安装docker

一、基于yum方式安装docker:

(1)卸载旧版本的docker环境

 yum -y remove docker \
           docker-client \
           docker-client-latest \
           docker-common \
           docker-latest \
           docker-latest-logrotate \
           docker-logrotate \
           docker-engine    

(2)添加docker的软件源

curl -o /etc/yum.repos.d/docker-ce.repo  https://download.docker.com/linux/centos/docker-ce.repo       

(3)安装docker-ce软件包

yum -y install docker-ce docker-ce-cli containerd.io docker-compose-plugin

(4)启动docker服务并设置开机自启动

 systemctl --now enable docker 

(5)查看docker的版本信息

docker version

二、基于二进制安装docker

(1)下载docker二进制软件包

yum -y install wget
wget https://download.docker.com/linux/static/stable/x86_64/docker-19.03.15.tgz

(2)解压二进制文件

tar xf docker-19.03.15.tgz && mv docker/* /usr/local/bin && rm -rf docker

(3)编写启动脚本

cat > /usr/lib/systemd/system/docker.service <<EOF
[Unit]
Description= Docker Application Container Engine

[Service]
Type=simple
ExecStart=/usr/local/bin/dockerd

[Install]
WantedBy=multi-user.target
EOF

(4)启动docker服务并设置开机自启动

systemctl daemon-reload
systemctl enable --now docker

(5)检查docker版本

[root@docker ~]# docker -v
Docker version 19.03.15, build 99e3ed8

二进制安装脚本

[root@docker ~]# cat install_binary_docker.sh 
#!/bin/bash

# DOCKER_VERSION=19.03.15
DOCKER_VERSION=20.10.23
URL=https://download.docker.com
# URL=https://mirrors.tuna.tsinghua.edu.cn
# URL=https://mirrors.aliyun.com

ARCH=x86_64

function prepare {

   # 判断是否下载wget，若不存在则下载wget
   [ -f /usr/bin/wget ] || yum -y install wget
   # 判断是否下载docker软件包，若不存在则下载即可
   [ -f docker-${DOCKER_VERSION}.tgz ] || wget ${URL}/linux/static/stable/${ARCH}/docker-${DOCKER_VERSION}.tgz
}


function install {

   # 安装docker环境
   tar xf docker-${DOCKER_VERSION}.tgz && mv docker/* /usr/local/bin && rm -rf docker
   # 编写启动脚本
   cat > /usr/lib/systemd/system/docker.service <<EOF
[Unit]
Description= Docker Application Container Engine
[Service]
Type=simple
ExecStart=/usr/local/bin/dockerd

[Install]
WantedBy=multi-user.target
EOF

   # 启动docker服务并检查版本
systemctl daemon-reload
systemctl enable --now docker
sleep 3
docker version
}

prepare
install

[root@docker ~]# bash install_binary_docker.sh 

三、docker-compose安装

可以自己选择版本进行更换
http://mirror.azure.cn/docker-toolbox/linux/compose/

# 从微软镜像下载docker-compose安装
curl -L http://mirror.azure.cn/docker-toolbox/linux/compose/v2.15.0/docker-compose-linux-x86_64 -o /usr/local/bin/docker-compose
# 设置权限
chmod +x /usr/local/bin/docker-compose

四、自动补全功能：

yum -y install bash-completion
source /usr/share/bash-completion/bash_completion

五、docker镜像加速:

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://tuv7rqqq.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker