docker安装

搭建docker所需环境

1.在线搭建docker

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager –add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
刷新一下缓存
sudo yum makecache fast
yum list docker-ce --showduplicates | sort -r
yum install docker

2.离线安装

https://link.zhihu.com/?target=https%3A//download.docker.com/linux/static/stable/x86_64/docker-20.10.6.tgz
记得修改一下自己对应docker版本号
tar -zxvf docker-18.06.3-ce.tgz
cp -p docker/* /usr/bin
将docker设置为服务随着开机启动
cp docker.service /usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target docker.socket
[Service]
Type=notify
EnvironmentFile=-/run/flannel/docker
WorkingDirectory=/usr/local/bin
ExecStart=/usr/bin/dockerd \
                -H tcp://0.0.0.0:4243 \
                -H unix:///var/run/docker.sock \
                --selinux-enabled=false \
                --log-opt max-size=1g
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=on-failure
[Install]
WantedBy=multi-user.target

重启守护进程
systemctl daemon-reload
启动docker
systemctl start docker
设置开机启动docker
systemctl enable docker
查询版本号
systemctl status docker