Docker 安装部署（三）

本次部署示例为 CentOS 7 ，其他系统部署参考[这里](Install Docker Engine | Docker Documentation)。

一、基础环境

可以连接网络的 CentOS 7
官方文档：Install Docker Engine on CentOS | Docker Documentation

二、Docker 部署

1、设置仓库

（1）yum-utils 包安装

1	yum install -y yum-utils

（2）设置 stable 镜像仓库

可以使用国内仓库，也可以使用Docker 国外官方仓库，这里推荐使用国内镜像仓库，国外的可能由于网络等原因导致报错。

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# 国内镜像仓库设置

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

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# 国外镜像仓库设置

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

2、更新 yum 软件包索引

1	yum makecache fast

3、安装 docker Engine

1	yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y

4、启动 docker

1	systemctl start docker

三、验证

1、版本查看

使用 docker version 命令，有以下输出则安装成功。

[root@localhost ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.17
 API version:       1.41
 Go version:        go1.17.11
 Git commit:        100c701
 Built:             Mon Jun  6 23:05:12 2022
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.17
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.17.11
  Git commit:       a89b842
  Built:            Mon Jun  6 23:03:33 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.6
  GitCommit:        10c12954828e7c7c9b6e0ea9b0c02b01407d3ae1
 runc:
  Version:          1.1.2
  GitCommit:        v1.1.2-0-ga916309
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

2、容器运行测试

运行容器 hello-world ，出现以下信息，则说明 Docker 环境安装成功。

[root@localhost ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:13e367d31ae85359f42d637adf6da428f76d75dc9afeb3c21faea0d976f5c651
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/