CentOS 7 安装 Docker CE

1、安装 docker-ce

// 安装 docker 依赖
# yum install -y yum-utils device-mapper-persistent-data lvm2
// 配置 docker yum 源为阿里云 yun 源
# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# yum makecache fast
# yum -y install docker-ce
# systemctl start docker
# systemctl enable docker
# docker -v
Docker version 18.03.1-ce, build 9ee9f40

2、配置 docker 镜像源加速器

// 当 Docker Version >= 1.10 时，使用配置文件 /etc/docker/daemon.json（没有时新建该文件）

# cat >> /etc/docker/daemon.json <<EOF

{

  "registry-mirrors": ["[https://4wvlvmti.mirror.aliyuncs.com"](https://4wvlvmti.mirror.aliyuncs.com/)]

}

EOF

# systemctl daemon-reload

# systemctl restart docker

// 当 Docker Version < 1.10 时，修改配置文件 /etc/sysconfig/docker 和 /usr/lib/systemd/system/docker.service

# echo "OPTIONS='--registry-mirror=[https://4wvlvmti.mirror.aliyuncs.com'"](https://4wvlvmti.mirror.aliyuncs.com%27/) >> /etc/sysconfig/docker

# sed -i '/ExecStart/i\EnvironmentFile=-/etc/sysconfig/docker/' /usr/lib/systemd/system/docker.service

# sed -i 's#ExecStart=/usr/bin/dockerd#ExecStart=/usr/bin/dockerd $OPTIONS#g' /usr/lib/systemd/system/docker.service

// 修改后的配置文件

# 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

# 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

EnvironmentFile=-/etc/sysconfig/docker/

ExecStart=/usr/bin/dockerd $OPTIONS

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

# systemctl daemon-reload

# systemctl restart docker