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1、我直接使用安装命令安装

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

但是遇到如下报错信息

# Executing docker install script, commit: 3d8fe77c2c46c5b7571f94b42793905e5b3e42e4+ sh -c 'yum install -y -q yum-utils'+ sh -c 'yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo'Adding repo from: https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo+ '[' stable '!=' stable ']'+ sh -c 'yum makecache'CentOS-8 - AppStream                                                                               947  B/s | 4.3 kB     00:04    CentOS-8 - Base                                                                                    3.7 kB/s | 3.9 kB     00:01    CentOS-8 - Extras                                                                                   61  B/s | 1.5 kB     00:25    Docker CE Stable - x86_64                                                                          1.2 kB/s | 9.2 kB     00:07    Metadata cache created.+ '[' -n '' ']'+ sh -c 'yum install -y -q docker-ce'Error:  Problem: problem with installed package podman-1.6.4-10.module_el8.2.0+305+5e198a41.x86_64  - package podman-1.6.4-10.module_el8.2.0+305+5e198a41.x86_64 requires runc >= 1.0.0-57, but none of the providers can be installed  - package podman-2.0.5-5.module_el8.3.0+512+b3b58dca.x86_64 requires runc >= 1.0.0-57, but none of the providers can be installed  - package containerd.io-1.4.3-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.0-65.rc10.module_el8.2.0+305+5e198a41.x86_64  - package containerd.io-1.4.3-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.0-65.rc10.module_el8.2.0+305+5e198a41.x86_64  - package containerd.io-1.4.3-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.0-68.rc92.module_el8.3.0+475+c50ce30b.x86_64  - package containerd.io-1.4.3-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.0-68.rc92.module_el8.3.0+475+c50ce30b.x86_64  - package docker-ce-3:20.10.3-3.el8.x86_64 requires containerd.io >= 1.4.1, but none of the providers can be installed  - cannot install the best candidate for the job  - package runc-1.0.0-64.rc10.module_el8.3.0+479+69e2ae26.x86_64 is filtered out by modular filtering

这是因为CentOS 8中默认安泽了podman，与Docker冲突。

yum install --allowerasing docker-ce

安装过程中，我们可以看到

其中，自动卸载了podman。直到出现Complete！完成安装~~~~

systemctl start docker

4、查看docker状态

systemctl status docker

systemctl enable docker.service

成功后，我们可以重启linux，输入reboot，启动成功后，发现docker仍是运行状态。

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