Docker的部署安装(CentOS)-by paymob

环境准备

通过命令查看系统版本和内核版本等信息

[gmuser@--- ~]$ cat /etc/redhat-release
CentOS Linux release 7.2. (Core)
[gmuser@--- ~]$ uname -a
Linux --- 3.10.-327.18..el7.x86_64 # SMP Thu May  :: UTC  x86_64 x86_64 x86_64 GNU/Linux
[gmuser@--- ~]$ cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID=""
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION=""
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION=""

为用户提权（sudo）

[gmuser@--- ~]$ sudo install
[sudo] password for gmuser:
Sorry, try again.

[sudo] password for gmuser:
gmuser is not in the sudoers file.  This incident will be reported.
[gmuser@--- ~]$ su root

Password:
[root@--- gmuser]# vim /etc/sudoers

## Allow root to run any commands anywhere

root    ALL=(ALL)       ALL

gmuser  ALL=(ALL)       ALL

## Allows members of the 'sys' group to run networking, software,

## service management apps and more.

# %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS

## Allows people in group wheel to run all commands

保存退出

操作系统需求

为兼容企业级应用，学习选用Centos7做为部署安装Docker的系统平台

更换默认的yum源

Centos默认的yun源在国外，速度很慢有时间也无法访问

[gmuser@--- ~]$ yum repolist

[gmuser@--- ~]$ vi /etc/hosts  

[gmuser@--- ~]$ ping mirrors.aliyun.com

更换成aliyun yum 源

[root@--- /]# cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

[root@--- /]# curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

[root@--- /]# vi /etc/yum.repos.d/CentOS-Base.repo

Yum运行下面的命令生成缓存

[root@--- /]# yum clean all
Loaded plugins: fastestmirror, langpacks
Cleaning repos: base epel extras updates
Cleaning up everything
Cleaning up list of fastest mirrors
[root@--- /]# yum makecache
[root@--- /]# yum repolist

删除docker旧版本

[gmuser@--- /]$ sudo yum remove docker docker-common docker-selinux docker-engine
[sudo] password for gmuser:
Loaded plugins: fastestmirror, langpacks
No Match for argument: docker
No Match for argument: docker-common
No Match for argument: docker-selinux
No Match for argument: docker-engine
No Packages marked for removal

安装 Docker CE

[gmuser@--- /]$ sudo yum remove docker docker-common docker-selinux docker-engine
[gmuser@--- /]$ sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[gmuser@--- /]$ sudo yum install -y docker-ce

若需要安装指定的版本时，可参照以下命令

启动docker

[gmuser@--- /]$ sudo systemctl start docker
[gmuser@--- /]$ sudo docker ps
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

[gmuser@--- /]$

升级和卸载docker

使用阿里镜像加速器

使用阿里云专属加速器加快获取Docker官方镜像，否则在国内速度会慢到你无法忍受哒。步骤如下：

1. 免费注册一个阿里云账号 www.aliyun.com
2. 进入加速器页面 https://cr.console.aliyun.com/#/accelerator
3. 选择镜像加速器

按图中进行相关配置

参考文档：

• 官方文档：Get Docker CE for CentOS