CentOS 7 安装 docker-ce
1、CentOS 7 的默认 docker 版本
[root@Tang ~]# yum info docker
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
Available Packages
Name : docker
Arch : x86_64
Epoch : 2
Version : 1.13.1
Release : 103.git7f2769b.el7.centos
Size : 18 M
Repo : extras/7/x86_64
Summary : Automates deployment of containerized applications
URL : https://github.com/docker/docker
License : ASL 2.0
Description : Docker is an open-source engine that automates the deployment of any
: application as a lightweight, portable, self-sufficient container that will
: run virtually anywhere.
:
: Docker containers can encapsulate any payload, and will run consistently on
: and between virtually any server. The same container that a developer builds
: and tests on a laptop will run at scale, in production*, on VMs, bare-metal
: servers, OpenStack clusters, public instances, or combinations of the above.
2、下载 docker-ce.repo
2.1 获取 docker-ce.repo 链接
2.2 在 CentOS 7 相关目录里进行此 repo 下载
[root@Tang ~]# cd /etc/yum.repos.d/
[root@Tang yum.repos.d]# pwd
/etc/yum.repos.d
[root@Tang yum.repos.d]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
--2019-11-18 18:56:09-- https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 27.221.92.7, 61.240.128.242, 119.167.132.16, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|27.221.92.7|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2640 (2.6K) [application/octet-stream]
Saving to: ‘docker-ce.repo’
100%[===========================================================================================>] 2,640 --.-K/s in 0s
2019-11-18 18:56:09 (39.5 MB/s) - ‘docker-ce.repo’ saved [2640/2640]
2.3 查看此 CentOS 的 repolist ，确认 repo 是否下载成功
[root@Tang yum.repos.d]# ll
total 48
-rw-r--r--. 1 root root 1664 Nov 23 2018 CentOS-Base.repo
-rw-r--r--. 1 root root 1309 Nov 23 2018 CentOS-CR.repo
-rw-r--r--. 1 root root 649 Nov 23 2018 CentOS-Debuginfo.repo
-rw-r--r--. 1 root root 314 Nov 23 2018 CentOS-fasttrack.repo
-rw-r--r--. 1 root root 630 Nov 23 2018 CentOS-Media.repo
-rw-r--r--. 1 root root 1331 Nov 23 2018 CentOS-Sources.repo
-rw-r--r--. 1 root root 5701 Nov 23 2018 CentOS-Vault.repo
-rw-r--r--. 1 root root 2640 Nov 17 15:51 docker-ce.repo
-rw-r--r--. 1 root root 91 Oct 16 17:01 epel.repo
-rw-r--r--. 1 root root 1050 Oct 3 2017 epel-testing.repo
-rw-r--r--. 1 root root 410 Aug 28 2017 zabbix.repo
2.4 此时查看 docker-ce 版本（建议安装此版本，此版本较新）
[root@Tang ~]# yum makecache
[root@Tang yum.repos.d]# yum info docker-ce
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.tuna.tsinghua.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
Available Packages
Name : docker-ce
Arch : x86_64
Epoch : 3
Version : 19.03.5
Release : 3.el7
Size : 24 M
Repo : docker-ce-stable/x86_64
Summary : The open-source application container engine
URL : https://www.docker.com
License : ASL 2.0
Description : Docker is a product for you to build, ship and run any application as a
: lightweight container.
:
: Docker containers are both hardware-agnostic and platform-agnostic. This means
: they can run anywhere, from your laptop to the largest cloud compute instance and
: everything in between - and they don't require you to use a particular
: language, framework or packaging system. That makes them great building blocks
: for deploying and scaling web apps, databases, and backend services without
: depending on a particular stack or provider.
2.4 docker-ce 生成的文件
[root@Tang ~]# rpm -ql docker-ce
/usr/bin/docker-init
/usr/bin/docker-proxy
/usr/bin/dockerd
/usr/lib/systemd/system/docker.service
/usr/lib/systemd/system/docker.socket
/var/lib/docker-engine/distribution_based_engine.json
3、安装并启动 docker-ce
3.1 安装
[root@Tang ~]# yum install docker-ce -y
Installed:
docker-ce.x86_64 3:19.03.5-3.el7
Dependency Installed:
container-selinux.noarch 2:2.107-3.el7 containerd.io.x86_64 0:1.2.10-3.2.el7 docker-ce-cli.x86_64 1:19.03.5-3.el7
Complete!
[root@Tang ~]# rpm -q docker-ce
docker-ce-19.03.5-3.el7.x86_64
[root@Tang ~]# rpm -ql docker-ce
/usr/bin/docker-init
/usr/bin/docker-proxy
/usr/bin/dockerd
/usr/lib/systemd/system/docker.service
/usr/lib/systemd/system/docker.socket
/var/lib/docker-engine/distribution_based_engine.json
3.2 启动
### 启动时使用的还是 docker 的 unit file ###
[root@Tang ~]# systemctl start docker
[root@Tang ~]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
Active: active (running) since Tue 2019-11-19 09:38:34 CST; 3s ago
Docs: https://docs.docker.com
Main PID: 6437 (dockerd)
Tasks: 12
Memory: 44.5M
CGroup: /system.slice/docker.service
└─6437 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
3.3 运行程序环境
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
4、配置 Docker 镜像加速
可以配置基于以下三个方式的 Docker 镜像加速，可以使用 ， 分隔来进行多个镜像加速站点的配置：
- docker cn
- 阿里云加速器
- 中国科技大学
4.1 docker cn 镜像加速配置
### docker cn 加速 ###
[root@Tang ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://registry.docker-cn.com"]
}
4.2 阿里云镜像加速配置
4.2.1 获取阿里云镜像地址
4.2.2 配置 /etc/docker/daemon.json 文件
[root@Tang ~]# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://pz88w5t4bz.mirror.aliyuncs.com"]
}
