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Keepalived是一个在Linux环境下运行的轻量级高可用性解决方案,它起初是专为Linux Virtual Server (LVS) 设计的,用于监控和管理LVS集群中的各个服务节点状态。Keepalived通过集成VRRP(Virtual Router Redundancy Protocol,虚拟路由器冗余协议)功能,提供了一种简单的高可用解决方案,可以用于实现服务器的高可用性。
这里Rocky有点问题,就换成openEuler
Server Name | IP Address with Subnet Mask | 发行版 |
---|---|---|
keepalived-01 | 192.168.110.41/24 | openEuler |
keepalived-02 | 192.168.110.42/24 | openEuler |
web-01 | 192.168.110.33/24 | Rocky Linux 8 |
web-01 | 192.168.110.34/24 | Rocky Linux 8 |
[root@keepalived-01 ~]# yum install nginx keepalived -y [root@keepalived-02 ~]# yum install nginx keepalived -y [root@web-01 ~]# yum install nginx -y [root@web-02 ~]# yum install nginx -y
[root@web-01 ~]# mkdir -p /nginx/web [root@web-01 ~]# echo "This is web-01 page IP=`hostname -I`" >> /nginx/web/index.html [root@web-01 ~]# vim /etc/nginx/conf.d/VirtualHost.conf server { listen 192.168.110.33:80; server_name www.web-01.com; location / { root /nginx/web; index index.html; } } [root@web-01 ~]# systemctl start nginx [root@web-01 ~]# curl 192.168.110.33 This is web-01 page IP=192.168.110.33
[root@web-02 ~]# mkdir -p /nginx/web [root@web-02 ~]# echo "This is web-02 page IP=`hostname -I`" >> /nginx/web/index.html [root@web-02 ~]# vim /etc/nginx/conf.d/VirtualHost.conf server { listen 192.168.110.34:80; server_name www.web-02.com; location / { root /nginx/web; index index.html; } } [root@web-02 ~]# systemctl start nginx [root@web-02 ~]# curl 192.168.110.34 This is web-02 page IP=192.168.110.34
[root@keepalived-01 ~]# vim /etc/nginx/conf.d/proxy.conf upstream wwwPools { server 192.168.110.33:80; server 192.168.110.34:80; } server { listen 80; server_name www.proxy-01.com; location / { proxy_pass http://wwwPools; } } [root@keepalived-01 ~]# systemctl start nginx.service [root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.41; done #客户端测试 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34
[root@keepalived-02 ~]# vim /etc/nginx/conf.d/proxy.conf upstream wwwPools { server 192.168.110.33:80; server 192.168.110.34:80; } server { listen 80; server_name www.proxy-02.com; location / { proxy_pass http://wwwPools; } } [root@keepalived-02 ~]# systemctl start nginx [root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.42; done This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34
[root@keepalived-01 ~]# vim /etc/keepalived/keepalived.conf #打开文件后把里面内容全删了,然后自己写 ! Configuration File for keepalived global_defs { router_id nginx_web-01 } vrrp_script chk_nginx { script "killall -0 nginx" } vrrp_instance nginx { state MASTER interface ens160 virtual_router_id 51 #id为51 priority 100 #优先级为100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_nginx } virtual_ipaddress{ #VIP 192.168.110.10/24 } } [root@keepalived-01 ~]# systemctl start keepalived.service [root@keepalived-01 ~]# ip address show ens160 #VIP为192.168.110.10/24 2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:0c:29:69:8e:29 brd ff:ff:ff:ff:ff:ff inet 192.168.110.41/24 brd 192.168.110.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever inet 192.168.110.10/24 scope global secondary ens160 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe69:8e29/64 scope link noprefixroute valid_lft forever preferred_lft forever
[root@keepalived-02 ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { router_id nginx_web-02 } vrrp_script chk_haproxy { script "killall -0 nginx" } vrrp_instance nginx { state BACKUP interface ens160 virtual_router_id 51 priority 80 #优先级为80 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_nginx } virtual_ipaddress{ 192.168.110.10/24 } } [root@keepalived-02 ~]# systemctl start keepalived.service [root@keepalived-02 ~]# ip address show ens160 #没有VIP 2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:0c:29:90:3f:85 brd ff:ff:ff:ff:ff:ff inet 192.168.110.42/24 brd 192.168.110.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe90:3f85/64 scope link noprefixroute valid_lft forever preferred_lft forever
[root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.10; done This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34
[root@keepalived-01 ~]# systemctl stop keepalived.service root@keepalived-01 ~]# ip address show ens160 #VIP发生漂移 2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:0c:29:69:8e:29 brd ff:ff:ff:ff:ff:ff inet 192.168.110.41/24 brd 192.168.110.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe69:8e29/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@keepalived-02 ~]# ip address show ens160 #VIP到keepalived-02 2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:0c:29:90:3f:85 brd ff:ff:ff:ff:ff:ff inet 192.168.110.42/24 brd 192.168.110.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever inet 192.168.110.10/24 scope global secondary ens160 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe90:3f85/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.10; done #访问正常 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34 This is web-01 page IP=192.168.110.33 This is web-02 page IP=192.168.110.34
[root@web-01 ~]# systemctl stop nginx.service [root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.10; done #都有web-02提供服务 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34
[root@keepalived-01 ~]# systemctl stop nginx.service [root@client ~]# for ((i=1;i<=6;i++)) do curl http://192.168.110.10; done This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34 This is web-02 page IP=192.168.110.34
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