一文搞懂Docker与Docker Engine的安装

CentOS 7.5
CentOS-extras库必须启用
Docker 19.03.8

[root@localhost ~]# vim /etc/yum.repos.d/CentOS-Base.repo
...
[extras]         //extras模块
name=CentOS-$releasever - Extras
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
#baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
gpgcheck=1
enabled=1  //调整为1表示打开
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[root@localhost ~]# yum remove docker \
                               docker-client \
                               docker-client-latest \
                               docker-common \
                               docker-latest \
                               docker-latest-logrotate \
                               docker-logrotate \
                               docker-engine

[root@localhost ~]# yum install -y yum-utils  device-mapper-persistent-data  lvm2
[root@localhost ~]# yum-config-manager --add-repo \
      https://download.docker.com/linux/centos/docker-ce.repo     //设置docker仓库

[root@localhost ~]# yum install docker-ce docker-ce-cli containerd.io

[root@localhost ~]# yum list docker-ce --showduplicates | sort -r
docker-ce.x86_64            18.03.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            18.03.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.12.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.12.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.09.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.09.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.2.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.0.ce-1.el7.centos

[root@localhost ~]# systemctl start docker

[root@localhost ~]# docker run hello-world
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/
For more examples and ideas, visit:
 https://docs.docker.com/get-started/

[root@localhost ~]# yum install -y docker-ce-19.03.8-3.el7.x86_64.rpm
[root@localhost ~]# systemctl start docker
[root@localhost ~]# docker run hello-world

#!/bin/bash
# 移除掉旧的版本
sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine
# 删除所有旧的数据
sudo rm -rf /var/lib/docker
#  安装依赖包
sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2
# 添加源，使用了阿里云镜像
sudo yum-config-manager \
    --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 配置缓存
sudo yum makecache fast
# 安装最新稳定版本的docker
sudo yum install -y docker-ce
# 配置阿里云镜像加速器 ----》（需要根据自己阿里云账户的加速地址改一下）
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
 "registry-mirrors": ["https://xxxxx.mirror.aliyuncs.com"]
}
EOF
# 启动docker引擎并设置开机启动
sudo systemctl start docker
sudo systemctl enable docker
# 配置当前用户对docker的执行权限
sudo groupadd docker
sudo gpasswd -a ${USER} docker
sudo systemctl restart docker

[root@localhost ~]# yum remove docker-ce docker-ce-cli containerd.io

[root@localhost ~]# rm -rf /var/lib/docker