Docker|Centos8.2轻松安装docker centos8.2|docker安装

step 1:安装一些必要的工具

sudo yum install -y yum-utils device-mapper-persistent-data lvm2
step 2:添加软件源信息

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Step 3: 更新 Docker-CE

sudo yum makecache fast

错误: yum makecache: error: argument timer: invalid choice: ‘fast’ (choose from ‘timer’)

问题: ‘索引的时候出错，即centos8没有该参数，解决办法为：去掉fast参数’

命令改成: sudo yum makecache

再次执行: sudo yum makecache

Step 4: 安装 Docker-CE

sudo yum -y install docker-ce

报错: Problem: package docker-ce-3:19.03.12-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed;

根据提示，需要containerd.io的版本 >= 1.2.2-3，操作如下：

安装wget指令 yum install wget;

获取rpm包 wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm;

升级containerd.io（安装rpm包） yum -y install containerd.io-1.2.6-3.3.el7.x86_64.rpm;

再次执行 sudo yum -y install docker-ce;

Step 5: 开启Docker服务
- 启动1: sudo service docker start
- 启动2: sudo systemctl start docker
Step 6: 安装效验
- docker version
- sudo docker ps
设置开机自启动
sudo systemctl enable docker
重启生效
systemctl restart docker.service