部署Docker（Ubuntu）

前提条件

• 请在“/etc/apt/sources.list”文件中的检查源是否正确，如果没有配置源，请配置可用的源。
• 用户也可以登录源链接，根据现场操作系统架构和版本，进入对应操作系统目录，单击打开“source.list”文件，将文件内源链接复制到服务器“/etc/apt/sources.list”文件中，要包含Docker-ce相关的源（如“deb https://mirrors.huaweicloud.com/docker-ce/linux/ubuntu/ focal stable”，该源仅为示例）。

安装Docker

1. 以root用户登录服务器，配置信任Docker的GPG公钥，命令如下：

   curl -fsSL https://repo.huaweicloud.com/docker-ce/linux/debian/gpg | sudo apt-key add -

2. 执行以下命令，更新源并安装Docker。

   apt-get update 
   apt-get install -y docker-ce

   如果执行apt-get update命令时，出现类似如下所示报错，则执行apt-get update --allow-unauthenticated命令。

   Err:1 https://repo.huaweicloud.com/docker-ce/linux/ubuntu focal InRelease  Temporary failure resolving 'repo.huaweicloud.com'
   Err:2 https://mirrors.huaweicloud.com/ubuntu-ports focal InRelease  Temporary failure resolving 'mirrors.huaweicloud.com'
   Err:3 https://mirrors.huaweicloud.com/ubuntu-ports focal-updates InRelease Temporary failure resolving 'mirrors.huaweicloud.com'
   Err:4 https://mirrors.huaweicloud.com/ubuntu-ports focal-security InRelease Temporary failure resolving 'mirrors.huaweicloud.com'
   Err:5 https://mirrors.huaweicloud.com/docker-ce/linux/ubuntu focal InRelease Temporary failure resolving 'mirrors.huaweicloud.com'
   Reading package lists... Done
   N: Ignoring file 'index.html' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
   W: Failed to fetch https://mirrors.huaweicloud.com/ubuntu-ports/dists/focal/InRelease  Temporary failure resolving 'mirrors.huaweicloud.com'
   W: Failed to fetch https://mirrors.huaweicloud.com/ubuntu-ports/dists/focal-updates/InRelease  Temporary failure resolving 'mirrors.huaweicloud.com'
   W: Failed to fetch https://mirrors.huaweicloud.com/ubuntu-ports/dists/focal-security/InRelease  Temporary failure resolving 'mirrors.huaweicloud.com'
   W: Failed to fetch https://mirrors.huaweicloud.com/docker-ce/linux/ubuntu/dists/focal/InRelease  Temporary failure resolving 'mirrors.huaweicloud.com'
   W: Failed to fetch https://repo.huaweicloud.com/docker-ce/linux/ubuntu/dists/focal/InRelease  Temporary failure resolving 'repo.huaweicloud.com'
   W: Some index files failed to download. They have been ignored, or old ones used instead.

3. 执行systemctl start docker命令启动Docker。
4. 执行docker version命令查看Docker是否已启动，如显示以下信息表示Docker已安装并启动。

   Client: Docker Engine - Community
    Version:           20.10.7
    API version:       1.41
    Go version:        go1.18.7
    Git commit:        baeda1f
    Built:             Tue Oct 30 19:55:49 2021
    OS/Arch:           linux/arm64
    Context:           default
    Experimental:      true
   
   Server: Docker Engine - Community
    Engine:
     Version:          20.10.7
     API version:      1.41 (minimum version 1.12)
     Go version:       go1.13.8
     Git commit:       20.10.7-Oubuntu5~18.04.3
     Built:            Fri Oct 22 19:54:13 2021
     OS/Arch:          linux/arm64
     Experimental:     false
    containerd:
     Version:          1.6.10
     GitCommit:        770bd0108c32f3fb5c73ae1264f7e503fe7b2661
    runc:
     Version:          1.1.4
     GitCommit:        v1.1.4-0-g5fd4c4d
    docker-init:
     Version:          0.19.0
     GitCommit:        de40ad0