Docker centos 官方安装教程：docker for centos
1. 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
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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
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docker-ce - Docker daemon, this is the part that does all the management work, requires the other two on Linux
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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 1.1 MB/s | 47 kB 00:00........... Installed: containerd.io-1.2.6-3.3.fc30.x86_64 container-selinux-2:2.124.0-1.module_el8.1.0+298+41f9343a.noarch Complete!
安装完成下一步继续安装Docker
sudo yum install docker-ce docker-ce-cli
其实这3个可以一个个单独安装
yum install docker-ce
# yum install docker-ce Last metadata expiration check: 0:12:39 ago on Thu 30 Apr 2020 11:49:45 AM CST. Dependencies resolved. ================================================================================================================== Package Architecture Version Repository ================================================================================================================== Installing: docker-ce x86_64 3:19.03.8-3.el7 docker-ce-stable Installing dependencies: libcgroup x86_64 0.41-19.el8 BaseOS docker-ce-cli x86_64 1:19.03.8-3.el7 docker-ce-stable Transaction Summary ================================================================================================================== Install 3 Packages Total download size: 64 M Installed size: 273 M Is this ok [y/N]: y Downloading Packages: (1/3): libcgroup-0.41-19.el8.x86_64.rpm 0% [ ] --- B/s | 0 B --:- (1/3): libcgroup-0.41-19.el8.x86_64.rpm 640 kB/s | 70 kB 00:0 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 0% [ ] 640 kB/s | 70 kB 01:4 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 0% [ ] 640 kB/s | 70 kB 01:4 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 0% [ ] 623 kB/s | 180 kB 01:4 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 2% [- ] 864 kB/s | 1.5 MB 01:1 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 5% [== ] 1.1 MB/s | 3.2 MB 00:5 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 16% [======- ] 2.5 MB/s | 11 MB 00:2 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 21% [========- ] 3.0 MB/s | 14 MB 00:1 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 29% [===========- ] 3.8 MB/s | 19 MB 00:1 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 36% [==============- ] 4.5 MB/s | 24 MB 00:0 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 39% [===============- ] 4.6 MB/s | 25 MB 00:0 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 53% [===================== ] 6.1 MB/s | 34 MB 00:0 (2-3/3): docker-ce-19.03.8-3.el7.x86_64. 56% [======================- ] 6.2 MB/s | 36 MB 00:0 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 65% [========================== ] 6.9 MB/s | 42 MB 00:0 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 71% [============================- ] 7.3 MB/s | 46 MB 00:0 (2-3/3): docker-ce-cli-19.03.8-3.el7.x86 81% [================================ ] 8.0 MB/s | 52 MB 00:0 (2/3): docker-ce-19.03.8-3.el7.x86_64.rpm 5.4 MB/s | 25 MB 00:0 (3/3): docker-ce-cli-19.03.8-3.el7.x86_6 82% [================================= ] 8.0 MB/s | 53 MB 00:0 (3/3): docker-ce-cli-19.03.8-3.el7.x86_6 85% [================================== ] 7.8 MB/s | 55 MB 00:0 (3/3): docker-ce-cli-19.03.8-3.el7.x86_6 92% [====================================- ] 8.2 MB/s | 59 MB 00:0 (3/3): docker-ce-cli-19.03.8-3.el7.x86_6 94% [=====================================- ] 7.8 MB/s | 60 MB 00:0 (3/3): docker-ce-cli-19.03.8-3.el7.x86_64.rpm 6.6 MB/s | 40 MB 00:0 ------------------------------------------------------------------------------------------------------------------ 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