1.卸载旧版
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine \
docker-selinux
2.配置Docker的yum库
2.1.首先要安装一个yum工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
2.2.配置Docker的yum源
安装成功后,执行命令,配置Docker的yum源(已更新为阿里云源)
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
2.3.更新yum,建立缓存
sudo yum makecache fast
2.4.安装Docker
yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
3.启动和校验
# 启动Docker
systemctl start docker
# 停止Docker
systemctl stop docker
# 重启
systemctl restart docker
# 设置开机自启
systemctl enable docker
# 执行docker ps命令,如果不报错,说明安装启动成功
docker ps
4.配置镜像加速
镜像地址可能会变更,如果失效可以百度找最新的docker镜像。
配置镜像步骤如下:
# 创建目录
mkdir -p /etc/docker
# 复制内容
tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": [
"http://hub-mirror.c.163.com",
"https://mirrors.tuna.tsinghua.edu.cn",
"http://mirrors.sohu.com",
"https://ustc-edu-cn.mirror.aliyuncs.com",
"https://ccr.ccs.tencentyun.com",
"https://docker.m.daocloud.io",
"https://docker.awsl9527.cn"
]
}
EOF
# 重新加载配置
systemctl daemon-reload
# 重启Docker
systemctl restart docker
5.命令别名
给常用Docker命令起别名,方便我们访问:
# 修改/root/.bashrc文件
vi /root/.bashrc
内容如下:
# .bashrc
# User specific aliases and functions
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
alias dps='docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Ports}}\t{{.Status}}\t{{.Names}}"'
alias dis='docker images'
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi