Docker 安装 - 我要开始学习啦

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本文围绕自动化运维趋势展开，重点介绍了Docker的安装过程。先下载内核3.0以上的CentOS并配置yum，接着使用yum命令安装docker-engine，安装后启动并查看状态，最后设置开机自启，完成Docker的安装。

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今天和以为印度的同事聊到现在自动话运维的趋势的时候，大家聊到python,ansible, 还有就是Docker.

我开始安装一下：先下载一个内核是3.0 以上的centos, 再配置一个yum:

[root@localhost yum.repos.d]# cat docker.repo
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg

然后开始安装：

yum install -y docker-engine

安装后启动docker:

root@localhost yum.repos.d]# service docker start
Redirecting to /bin/systemctl start docker.service

看一下status:
[root@localhost yum.repos.d]# service docker status
Redirecting to /bin/systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since Thu 2019-06-20 05:31:22 EDT; 3s ago
     Docs: https://docs.docker.com
Main PID: 3924 (dockerd)
    Tasks: 16
   Memory: 17.4M
   CGroup: /system.slice/docker.service
           ├─3924 /usr/bin/dockerd
           └─3927 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-int...

Jun 20 05:31:20 localhost.localdomain systemd[1]: Starting Docker Application Container Engine...
Jun 20 05:31:20 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:20.659642193-04:00" level=info m...927"
Jun 20 05:31:21 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:21.766622307-04:00" level=info m...nds"
Jun 20 05:31:21 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:21.767776246-04:00" level=info m...rt."
Jun 20 05:31:22 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:22.025215266-04:00" level=info m...ess"
Jun 20 05:31:22 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:22.370582421-04:00" level=info m...ne."
Jun 20 05:31:22 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:22.388589933-04:00" level=info m...ion"
Jun 20 05:31:22 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:22.388626082-04:00" level=info m...0-ce
Jun 20 05:31:22 localhost.localdomain dockerd[3924]: time="2019-06-20T05:31:22.404848937-04:00" level=info m...ock"
Jun 20 05:31:22 localhost.localdomain systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.

[root@localhost yum.repos.d]# docker version
Client:
Version:      17.05.0-ce
API version: 1.29
Go version:   go1.7.5
Git commit:   89658be
Built:        Thu May 4 22:06:25 2017
OS/Arch:      linux/amd64

Server:
Version:      17.05.0-ce
API version: 1.29 (minimum version 1.12)
Go version:   go1.7.5
Git commit:   89658be
Built:        Thu May 4 22:06:25 2017
OS/Arch:      linux/amd64
Experimental: false
[root@localhost yum.repos.d]# cat docker.repo
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg

[root@localhost yum.repos.d]#

设置开机自启动

$ sudo systemctl enable docker

到现在docker 就安装OK啦，我要开始学习啦。