原文：https://blog.csdn.net/hello_junz/article/details/79882602

centos离线安装docker-ce 

目前越来越多的应用采用docker部署管理，使快速的部署集成变得更容易。但笔者在安装docker时，遇到一个问题，目标服务器无法联网，这就要求我们能够采用离线的方式安装docker。下面就如何离线安装docker，列出了实施步骤，与大家一起分享。

1. 系统环境

Centos7  Linux version 3.10.0-327.10.1.el7.x86_64

2. docker-ce版本

18.03.0.ce-1.el7.centos.x86_64

3. 在可以联网的机器上制作docker本地安装源

3.1 安装一个虚拟机，然后在虚拟机里面安装centos7（当然，也可以一台可以联网安装了centos7系统的主机）

3.2 创建离线包存放目录,并赋予读写权限

1. # mkdir -p /home/docker/local
2. # chmod -R 777 /home/docker/local

3.3  创建docker的yum repository

3.3 下载离线docker-ce依赖包

注意，下面指令仅仅下载离线包到指定目录。后面要用到。

1. yum install --downloadonly --downloaddir=/home/docker/local yum-utils \
2. device-mapper-persistent-data \
3. lvm2 createrepo

3.4安装docker-ce依赖包及createrepo

1. yum install yum-utils \
2. device-mapper-persistent-data \
3. lvm2 createrepo

3.5 配置docker repository

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

3.6 更新yum源索引

yum makecache fast

3.7下载离线docker-ce安装包

yum install --downloadonly --downloaddir=/home/docker/local docker-ce

3.8 获取安装docker需要的密匙

查看密匙文件url

1. [jerry@localhost ~]$ more /etc/yum.repos.d/docker-ce.repo
2. [docker-ce-stable]
3. name=Docker CE Stable - $basearch
4. baseurl=https://download.docker.com/linux/centos/7/$basearch/stable
5. enabled=1
6. gpgcheck=1
7. gpgkey=https://download.docker.com/linux/centos/gpg
8. [docker-ce-stable-debuginfo]
9. name=Docker CE Stable - Debuginfo $basearch
10. baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/stable
11. enabled=0
12. gpgcheck=1
13. gpgkey=https://download.docker.com/linux/centos/gpg

下载密匙文件(存放到/home/docker/local下)

1. cd /home/docker/local
2. wget https://download.docker.com/linux/centos/gpg

3.9 初始化安装源repodata库

1. # createrepo -pdo /home/docker/local /home/docker/local
2. # createrepo --update /home/docker/local

此时，/home/docker/local下面应该有如下安装包、文件及目录

1. container-selinux-2.42-1.gitad8f0f7.el7.noarch.rpm
2. createrepo-0.9.9-28.el7.noarch.rpm
3. device-mapper-1.02.140-8.el7.x86_64.rpm
4. device-mapper-event-1.02.140-8.el7.x86_64.rpm
5. device-mapper-event-libs-1.02.140-8.el7.x86_64.rpm
6. device-mapper-libs-1.02.140-8.el7.x86_64.rpm
7. device-mapper-persistent-data-0.7.0-0.1.rc6.el7_4.1.x8
8. docker-ce-18.03.0.ce-1.el7.centos.x86_64.rpm
9. dracut-033-502.el7_4.1.x86_64.rpm
10. dracut-config-rescue-033-502.el7_4.1.x86_64.rpm
11. dracut-network-033-502.el7_4.1.x86_64.rpm
12. libgudev1-219-42.el7_4.10.x86_64.rpm
13. libseccomp-2.3.1-3.el7.x86_64.rpm
14. libselinux-2.5-11.el7.x86_64.rpm
15. libselinux-python-2.5-11.el7.x86_64.rpm
16. libselinux-utils-2.5-11.el7.x86_64.rpm
17. libsemanage-2.5-8.el7.x86_64.rpm
18. libsemanage-python-2.5-8.el7.x86_64.rpm
19. libsepol-2.5-6.el7.x86_64.rpm
20. lvm2-2.02.171-8.el7.x86_64.rpm
21. lvm2-libs-2.02.171-8.el7.x86_64.rpm
22. pigz-2.3.3-1.el7.centos.x86_64.rpm
23. policycoreutils-2.5-17.1.el7.x86_64.rpm
24. policycoreutils-python-2.5-17.1.el7.x86_64.rpm
25. python-urlgrabber-3.10-8.el7.noarch.rpm
26. rpm-4.11.3-25.el7.x86_64.rpm
27. rpm-build-libs-4.11.3-25.el7.x86_64.rpm
28. rpm-libs-4.11.3-25.el7.x86_64.rpm
29. rpm-python-4.11.3-25.el7.x86_64.rpm
30. selinux-policy-3.13.1-166.el7_4.9.noarch.rpm
31. selinux-policy-targeted-3.13.1-166.el7_4.9.noarch.rpm
32. setools-libs-3.3.8-1.1.el7.x86_64.rpm
33. systemd-219-42.el7_4.10.x86_64.rpm
34. systemd-libs-219-42.el7_4.10.x86_64.rpm
35. systemd-python-219-42.el7_4.10.x86_64.rpm
36. systemd-sysv-219-42.el7_4.10.x86_64.rpm
37. yum-3.4.3-154.el7.centos.1.noarch.rpm
38. yum-utils-1.1.31-42.el7.noarch.rpm
39. repodata
40. gpg

3.10 打包导出安装源

# cd /home/docker/local# tar -zcvf docker-local.tar.gz *

docker-local.tar.gz这个文件，就是我们制作好的离线安装源。

4.将docker-local.tar.gz copy到无法联网的centos7 服务器上(比如/home/docker/local目录下)，并解压

1. # mkdir -p /home/docker/local （如果不存在此目录，则创建,然后copy docker-local.tar.gz到此目录）
2. # cd /home/docker/local
3. # tar -zxvf docker-local.tar.gz

5 安装createrepo

1. # cd /home/docker/local
2. # rpm -ivh createrepo-0.9.9-28.el7.noarch.rpm (这个rpm安装包就是上面我们离线下载的安装包)

6 备份安装源

1. # cd /etc/yum.repos.d/
2. # mkdir repobak
3. # mv * repobak/

7 配置离线安装源

1. # vi /etc/yum.repos.d/docker-ce-local.repo
2. [docker]
3. name=docker local
4. baseurl=file:///home/docker/local/
5. gpgcheck=0
6. enabled=1
7. gpgkey=file:///home/docker/local/gpg

8 构建本地安装源

# createrepo -d /home/docker/local/repodata# yum clean all (清除缓存)

# yum makecache (创建缓存)

9 检查本地库是否制作成功

# yum repolist

repo id                                             repo

name                                                 status

docker                                               docker

local                                               38

repolist: 38

10. 安装docker-ce

# yum install docker-ce

11.检查是否安装成功

1. # systemctl start docker
2. # docker version
3. Client:
4. Version:    18.03.0-ce
5. API version:    1.37
6. Go version:    go1.9.4
7. Git commit:    0520e24
8. Built:    Wed Mar 21 23:09:15 2018
9. OS/Arch:    linux/amd64
10. Experimental:    false
11. Orchestrator:    swarm
12. Server:
13. Engine:
14. Version:    18.03.0-ce
15. API version:    1.37 (minimum version 1.12)
16. Go version:    go1.9.4
17. Git commit:    0520e24
18. Built:    Wed Mar 21 23:13:03 2018
19. OS/Arch:    linux/amd64
20. Experimental:    false

12. 创建docker用户组

12.1 创建docker用户组

# groupadd docker

12.2 将指定用户（比如ittest）加入docker用户组

# usermod -aG docker  ittest

12.3 重启docker

# systemctl restart docker