1.系统信息：CentOS 系统的内核版本高于 3.10
[root@test_host ~]# uname -a Linux test_host 3.10.0-1127.19.1.el7.x86_64 #1 SMP Tue Aug 25 17:23:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux2.更新yum包到最新
```bash [root@test_host ~]# yum update Loaded plugins: fastestmirror, langpacks Determining fastest mirrors epel | 4.7 kB 00:00:00 extras | 2.9 kB 00:00:00 os | 3.6 kB 00:00:00 updates | 2.9 kB 00:00:00 (1/3): epel/7/x86_64/updateinfo | 1.0 MB 00:00:00 (2/3): updates/7/x86_64/primary_db | 4.7 MB 00:00:01 (3/3): epel/7/x86_64/primary_db | 6.9 MB 00:00:01 Resolving Dependencies --> Running transaction check ---> Package NetworkManager.x86_64 1:1.18.4-3.el7 will be updated3.准备一些会用到的系统工具
[root@test_host ~]# yum install -y yum-utils device-mapper-persistent-data lvm2 Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version Package device-mapper-persistent-data-0.8.5-3.el7_9.2.x86_64 already installed and latest version Package 7:lvm2-2.02.187-6.el7_9.3.x86_64 already installed and latest version Nothing to do4.设置镜像仓库，这里用阿里云的
[root@test_host ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo Loaded plugins: fastestmirror, langpacks adding repo from: http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo grabbing file http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo repo saved to /etc/yum.repos.d/docker-ce.repo5.更新yum 软件包索引
[root@test_host ~]# yum makecache fast Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile docker-ce-stable | 3.5 kB 00:00:00 epel | 4.7 kB 00:00:00 extras | 2.9 kB 00:00:00 os | 3.6 kB 00:00:00 updates | 2.9 kB 00:00:00 (1/2): docker-ce-stable/x86_64/primary_db | 51 kB 00:00:00 (2/2): docker-ce-stable/x86_64/updateinfo | 55 B 00:00:00 Metadata Cache Created6.安装最新Docker CE版本
[root@test_host ~]# yum install docker-ce Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Resolving Dependencies --> Running transaction check ---> Package docker-ce.x86_64 3:20.10.1-3.el7 will be installed --> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.1-3.el7.x86_64 --> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.1-3.el7.x86_64 --> Processing Dependency: docker-ce-cli for package: 3:docker-ce-20.10.1-3.el7.x86_64 --> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.1-3.el7.x86_64 --> Processing Dependency: libcgroup for package: 3:docker-ce-20.10.1-3.el7.x86_64 --> Running transaction check7.Docker 启动配置
[root@test_host ~]# systemctl start docker [root@test_host ~]# systemctl enable docker Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.8.Docker 版本查看
[root@test_host ~]# docker version Client: Docker Engine - Community Version: 20.10.1 API version: 1.41 Go version: go1.13.15 Git commit: 831ebea Built: Tue Dec 15 04:37:17 2020 OS/Arch: linux/amd64 Context: default Experimental: true Server: Docker Engine - Community Engine: Version: 20.10.1 API version: 1.41 (minimum version 1.12) Go version: go1.13.15 Git commit: f001486 Built: Tue Dec 15 04:35:42 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.4.3 GitCommit: 269548fa27e0089a8b8278fc4fc781d7f65a939b runc: Version: 1.0.0-rc92 GitCommit: ff819c7e9184c13b7c2607fe6c30ae19403a7aff docker-init: Version: 0.19.0 GitCommit: de40ad09.测试一下Docker是否可用
[root@test_host ~]# docker container run -it centos:6 Unable to find image 'centos:6' locally 6: Pulling from library/centos ff50d722b382: Pull complete Digest: sha256:dec8f471302de43f4cfcf82f56d99a5227b5ea1aa6d02fa56344986e1f4610e7 Status: Downloaded newer image for centos:6 [root@8772f16deba4 /]# cat /etc/redhat-release CentOS release 6.10 (Final)