Rocky Linux9下安装Docker和卸载Docker

前提条件

安装好Rocky Linux9，可参考 Vmware下安装Rocky Linux9.4

安装Docker

精简版命令

yum install -y yum-utils

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum install -y docker-ce

systemctl enable docker --now

mkdir -p /etc/docker

tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn"
  ]
}
EOF

systemctl daemon-reload

systemctl restart docker

docker version

docker info

docker run hello-world

详细操作过程

安装必要的包

[root@localhost ~]# yum install -y yum-utils
Last metadata expiration check: 0:25:51 ago on Mon Sep  9 15:49:04 2024.
Package yum-utils-4.3.0-13.el9.noarch is already installed.
Dependencies resolved.
Nothing to do.
Complete!

添加docker-ce repo

[root@localhost ~]# 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

安装docker-ce

[root@localhost ~]# yum install -y docker-ce
...
省略日志输出
...

设置开机自动启动docker及启动docker

[root@localhost ~]# systemctl enable docker --now

配置国内镜像加速，这里配置三个镜像加速地址，根据需要可以添加更多镜像地址

[root@localhost ~]# mkdir -p /etc/docker
[root@localhost ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn"
  ]
}
EOF
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn"
  ]
}

重新加载配置及重启docker

[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl restart docker

查看docker版本信息

[root@localhost ~]# docker version
Client: Docker Engine - Community
 Version:           27.2.0
 API version:       1.47
 Go version:        go1.21.13
 Git commit:        3ab4256
 Built:             Tue Aug 27 14:17:06 2024
 OS/Arch:           linux/amd64
 Context:           default
​
Server: Docker Engine - Community
 Engine:
  Version:          27.2.0
  API version:      1.47 (minimum version 1.24)
  Go version:       go1.21.13
  Git commit:       3ab5c7d
  Built:            Tue Aug 27 14:15:14 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.7.21
  GitCommit:        472731909fa34bd7bc9c087e4c27943f9835f111
 runc:
  Version:          1.1.13
  GitCommit:        v1.1.13-0-g58aa920
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

查看docker信息

[root@localhost ~]# docker info
Client: Docker Engine - Community
 Version:    27.2.0
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.16.2
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.29.2
    Path:     /usr/libexec/docker/cli-plugins/docker-compose
​
Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 27.2.0
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: runc io.containerd.runc.v2
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 472731909fa34bd7bc9c087e4c27943f9835f111
 runc version: v1.1.13-0-g58aa920
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 5.14.0-427.33.1.el9_4.x86_64
 Operating System: Rocky Linux 9.4 (Blue Onyx)
 OSType: linux
 Architecture: x86_64
 CPUs: 4
 Total Memory: 3.543GiB
 Name: localhost.localdomain
 ID: 24d90a1d-c5bf-41c9-862e-cab401d7b832
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://registry.docker-cn.com/
  http://hub-mirror.c.163.com/
  https://docker.mirrors.ustc.edu.cn/
 Live Restore Enabled: false
​
[root@localhost ~]# 
​

验证docker是否可用

下载一个 “hello-world” 测试镜像并在容器中运行它，当容器运行时，它会打印确认消息并退出。

[root@localhost ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
c1ec31eb5944: Pull complete 
Digest: sha256:53cc4d415d839c98be39331c948609b659ed725170ad2ca8eb36951288f81b75
Status: Downloaded newer image for hello-world:latest
​
Hello from Docker!
This message shows that your installation appears to be working correctly.
​
To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.
​
To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash
​
Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/
​
For more examples and ideas, visit:
 https://docs.docker.com/get-started/
​
[root@localhost ~]# 
​

提示：网络的原因可能需要多尝试几次才能下载成功，如果下载不了，还可以尝试添加更多可用镜像。

卸载docker

卸载docker命令

[root@localhost ~]# yum remove -y docker-ce

删除docker相关文件

主机上的镜像、容器、卷或自定义配置文件不会自动删除，使用如下命令删除所有的镜像、容器和卷。

[root@localhost ~]# rm -rf /var/lib/docker
[root@localhost ~]# rm -rf /var/lib/containerd

完成！enjoy it！