "enabled": true, "cacheTTL": "2m0s" }, "anonymous": { "enabled": false } }, "authorization": { "mode": "Webhook", "webhook": { "cacheAuthorizedTTL": "5m0s", "cacheUnauthorizedTTL": "30s" } }, "address": "192.168.26.51", "port": 10250, "readOnlyPort": 10255, "cgroupDriver": "systemd", "hairpinMode": "promiscuous-bridge", "serializeImagePulls": false, "clusterDomain": "cluster.local.", "clusterDNS": ["10.168.0.2"] } EOF
注意修改:“address”: “192.168.26.51”;
“address”: “192.168.26.52”;
“address”: “192.168.26.53”
~]# systemctl daemon-reload
~]# systemctl enable --now kubelet
~]# systemctl status kubelet
~]# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
k8s-51 NotReady <none> 4m2s v1.28.3 192.168.26.51 <none> CentOS Linux 7 (Core) 3.10.0-1160.90.1.el7.x86_64 docker://24.0.6
k8s-52 NotReady <none> 3m29s v1.28.3 192.168.26.52 <none> CentOS Linux 7 (Core) 3.10.0-1160.90.1.el7.x86_64 docker://24.0.6
k8s-53 NotReady <none> 5m50s v1.28.3 192.168.26.53 <none> CentOS Linux 7 (Core) 3.10.0-1160.90.1.el7.x86_64 docker://24.0.6
## 查看kubelet证书请求
~]# kubectl get csr
NAME AGE SIGNERNAME REQUESTOR REQUESTEDDURATION CONDITION
node-csr-CfHXXoZlsfKqXMmSk3SiSSdte1lvZBCnHrHAH9rP3YU 4m11s kubernetes.io/kube-apiserver-client-kubelet system:bootstrap:bc5692 <none> Approved,Issued
node-csr-OFq3aEDV9qALiEcPTAdd-KhCphY3oNuNo3FY5Bmwf6Y 6m32s kubernetes.io/kube-apiserver-client-kubelet system:bootstrap:bc5692 <none> Approved,Issued
node-csr-PWhp9MLFoGuZBW1PQ8s-_QP0V--W46FtuURrgviMtRU 4m44s kubernetes.io/kube-apiserver-client-kubelet system:bootstrap:bc5692 <none>
## 如果处于Pending状态,则批准申请
~]# kubectl certificate approve node-csr-......
如果node仍然是NotReady
,则需要安装cni-plugin-flannel。(参见后面的核心插件部署)
~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-51 NotReady <none> 5m33s v1.28.3
k8s-52 NotReady <none> 5m v1.28.3
k8s-53 NotReady <none> 7m21s v1.28.3
-server=https://127.0.0.1:8443
。在一个节点执行一次即可。]# kubectl config set-cluster kubernetes \ --certificate-authority=/opt/cert/ca.pem \ --embed-certs=true \ --server=https://127.0.0.1:8443 \ --kubeconfig=/opt/cert/kube-proxy.kubeconfig ]# kubectl config set-credentials kube-proxy \ --client-certificate=/opt/cert/kube-proxy.pem \ --client-key=/opt/cert/kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=/opt/cert/kube-proxy.kubeconfig ]# kubectl config set-context kube-proxy@kubernetes \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=/opt/cert/kube-proxy.kubeconfig ]# kubectl config use-context kube-proxy@kubernetes --kubeconfig=/opt/cert/kube-proxy.kubeconfig ## 复制/opt/cert/kube-proxy.kubeconfig到各节点 ]# scp /opt/cert/kube-proxy.kubeconfig root@k8s-51:/opt/cert/kube-proxy.kubeconfig ]# scp /opt/cert/kube-proxy.kubeconfig root@k8s-52:/opt/cert/kube-proxy.kubeconfig
cat > /usr/lib/systemd/system/kube-proxy.service << EOF [Unit] Description=Kubernetes Kube Proxy Documentation=https://github.com/kubernetes/kubernetes After=network.target [Service] ExecStart=/opt/bin/kube-proxy \\ --config=/opt/cfg/kube-proxy.yaml \\ --v=2 Restart=always RestartSec=10s [Install] WantedBy=multi-user.target EOF
cat > /opt/cfg/kube-proxy.yaml << EOF apiVersion: kubeproxy.config.k8s.io/v1alpha1 bindAddress: 0.0.0.0 clientConnection: acceptContentTypes: "" burst: 10 contentType: application/vnd.kubernetes.protobuf kubeconfig: /opt/cert/kube-proxy.kubeconfig qps: 5 clusterCIDR: 10.26.0.0/16 configSyncPeriod: 15m0s conntrack: max: null maxPerCore: 32768 min: 131072 tcpCloseWaitTimeout: 1h0m0s tcpEstablishedTimeout: 24h0m0s enableProfiling: false healthzBindAddress: 0.0.0.0:10256 hostnameOverride: "" iptables: masqueradeAll: false masqueradeBit: 14 minSyncPeriod: 0s syncPeriod: 30s ipvs: masqueradeAll: true minSyncPeriod: 5s scheduler: "rr" syncPeriod: 30s kind: KubeProxyConfiguration metricsBindAddress: 127.0.0.1:10249 mode: "ipvs" nodePortAddresses: null oomScoreAdj: -999 portRange: "" udpIdleTimeout: 250ms EOF
]# systemctl daemon-reload
]# systemctl enable --now kube-proxy
]# systemctl status kube-proxy
https://github.com/containernetworking/plugins
下载:cni-plugins-linux-amd64-v1.2.0.tgz:https://github.com/containernetworking/plugins/releases/download/v1.2.0/cni-plugins-linux-amd64-v1.2.0.tgz
https://github.com/flannel-io/cni-plugin
下载:cni-plugin-flannel-linux-amd64-v1.2.0.tgz:https://github.com/flannel-io/cni-plugin/releases/download/v1.2.0/cni-plugin-flannel-linux-amd64-v1.2.0.tgz
]# mkdir -p /opt/cni/bin ]# cd /opt/cni/bin ]# curl -O -L https://github.com/containernetworking/plugins/releases/download/v1.2.0/cni-plugins-linux-amd64-v1.2.0.tgz ]# curl -O -L https://github.com/flannel-io/cni-plugin/releases/download/v1.2.0/cni-plugin-flannel-linux-amd64-v1.2.0.tgz ]# tar -C /opt/cni/bin -xzf cni-plugins-linux-amd64-v1.2.0.tgz ]# tar -C /opt/cni/bin -xzf cni-plugin-flannel-linux-amd64-v1.2.0.tgz ]# mv flannel-amd64 flannel ]# ls -l /opt/cni/bin 总用量 71296 -rwxr-xr-x 1 root root 3859475 1月 17 2023 bandwidth -rwxr-xr-x 1 root root 4299004 1月 17 2023 bridge -rwxr-xr-x 1 root root 10167415 1月 17 2023 dhcp -rwxr-xr-x 1 root root 3986082 1月 17 2023 dummy -rwxr-xr-x 1 root root 4385098 1月 17 2023 firewall -rwxr-xr-x 1 root root 2414517 7月 21 23:04 flannel -rwxr-xr-x 1 root root 3870731 1月 17 2023 host-device -rwxr-xr-x 1 root root 3287319 1月 17 2023 host-local -rwxr-xr-x 1 root root 3999593 1月 17 2023 ipvlan -rwxr-xr-x 1 root root 3353028 1月 17 2023 loopback -rwxr-xr-x 1 root root 4029261 1月 17 2023 macvlan -rwxr-xr-x 1 root root 3746163 1月 17 2023 portmap -rwxr-xr-x 1 root root 4161070 1月 17 2023 ptp -rwxr-xr-x 1 root root 3550152 1月 17 2023 sbr -rwxr-xr-x 1 root root 2845685 1月 17 2023 static -rwxr-xr-x 1 root root 3437180 1月 17 2023 tuning -rwxr-xr-x 1 root root 3993252 1月 17 2023 vlan ]# scp -r /opt/cni/bin root@k8s-51:/opt/cni/. ]# scp -r /opt/cni/bin root@k8s-52:/opt/cni/.
/etc/cni/net.d/10-flannel.conflist
~]# mkdir /etc/cni/net.d -p
~]# vi /etc/cni/net.d/10-flannel.conflist
{ "name": "cbr0", "cniVersion": "0.3.1", "plugins": [ { "type": "flannel", "delegate": { "hairpinMode": true, "isDefaultGateway": true } }, { "type": "portmap", "capabilities": { "portMappings": true } } ] }
~]# kubectl get nodes
~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-51 Ready <none> 4h33m v1.28.3
k8s-52 Ready <none> 4h32m v1.28.3
k8s-53 Ready <none> 4h34m v1.28.3
__DNS__DOMAIN__ 改为: cluster.local
__DNS__MEMORY__LIMIT__ 改为: 150Mi
__DNS__SERVER__ 改为: 10.168.0.2
image: docker pull registry.aliyuncs.com/google_containers/coredns:v1.10.1
cfg]# kubectl apply -f coredns.yaml
serviceaccount/coredns created
clusterrole.rbac.authorization.k8s.io/system:coredns created
clusterrolebinding.rbac.authorization.k8s.io/system:coredns created
configmap/coredns created
deployment.apps/coredns created
service/kube-dns created
cfg]# kubectl get pod -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system coredns-877fbbc8f-6jp22 0/1 Running 0 21s 10.26.25.10 k8s-53 <none> <none>
READY
状态不正常处理~]# kubectl -n kube-system describe pod coredns-6dffdfd7fb-6jp22 ## 出现以下信息 ... ... Warning Unhealthy 24m (x199 over 79m) kubelet Readiness probe failed: Get "http://10.26.25.8:8181/ready": context deadline exceeded (Client.Timeout exceeded while awaiting headers) ... Warning Unhealthy 14m (x13 over 77m) kubelet Readiness probe failed: Get "http://10.26.25.8:8181/ready": dial tcp 10.26.25.8:8181: connect: no route to host ... Warning BackOff 9m47s (x179 over 70m) kubelet Back-off restarting failed container coredns in pod coredns-6dffdfd7fb-6jp22_kube-system(0b37a912-2233-4d96-9d3c-ec67a9d1b004) ... Warning Unhealthy 4m54s (x97 over 78m) kubelet Liveness probe failed: Get "http://10.26.25.8:8080/health": dial tcp 10.26.25.8:8080: connect: no route to host ... ## 在k8s-53上ping 10.26.25.10,发现主机k8s-53 ping不通自己主机上的pod ## 查看路由,发现10.26.25.0有两条路由 k8s-53 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.26.2 0.0.0.0 UG 100 0 0 ens32 10.26.6.0 10.26.6.0 255.255.255.0 UG 0 0 0 flannel.1 10.26.25.0 0.0.0.0 255.255.255.0 U 0 0 0 docker0 10.26.25.0 0.0.0.0 255.255.255.0 U 0 0 0 cni0 10.26.75.0 10.26.75.0 255.255.255.0 UG 0 0 0 flannel.1 192.168.26.0 0.0.0.0 255.255.255.0 U 100 0 0 ens32 ## 删除一条路由 k8s-53 ~]# route del -net 10.26.25.0 netmask 255.255.255.0 gw 0.0.0.0 ## 等一会查看pod状态,正常 ]# kubectl get pod -A -owide NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES kube-system coredns-6dffdfd7fb-6jp22 1/1 Running 130 (9m9s ago) 21h 10.26.25.10 k8s-53 <none> <none>
Kubernetes中系统资源的采集均使用Metrics-server,通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率。
https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.4/components.yaml
https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml
yaml]# vi components.yaml # 1 - --cert-dir=/tmp - --secure-port=4443 - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname - --kubelet-use-node-status-port - --metric-resolution=15s - --kubelet-insecure-tls - --requestheader-client-ca-file=/opt/cert/front-proxy-ca.pem - --requestheader-username-headers=X-Remote-User - --requestheader-group-headers=X-Remote-Group - --requestheader-extra-headers-prefix=X-Remote-Extra- # 2 volumeMounts: - mountPath: /tmp name: tmp-dir - name: ca-ssl mountPath: /opt/cert # 3 volumes: - emptyDir: {} name: tmp-dir - name: ca-ssl hostPath: path: /opt/cert # 4 修改为image镜像 image: registry.aliyuncs.com/google_containers/metrics-server:v0.6.4
cfg]# kubectl apply -f components.yaml serviceaccount/metrics-server created clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created clusterrole.rbac.authorization.k8s.io/system:metrics-server created rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created service/metrics-server created deployment.apps/metrics-server created apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created cfg]# kubectl get pod -n kube-system | grep metrics metrics-server-7747f5f88b-hxfzn 0/1 Running 0 27s ## READY状态正常,参考之前的处理 ]# kubectl top node NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% k8s-51 92m 4% 706Mi 19% k8s-52 83m 4% 682Mi 18% k8s-53 105m 5% 702Mi 19% ]# kubectl top pod -n kube-system NAME CPU(cores) MEMORY(bytes) coredns-6dffdfd7fb-6jp22 2m 16Mi metrics-server-7747f5f88b-hxfzn 3m 24Mi
https://github.com/kubernetes/dashboard/blob/v2.7.0/aio/deploy/recommended.yaml
... image: kubernetesui/dashboard:v2.7.0 imagePullPolicy: IfNotPresent #修改 ... image: kubernetesui/metrics-scraper:v1.0.8 imagePullPolicy: IfNotPresent #修改 ... kind: Service apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: type: NodePort #新增 ports: - port: 443 targetPort: 8443 nodePort: 32310 #新增 selector: k8s-app: kubernetes-dashboard ...
]# kubectl apply -f recommended.yaml namespace/kubernetes-dashboard created serviceaccount/kubernetes-dashboard created service/kubernetes-dashboard created secret/kubernetes-dashboard-certs created secret/kubernetes-dashboard-csrf created secret/kubernetes-dashboard-key-holder created configmap/kubernetes-dashboard-settings created role.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created deployment.apps/kubernetes-dashboard created service/dashboard-metrics-scraper created deployment.apps/dashboard-metrics-scraper created ]# kubectl get pods,svc -n kubernetes-dashboard NAME READY STATUS RESTARTS AGE pod/dashboard-metrics-scraper-5657497c4c-5x67m 1/1 Running 0 27s pod/kubernetes-dashboard-5b749d9495-qrhpk 1/1 Running 0 27s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/dashboard-metrics-scraper ClusterIP 10.168.39.58 <none> 8000/TCP 27s service/kubernetes-dashboard NodePort 10.168.91.23 <none> 443:32310/TCP 27s
创建admin-user:]# vi dashboard-adminuser.yaml
https://github.com/kubernetes/dashboard/blob/master/docs/user/access-control/creating-sample-user.md
apiVersion: v1 kind: ServiceAccount metadata: name: admin-user namespace: kubernetes-dashboard --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: admin-user roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: admin-user namespace: kubernetes-dashboard
]# kubectl apply -f dashboard-adminuser.yaml
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
## 创建登录token
]# kubectl -n kubernetes-dashboard create token admin-user
eyJhbGciOiJSUzI1NiIsImtpZCI6Im1uRzB2bllQbEkxd2pocnZKS2JUSXlFSnQ3SXMwTjRncW9XOGF1cFlJOVkifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjk4MDMwODExLCJpYXQiOjE2OTgwMjcyMTEsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiNjI2MmNmMGQtYzMyMi00NzcxLTk3ZDctYWY2YjUwYTAzYmUzIn19LCJuYmYiOjE2OTgwMjcyMTEsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlcm5ldGVzLWRhc2hib2FyZDphZG1pbi11c2VyIn0.o3GG09-WyCE1bRFm_6z81DR7KVBkZkKuBtAy7H1GslMCFemSrimlTH_F2DEiSYZoT8ud1W95q0Xi0YYYl0GIC6xd3Jmo5XkKYqvWbQiRl90PrSXtQNG4wJIc2nwNXvlS5zKqjnKZNhpmw1_QhkUQJjvPZyKo9Zah5D5JU_cC6bJUpQhec5vkk6AtaxvkoaD8MB2L6RBoBv5l5bNmRkVPa52BbHpbUoQmY2hAaMIMdLEzbDv7w6Bi__HckVsIsNppFY1nn2hIaUPlrJz2Ns-XnUUywcWRmrTJ0oewZl2nnsuPOQny_JJeSQFYz8vu5kCP6SqVjGjnJb69Ukh9mgr5yg
]# vi busybox.yaml
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
imagePullPolicy: IfNotPresent
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
]# kubectl apply -f busybox.yaml
pod/busybox created
]# kubectl get pod
NAME READY STATUS RESTARTS AGE
busybox 1/1 Running 0 59s
cat > nginx.yaml << "EOF" --- apiVersion: v1 kind: ReplicationController metadata: name: nginx-web spec: replicas: 2 selector: name: nginx template: metadata: labels: name: nginx spec: containers: - name: nginx image: nginx:1.19.6 imagePullPolicy: IfNotPresent ports: - containerPort: 80 --- apiVersion: v1 kind: Service metadata: name: nginx-service-nodeport spec: ports: - port: 80 targetPort: 80 nodePort: 30001 protocol: TCP type: NodePort selector: name: nginx EOF
]# kubectl apply -f nginx.yaml
]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 16 (52m ago) 34h 10.26.6.6 k8s-51 <none> <none>
nginx-web-68gpj 0/1 ContainerCreating 0 95s <none> k8s-53 <none> <none>
nginx-web-zjk4b 0/1 ContainerCreating 0 95s <none> k8s-52 <none> <none>
## 要拉取镜像,需要等一会
]# kubectl get all
...
]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.168.0.1 <none> 443/TCP 47h
nginx-service-nodeport NodePort 10.168.238.209 <none> 80:30001/TCP 3m4s
浏览器访问:http://192.168.26.53:30001/
cat > nginx-deployment.yaml << EOF apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent ports: - containerPort: 80 EOF
]# kubectl apply -f nginx-deployment.yaml
deployment.apps/nginx-deployment created
]# kubectl get pod -owide |grep nginx-deployment
nginx-deployment-64888c994d-4qqb6 1/1 Running 0 3m6s 10.26.25.13 k8s-53 <none> <none>
nginx-deployment-64888c994d-h76v9 1/1 Running 0 3m6s 10.26.6.8 k8s-51 <none> <none>
nginx-deployment-64888c994d-n85lg 1/1 Running 0 3m6s 10.26.75.11 k8s-52 <none> <none> <none>
]# kubectl delete -f nginx-deployment.yaml
]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.168.0.1 <none> 443/TCP 47h
nginx-service-nodeport NodePort 10.168.238.209 <none> 80:30001/TCP 8m54s
]# kubectl exec busybox -n default -- nslookup kubernetes
Server: 10.168.0.2
Address 1: 10.168.0.2 kube-dns.kube-system.svc.cluster.local
Name: kubernetes
Address 1: 10.168.0.1 kubernetes.default.svc.cluster.local
]# kubectl exec busybox -n default -- nslookup kube-dns.kube-system
Server: 10.168.0.2
Address 1: 10.168.0.2 kube-dns.kube-system.svc.cluster.local
Name: kube-dns.kube-system
Address 1: 10.168.0.2 kube-dns.kube-system.svc.cluster.local
]# kubectl get svc -A NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE default kubernetes ClusterIP 10.168.0.1 <none> 443/TCP 47h default nginx-service-nodeport NodePort 10.168.238.209 <none> 80:30001/TCP 10m kube-system kube-dns ClusterIP 10.168.0.2 <none> 53/UDP,53/TCP,9153/TCP 22h kube-system metrics-server ClusterIP 10.168.241.18 <none> 443/TCP 82m kubernetes-dashboard dashboard-metrics-scraper ClusterIP 10.168.39.58 <none> 8000/TCP 45m kubernetes-dashboard kubernetes-dashboard NodePort 10.168.91.23 <none> 443:32310/TCP 45m ~]# telnet 10.168.0.1 443 Trying 10.168.0.1... Connected to 10.168.0.1. Escape character is '^]'. ~]# telnet 10.168.0.2 53 Trying 10.168.0.2... Connected to 10.168.0.2. Escape character is '^]'. ~]# curl 10.168.0.1:443 Client sent an HTTP request to an HTTPS server. ~]# curl 10.168.0.2:53 curl: (52) Empty reply from server
~]# kubectl get po -owide -A
default busybox 1/1 Running 17 (4m7s ago) 34h 10.26.6.6 k8s-51 <none> <none>
default nginx-deployment-64888c994d-4qqb6 1/1 Running 0 7m54s 10.26.25.13 k8s-53 <none> <none>
default nginx-deployment-64888c994d-h76v9 1/1 Running 0 7m54s 10.26.6.8 k8s-51 <none> <none>
default nginx-deployment-64888c994d-n85lg 1/1 Running 0 7m54s 10.26.75.11 k8s-52 <none> <none>
default nginx-web-68gpj 1/1 Running 0 12m 10.26.25.12 k8s-53 <none> <none>
default nginx-web-zjk4b 1/1 Running 0 12m 10.26.75.10 k8s-52 <none> <none>
kube-system coredns-6dffdfd7fb-6jp22 1/1 Running 130 (92m ago) 22h 10.26.25.10 k8s-53 <none> <none>
kube-system metrics-server-7747f5f88b-hxfzn 1/1 Running 2 (83m ago) 84m 10.26.75.9 k8s-52 <none> <none>
kubernetes-dashboard dashboard-metrics-scraper-5657497c4c-5x67m 1/1 Running 0 47m 10.26.25.11 k8s-53 <none> <none>
kubernetes-dashboard kubernetes-dashboard-5b749d9495-qrhpk 1/1 Running 0 47m 10.26.6.7 k8s-51 <none> <none>
进入busybox ping其他节点上的pod。可以连通证明这个pod是可以跨命名空间和跨主机通信的。
]# kubectl exec -ti busybox -- sh ## 主机k8s-51上的pod ping主机k8s-53(POD - 跨主机) / # ping 192.168.26.53 -c 3 PING 192.168.26.53 (192.168.26.53): 56 data bytes 64 bytes from 192.168.26.53: seq=0 ttl=63 time=0.227 ms 64 bytes from 192.168.26.53: seq=1 ttl=63 time=0.434 ms 64 bytes from 192.168.26.53: seq=2 ttl=63 time=0.817 ms ... ## 主机k8s-51上的pod ping主机k8s-53节点上的pod(跨主机跨命名空间) / # ping 10.26.25.13 -c 3 PING 10.26.25.13 (10.26.25.13): 56 data bytes 64 bytes from 10.26.25.13: seq=0 ttl=62 time=0.503 ms 64 bytes from 10.26.25.13: seq=1 ttl=62 time=0.526 ms 64 bytes from 10.26.25.13: seq=2 ttl=62 time=0.571 ms ... ## 从主机k8s-51节点ping k8s-52上的pod(跨主机 - POD) k8s-51 ~]# ping 10.26.75.11 -c 3 PING 10.26.75.11 (10.26.75.11) 56(84) bytes of data. 64 bytes from 10.26.75.11: icmp_seq=1 ttl=63 time=0.595 ms 64 bytes from 10.26.75.11: icmp_seq=2 ttl=63 time=0.541 ms 64 bytes from 10.26.75.11: icmp_seq=3 ttl=63 time=0.432 ms ...
至此,完美完成以二进制方式部署Kubernetes1.27.6 + docker24.0.6高可用集群。
碰到以下相关问题时可能需要花几小时或更长时间来处理。
vxlan
方式部署flannel网络插件后,需要根据生成的FLANNEL_SUBNET
更新docker配置文件中的bip
参数。FLANNEL_SUBNET
根据写入etcd的数据在重启时生成,因此修改/run/flannel/subnet.env
文件中的变量值无效。后续采用host-gw
方式部署,采用手动创建/run/flannel/subnet.env
文件,就不会有这个问题,和docker集成时采用规划的ip网段。(后续验证)Ready
。https://www.notion.so/yaml-6d8f19758949478b96d2934fbd554283?pvs=21
cat > bootstrap.secret.yaml << EOF apiVersion: v1 kind: Secret metadata: name: bootstrap-token-bc5692 namespace: kube-system type: bootstrap.kubernetes.io/token stringData: description: "The default bootstrap token generated by 'kubelet '." token-id: bc5692 token-secret: ebcfbe81d917383c usage-bootstrap-authentication: "true" usage-bootstrap-signing: "true" auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: kubelet-bootstrap roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:node-bootstrapper subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:bootstrappers:default-node-token --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: node-autoapprove-bootstrap roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:certificates.k8s.io:certificatesigningrequests:nodeclient subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:bootstrappers:default-node-token --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: node-autoapprove-certificate-rotation roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:nodes --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: annotations: rbac.authorization.kubernetes.io/autoupdate: "true" labels: kubernetes.io/bootstrapping: rbac-defaults name: system:kube-apiserver-to-kubelet rules: - apiGroups: - "" resources: - nodes/proxy - nodes/stats - nodes/log - nodes/spec - nodes/metrics verbs: - "*" --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: system:kube-apiserver namespace: "" roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:kube-apiserver-to-kubelet subjects: - apiGroup: rbac.authorization.k8s.io kind: User name: kube-apiserver EOF
# __MACHINE_GENERATED_WARNING__ apiVersion: v1 kind: ServiceAccount metadata: name: coredns namespace: kube-system labels: kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: labels: kubernetes.io/bootstrapping: rbac-defaults addonmanager.kubernetes.io/mode: Reconcile name: system:coredns rules: - apiGroups: - "" resources: - endpoints - services - pods - namespaces verbs: - list - watch - apiGroups: - "" resources: - nodes verbs: - get - apiGroups: - discovery.k8s.io resources: - endpointslices verbs: - list - watch --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: annotations: rbac.authorization.kubernetes.io/autoupdate: "true" labels: kubernetes.io/bootstrapping: rbac-defaults addonmanager.kubernetes.io/mode: EnsureExists name: system:coredns roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:coredns subjects: - kind: ServiceAccount name: coredns namespace: kube-system --- apiVersion: v1 kind: ConfigMap metadata: name: coredns namespace: kube-system labels: addonmanager.kubernetes.io/mode: EnsureExists data: Corefile: | .:53 { errors health { lameduck 5s } ready kubernetes __DNS__DOMAIN__ in-addr.arpa ip6.arpa { pods insecure fallthrough in-addr.arpa ip6.arpa ttl 30 } prometheus :9153 forward . /etc/resolv.conf { max_concurrent 1000 } cache 30 loop reload loadbalance } --- apiVersion: apps/v1 kind: Deployment metadata: name: coredns namespace: kube-system labels: k8s-app: kube-dns kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile kubernetes.io/name: "CoreDNS" spec: # replicas: not specified here: # 1. In order to make Addon Manager do not reconcile this replicas parameter. # 2. Default is 1. # 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on. strategy: type: RollingUpdate rollingUpdate: maxUnavailable: 1 selector: matchLabels: k8s-app: kube-dns template: metadata: labels: k8s-app: kube-dns spec: securityContext: seccompProfile: type: RuntimeDefault priorityClassName: system-cluster-critical serviceAccountName: coredns affinity: podAntiAffinity: preferredDuringSchedulingIgnoredDuringExecution: - weight: 100 podAffinityTerm: labelSelector: matchExpressions: - key: k8s-app operator: In values: ["kube-dns"] topologyKey: kubernetes.io/hostname tolerations: - key: "CriticalAddonsOnly" operator: "Exists" nodeSelector: kubernetes.io/os: linux containers: - name: coredns image: registry.k8s.io/coredns/coredns:v1.10.1 imagePullPolicy: IfNotPresent resources: limits: memory: __DNS__MEMORY__LIMIT__ requests: cpu: 100m memory: 70Mi args: [ "-conf", "/etc/coredns/Corefile" ] volumeMounts: - name: config-volume mountPath: /etc/coredns readOnly: true ports: - containerPort: 53 name: dns protocol: UDP - containerPort: 53 name: dns-tcp protocol: TCP - containerPort: 9153 name: metrics protocol: TCP livenessProbe: httpGet: path: /health port: 8080 scheme: HTTP initialDelaySeconds: 60 timeoutSeconds: 5 successThreshold: 1 failureThreshold: 5 readinessProbe: httpGet: path: /ready port: 8181 scheme: HTTP securityContext: allowPrivilegeEscalation: false capabilities: add: - NET_BIND_SERVICE drop: - all readOnlyRootFilesystem: true dnsPolicy: Default volumes: - name: config-volume configMap: name: coredns items: - key: Corefile path: Corefile --- apiVersion: v1 kind: Service metadata: name: kube-dns namespace: kube-system annotations: prometheus.io/port: "9153" prometheus.io/scrape: "true" labels: k8s-app: kube-dns kubernetes.io/cluster-service: "true" addonmanager.kubernetes.io/mode: Reconcile kubernetes.io/name: "CoreDNS" spec: selector: k8s-app: kube-dns clusterIP: __DNS__SERVER__ ports: - name: dns port: 53 protocol: UDP - name: dns-tcp port: 53 protocol: TCP - name: metrics port: 9153 protocol: TCP
apiVersion: v1 kind: ServiceAccount metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: labels: k8s-app: metrics-server rbac.authorization.k8s.io/aggregate-to-admin: "true" rbac.authorization.k8s.io/aggregate-to-edit: "true" rbac.authorization.k8s.io/aggregate-to-view: "true" name: system:aggregated-metrics-reader rules: - apiGroups: - metrics.k8s.io resources: - pods - nodes verbs: - get - list - watch --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: labels: k8s-app: metrics-server name: system:metrics-server rules: - apiGroups: - "" resources: - nodes/metrics verbs: - get - apiGroups: - "" resources: - pods - nodes verbs: - get - list - watch --- apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata: labels: k8s-app: metrics-server name: metrics-server-auth-reader namespace: kube-system roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: extension-apiserver-authentication-reader subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: labels: k8s-app: metrics-server name: metrics-server:system:auth-delegator roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:auth-delegator subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: labels: k8s-app: metrics-server name: system:metrics-server roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:metrics-server subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: v1 kind: Service metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system spec: ports: - name: https port: 443 protocol: TCP targetPort: https selector: k8s-app: metrics-server --- apiVersion: apps/v1 kind: Deployment metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system spec: selector: matchLabels: k8s-app: metrics-server strategy: rollingUpdate: maxUnavailable: 0 template: metadata: labels: k8s-app: metrics-server spec: containers: - args: - --cert-dir=/tmp - --secure-port=4443 - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname - --kubelet-use-node-status-port - --metric-resolution=15s image: registry.k8s.io/metrics-server/metrics-server:v0.6.4 imagePullPolicy: IfNotPresent livenessProbe: failureThreshold: 3 httpGet: path: /livez port: https scheme: HTTPS periodSeconds: 10 name: metrics-server ports: - containerPort: 4443 name: https protocol: TCP readinessProbe: failureThreshold: 3 httpGet: path: /readyz port: https scheme: HTTPS initialDelaySeconds: 20 periodSeconds: 10 resources: requests: cpu: 100m memory: 200Mi securityContext: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsNonRoot: true runAsUser: 1000 volumeMounts: - mountPath: /tmp name: tmp-dir nodeSelector: kubernetes.io/os: linux priorityClassName: system-cluster-critical serviceAccountName: metrics-server volumes: - emptyDir: {} name: tmp-dir --- apiVersion: apiregistration.k8s.io/v1 kind: APIService metadata: labels: k8s-app: metrics-server name: v1beta1.metrics.k8s.io spec: group: metrics.k8s.io groupPriorityMinimum: 100 insecureSkipTLSVerify: true service: name: metrics-server namespace: kube-system version: v1beta1 versionPriority: 100
# Copyright 2017 The Kubernetes Authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # <http://www.apache.org/licenses/LICENSE-2.0> # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. apiVersion: v1 kind: Namespace metadata: name: kubernetes-dashboard --- apiVersion: v1 kind: ServiceAccount metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard --- kind: Service apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: type: NodePort ports: - port: 443 targetPort: 8443 nodePort: 30237 selector: k8s-app: kubernetes-dashboard --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-certs namespace: kubernetes-dashboard type: Opaque --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-csrf namespace: kubernetes-dashboard type: Opaque data: csrf: "" --- apiVersion: v1 kind: Secret metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-key-holder namespace: kubernetes-dashboard type: Opaque --- kind: ConfigMap apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard-settings namespace: kubernetes-dashboard --- kind: Role apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard rules: # Allow Dashboard to get, update and delete Dashboard exclusive secrets. - apiGroups: [""] resources: ["secrets"] resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"] verbs: ["get", "update", "delete"] # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map. - apiGroups: [""] resources: ["configmaps"] resourceNames: ["kubernetes-dashboard-settings"] verbs: ["get", "update"] # Allow Dashboard to get metrics. - apiGroups: [""] resources: ["services"] resourceNames: ["heapster", "dashboard-metrics-scraper"] verbs: ["proxy"] - apiGroups: [""] resources: ["services/proxy"] resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"] verbs: ["get"] --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard rules: # Allow Metrics Scraper to get metrics from the Metrics server - apiGroups: ["metrics.k8s.io"] resources: ["pods", "nodes"] verbs: ["get", "list", "watch"] --- apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: kubernetes-dashboard subjects: - kind: ServiceAccount name: kubernetes-dashboard namespace: kubernetes-dashboard --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: kubernetes-dashboard roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: kubernetes-dashboard subjects: - kind: ServiceAccount name: kubernetes-dashboard namespace: kubernetes-dashboard --- kind: Deployment apiVersion: apps/v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: replicas: 1 revisionHistoryLimit: 10 selector: matchLabels: k8s-app: kubernetes-dashboard template: metadata: labels: k8s-app: kubernetes-dashboard spec: securityContext: seccompProfile: type: RuntimeDefault containers: - name: kubernetes-dashboard image: kubernetesui/dashboard:v2.7.0 imagePullPolicy: IfNotPresent ports: - containerPort: 8443 protocol: TCP args: - --auto-generate-certificates - --namespace=kubernetes-dashboard # Uncomment the following line to manually specify Kubernetes API server Host # If not specified, Dashboard will attempt to auto discover the API server and connect # to it. Uncomment only if the default does not work. # - --apiserver-host=http://my-address:port volumeMounts: - name: kubernetes-dashboard-certs mountPath: /certs # Create on-disk volume to store exec logs - mountPath: /tmp name: tmp-volume livenessProbe: httpGet: scheme: HTTPS path: / port: 8443 initialDelaySeconds: 30 timeoutSeconds: 30 securityContext: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsUser: 1001 runAsGroup: 2001 volumes: - name: kubernetes-dashboard-certs secret: secretName: kubernetes-dashboard-certs - name: tmp-volume emptyDir: {} serviceAccountName: kubernetes-dashboard nodeSelector: "kubernetes.io/os": linux # Comment the following tolerations if Dashboard must not be deployed on master tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule --- kind: Service apiVersion: v1 metadata: labels: k8s-app: dashboard-metrics-scraper name: dashboard-metrics-scraper namespace: kubernetes-dashboard spec: ports: - port: 8000 targetPort: 8000 selector: k8s-app: dashboard-metrics-scraper --- kind: Deployment apiVersion: apps/v1 metadata: labels: k8s-app: dashboard-metrics-scraper name: dashboard-metrics-scraper namespace: kubernetes-dashboard spec: replicas: 1 revisionHistoryLimit: 10 selector: matchLabels: k8s-app: dashboard-metrics-scraper template: metadata: labels: k8s-app: dashboard-metrics-scraper spec: securityContext: seccompProfile: type: RuntimeDefault containers: - name: dashboard-metrics-scraper image: kubernetesui/metrics-scraper:v1.0.8 imagePullPolicy: IfNotPresent ports: - containerPort: 8000 protocol: TCP livenessProbe: httpGet: scheme: HTTP path: / port: 8000 initialDelaySeconds: 30 timeoutSeconds: 30 volumeMounts: - mountPath: /tmp name: tmp-volume securityContext: allowPrivilegeEscalation: false readOnlyRootFilesystem: true runAsUser: 1001 runAsGroup: 2001 serviceAccountName: kubernetes-dashboard nodeSelector: "kubernetes.io/os": linux # Comment the following tolerations if Dashboard must not be deployed on master tolerations: - key: node-role.kubernetes.io/master effect: NoSchedule volumes: - name: tmp-volume emptyDir: {}
apiVersion: v1 kind: ServiceAccount metadata: name: admin-user namespace: kubernetes-dashboard --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: admin-user roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: admin-user namespace: kubernetes-dashboard
--- apiVersion: v1 kind: ReplicationController metadata: name: nginx-web spec: replicas: 2 selector: name: nginx template: metadata: labels: name: nginx spec: containers: - name: nginx image: nginx:1.19.6 imagePullPolicy: IfNotPresent ports: - containerPort: 80 --- apiVersion: v1 kind: Service metadata: name: nginx-service-nodeport spec: ports: - port: 80 targetPort: 80 nodePort: 30001 protocol: TCP type: NodePort selector: name: nginx
apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx imagePullPolicy: IfNotPresent ports: - containerPort: 80
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
imagePullPolicy: IfNotPresent
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
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