centOs云服务器安装Docker

centOs云服务器安装Docker

单词：

Docker 官网 查询文档:

• 进入官网： https://www.docker.com/

官网文档目录：

├── Docker官网
|   ├── Developers
|       ├── Docs
|            ├── Manuals
|                ├── Docker Engine
|                    ├── Install
|                        ├── Install On CentOS
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安装步骤：1-5

1.更新yum;

sudo yum update
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2. Uninstall old versions[移除旧有Docker]

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them, along with associated dependencies.

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine
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It’s OK if yum reports that none of these packages are installed.

3. Install using the repository

Before you install Docker Engine for the first time on a new host machine, you need to set up the Docker repository. Afterward, you can install and update Docker from the repository.

Set up the repository

Install the yum-utils package (which provides the yum-config-manager utility) and set up the repository.

$ sudo yum install -y yum-utils

$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
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4. Install Docker Engine[ 两种安装方式—1. 直接装载最新版本 2. 查询安装特定版本]

(1) Install the latest version of Docker Engine:

 sudo yum install docker-ce docker-ce-cli containerd.io docker-compose-plugin
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This command installs Docker, but it doesn’t start Docker. It also creates a docker group, however, it doesn’t add any users to the group by default.

(2) To install a specific version of Docker Engine

(2)-1. 列出所有可用版本;

yum list docker-ce --showduplicates | sort -r

docker-ce.x86_64  3:18.09.1-3.el7                     docker-ce-stable
docker-ce.x86_64  3:18.09.0-3.el7                     docker-ce-stable
docker-ce.x86_64  18.06.1.ce-3.el7                    docker-ce-stable
docker-ce.x86_64  18.06.0.ce-3.el7                    docker-ce-stable
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参数：

docker-ce : docker community edition 社区版本;

sort -r ： 降序排列

The list returned depends on which repositories are enabled, and is specific to your version of CentOS

(2)-2. 添加参数, 直接安装特定版本;

sudo yum install docker-ce- docker-ce-cli- containerd.io docker-compose-plugin
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This command installs Docker, but it doesn’t start Docker. It also creates a docker group, however, it doesn’t add any users to the group by default.

5. Start Docker

sudo systemctl start docker
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6. 查询Docker 状态

sudo systemctl status docker
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