RedHat系统安装Docker_redhat 安装docker

1、系统要求

1.1、RedHat版本

系统版本：7.6

备注：系统版本>=7.6

2、软件要求

2.1、Docker版本

软件版本：20.10.14

备注：软件版本>=20.10.14

3、安装步骤

3.1、本地安装，下载软件

手动下载：docker-20.10.14.tgz

在线下载：wget  https://download.docker.com/linux/static/stable/x86_64/docker-20.10.14.tgz

将文件上传或下载到指定目录：如/usr/local/soft/

3.2、解压

进入指定目录：如/usr/local/soft/docker-20.10.14.tgz 

解压操作：tar -xvf  docker-20.10.14.tgz

3.3、拷贝命令

cp docker/* /usr/bin/

3.4、注册服务

vi /etc/systemd/system/docker.service
chmod +x /etc/systemd/system/docker.service

docker.service文件内容：

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
ExecReload=/bin/kill -s HUP $MAINPID

# 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

# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0

# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes

# kill only the docker process, not all processes in the cgroup
KillMode=process

# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target 

3.5、重载docker.service文件

进入目录：/etc/systemd/system/

执行：systemctl daemon-reload   

3.6、启动Docker并设置开机自启

systemctl start docker       
systemctl enable docker.service 

3.7、验证

docker run hello-world

出现下面页面，表示安装成功