Docker centos 官方安装教程：docker for centos
- 卸载旧的
$ sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
2.设置存储库
安装 yum-utils软件包（提供 yum-config-manager实用程序）并设置稳定的存储库。
$ sudo yum install -y yum-utils
$ sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
3.启用测试
$ sudo yum-config-manager --enable docker-ce-nightly
4.开始安装：
$ sudo yum install docker-ce docker-ce-cli containerd.io
- containerd.io – daemon to interface with the OS API (in this case, LXC – Linux Containers), essentially decouples Docker from the OS, also provides container services for non-Docker container managers
- docker-ce – Docker daemon, this is the part that does all the management work, requires the other two on Linux
- docker-ce-cli – CLI tools to control the daemon, you can install them on their own if you want to control a remote Docker daemon
这个地方遇到了错误
提示需要 containerd.io并且版本大于1.2.2-3，但是找不到，下面手动安装
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io
-1.2.6-3.3.fc
c30.x86_64.rpm
Last metadata expiration check: 0:09:53 ago on Thu 30 Apr 2020 11:49:45 AM CST.
containerd.io-1.2.6-3.3.fc30.x86_64.rpm [=== ] --- B/s | 0 B --:-- ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm [=== ] --- B/s | 0 B --:-- ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 0% [ ] --- B/s | 0 B --:-- ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 0% [ ] 409 kB/s | 148 kB 00:53 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 3% [= ] 479 kB/s | 676 kB 00:44 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 8% [=== ] 675 kB/s | 1.8 MB 00:29 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 15% [====== ] 955 kB/s | 3.3 MB 00:19 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 24% [=========- ] 1.2 MB/s | 5.3 MB 00:12 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 31% [============- ] 1.4 MB/s | 6.8 MB 00:10 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 46% [==================- ] 2.0 MB/s | 9.9 MB 00:05 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 49% [===================- ] 2.0 MB/s | 11 MB 00:05 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 64% [=========================- ] 2.5 MB/s | 14 MB 00:02 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 70% [============================ ] 2.6 MB/s | 15 MB 00:02 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 77% [==============================- ] 2.7 MB/s | 17 MB 00:01 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 91% [====================================- ] 3.1 MB/s | 20 MB 00:00 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 95% [====================================== ] 3.0 MB/s | 20 MB 00:00 ETA
containerd.io-1.2.6-3.3.fc30.x86_64.rpm 3.8 MB/s | 21 MB 00:05
Dependencies resolved.
========================================================================================================================
Package Architecture Version Repository Size
========================================================================================================================
Installing:
containerd.io x86_64 1.2.6-3.3.fc30 @commandline 21 M
Installing dependencies:
container-selinux noarch 2:2.124.0-1.module_el8.1.0+298+41f9343a AppStream 47 k
Enabling module streams:
container-tools rhel8
Transaction Summary
========================================================================================================================
Install 2 Packages
Total size: 21 M
Total download size: 47 k
Installed size: 84 M
Is this ok [y/N]: y
Downloading Packages:
container-selinux-2.124.0-1.module_el8.1 0% [ ] --- B/s | 0 B --:-- ETA
container-selinux-2.124.0-1.module_el8.1.0+298+41f9343a.noarch.rpm 1.1 MB/s | 47 kB 00:00
Total 11 MB/s | 64 MB 00:0...............................................省略
Installed:
docker-ce-3:19.03.8-3.el7.x86_64 libcgroup-0.41-19.el8.x86_64 docker-ce-cli-1:19.03.8-3.el7.x86_64
Complete!
OK 安装完成.
如上所示，注意要先安装依赖选项再安装会保险些.
总结：CentOS8 安装Docker六部曲
1.删除旧版本
$ sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
2.安装yum工具并设置存储库
$ sudo yum install -y yum-utils
$ sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
3.安装containerd.io（自动安装找不到路径，这里强制设置安装下载地址）
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
4.安装Docker CE 和Docker ce-cli
sudo yum install docker-ce docker-ce-cli
5.启动Docker
sudo systemctl start docker
6.通过运行 hello-world 映像来验证是否正确安装了Docker Engine 。
sudo docker run hello-world
补充：
7.开启服务自启动
systemctl enable docker.service
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
其它：
查看docker版本
docker version
Client: Docker Engine - Community
Version: 19.03.8
API version: 1.40
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:27:04 2020
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.8
API version: 1.40 (minimum version 1.12)
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:25:42 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.2.6
GitCommit: 894b81a4b802e4eb2a91d1ce216b8817763c29fb
runc:
Version: 1.0.0-rc8
GitCommit: 425e105d5a03fabd737a126ad93d62a9eeede87f
docker-init:
Version: 0.18.0
GitCommit: fec3683
Original: https://www.cnblogs.com/merray/p/12807930.html
Author: Merray
Title: CentOS上安装Docker
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