---

• 获取权限

1、root权限用户登录
2、sudo命令获取权限

---

• 内核版本检测

Docker要求CentOS系统的内核版本高于3.10

uname -r 

检测版本大于3.10即可正常使用

[root@VM_0_12_centos ~]# uname -r
3.10.0-957.21.3.el7.x86_64

---

• 更新yum

yum update

yum安装需依赖yum-utils 、device-mapper-persistent-data、lvm2

yum install -y yum-utils device-mapper-persistent-data lvm2

若更新过程中，python依赖包更新失败

依赖关系解决

================================================================================
 Package                架构           版本                    源          大小
================================================================================
正在更新:
 python-urllib3         noarch         1.10.2-7.el7            os         103 k

事务概要
================================================================================
升级  1 软件包
/// 更新失败⤵️
Running transaction
  正在更新    : python-urllib3-1.10.2-7.el7.noarch                          1/2 
Error unpacking rpm package python-urllib3-1.10.2-7.el7.noarch
error: unpacking of archive failed on file /usr/lib/python2.7/site-packages/urllib3/packages/ssl_match_hostname: cpio: rename
  验证中      : python-urllib3-1.10.2-7.el7.noarch                          1/2 
python-urllib3-1.10.2-5.el7.noarch was supposed to be removed but is not!
  验证中      : python-urllib3-1.10.2-5.el7.noarch                          2/2 

失败:
  python-urllib3.noarch 0:1.10.2-5.el7   python-urllib3.noarch 0:1.10.2-7.el7  

完毕！

可这样操作

pip install --upgrade urllib3

---

• 配置Docker CE仓库

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

可见docker-ce.repo已添加

[root@VM_0_12_centos yum.repos.d]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
已加载插件：fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@VM_0_12_centos yum.repos.d]# ls
CentOS-Base.repo       CentOS-Epel.repo       CentOS-Sources.repo
CentOS-CR.repo         CentOS-fasttrack.repo  CentOS-Vault.repo
CentOS-Debuginfo.repo  CentOS-Media.repo      docker-ce.repo

---

刷新缓存

yum makecache fast

⬇️

[root@VM_0_12_centos yum.repos.d]# yum makecache fast
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
docker-ce-stable                                         | 3.5 kB     00:00     
epel                                                     | 5.3 kB     00:00     
extras                                                   | 2.9 kB     00:00     
os                                                       | 3.6 kB     00:00     
updates                                                  | 2.9 kB     00:00     
元数据缓存已建立

---

• 安装Docker

查看docker版本

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

可选择版本安装

yum install docker-ce-3:19.03.5-3.el7.ce

或不选择

yum -y install docker-ce

完成后查看版本

docker version

可见c-v版本

[root@VM_0_12_centos ~]# docker version
Client: Docker Engine - Community
 Version:           19.03.5
 API version:       1.40
 Go version:        go1.12.12
 Git commit:        633a0ea
 Built:             Wed Nov 13 07:25:41 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.5
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.12
  Git commit:       633a0ea
  Built:            Wed Nov 13 07:24:18 2019
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.2.10
  GitCommit:        b34a5c8af56e510852c35414db4c1f4fa6172339
 runc:
  Version:          1.0.0-rc8+dev
  GitCommit:        3e425f80a8c931f88e6d94a8c831b9d5aa481657
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

---

• 启动Docker

启动

systemctl start docker

设置开机启动

systemctl enable docker

查看启动状态

systemctl status docker

若为active (running)，则启动成功

[root@VM_0_12_centos ~]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: active (running) since 一 2019-11-25 11:03:53 CST; 1h 26min ago
     Docs: https://docs.docker.com
 Main PID: 14312 (dockerd)
   CGroup: /system.slice/docker.service
           └─14312 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/con...

11月 25 11:03:52 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:52.8...c
11月 25 11:03:52 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:52.8...c
11月 25 11:03:52 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:52.8..."
11月 25 11:03:52 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:52.9..."
11月 25 11:03:53 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:53.3..."
11月 25 11:03:53 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:53.5..."
11月 25 11:03:53 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:53.6...5
11月 25 11:03:53 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:53.6..."
11月 25 11:03:53 VM_0_12_centos dockerd[14312]: time="2019-11-25T11:03:53.6..."
11月 25 11:03:53 VM_0_12_centos systemd[1]: Started Docker Application Cont....
Hint: Some lines were ellipsized, use -l to show in full.

---

附

• 终端直接连接Linux

ssh [用户名]@[ip地址]