环境准备

[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=""

[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

操作系统需求

更换默认的yum源

[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

[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

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

参考文档：