Centos 7 安装docker

一、进入yum.repos.d 目录

cd /etc/yum.repos.d/

二、下载清华大学仓库文件：Index of /docker-ce/linux/centos/ | 清华大学开源软件镜像站 | Tsinghua Open Source Mirror

​

wget https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo

三、编辑docker-ce.repo 文件，替换清华仓库

​

vim docker-ce.repo
:%s@https://download.docker.com/@https://mirrors.tuna.tsinghua.edu.cn/docker-ce/@

四、显示所有仓库，看看是否有docker

yum repolist

​

五、 安装docker-ce

yum install -y docker-ce --allowerasing 

ps:安装出现问题，

安装时若出现以下错误，根据提示在命令结尾加上--allowerasing或--nobest后再次执行即可  

六、启动docker，并设置开机启动docker服务

systemctl start docker && systemctl enable docker

七、配置镜像加速

docker程序环境：
环境配置文件：
/etc/sysconfig/docker-network
/etc/sysconfig/docker-storage
/etc/sysconfig/docker
Unit File：
/usr/lib/systemd/system/docker.service
Docker Registry配置文件：
/etc/containers/registries.conf
docker-ce:
配置文件：/etc/docker/daemon.json

vim /etc/docker/daemon.json

{
"registry-mirrors": ["https://registry.docker-cn.com"]
}

八、查看docker版本

docker -v

[root@localhost docker]# docker version
Client: Docker Engine - Community
 Version:           20.10.8
 API version:       1.41
 Go version:        go1.16.6
 Git commit:        3967b7d
 Built:             Fri Jul 30 19:53:39 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:52:00 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.9
  GitCommit:        e25210fe30a0a703442421b0f60afac609f950a3
 runc:
  Version:          1.0.1
  GitCommit:        v1.0.1-0-g4144b63
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

查看docker详细信息

[root@localhost docker]# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.6.1-docker)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 2
 Server Version: 20.10.8
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: e25210fe30a0a703442421b0f60afac609f950a3
 runc version: v1.0.1-0-g4144b63
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 4.18.0-240.10.1.el8_3.x86_64
 Operating System: CentOS Linux 8
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 780.9MiB
 Name: localhost.localdomain
 ID: K7MP:KV4G:F3KD:D4MQ:R6X5:EVVZ:CJDE:WJT4:ILZH:ORBN:H7UH:LRGW
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false