本文档主要介绍如何使用ansible在centos中快速安装时新版docker，目标服务器为一台阿里云ECS，安装操作系统为阿里云提供的公共镜像Centos7.9-64。
安装实践分为本地安装、远程安装两种，每次安装docker之前都会对ECS重装操作系统，且不预装任何服务和软件。
准备
硬件
- 一台阿里云ECS：1c2g40g
- 一台可以连接阿里云的linux服务器，预装ansible和git
基础环境
| 服务器类型 | OS | 公网IP | 内网IP | 备注 |
|---|---|---|---|---|
| 目标服务器 | Centos7.9（阿里云自带的公共镜像） | 123.23.12.21 | 172.22.3.13 | 阿里云ECS(root/Epay@1002) |
| 主控端 | Centos7.9 | 192.168.99.240 | 本地LInux服务器 |
安装
本地安装
本地安装指直接ssh到目标服务器，进行安装。
安装基础组件
安装ansible
[root@myhost ~]# yum install -y ansible
[root@myhost ~]# ansible --version
ansible 2.9.27
config file = /etc/ansible/ansible.cfg
configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
ansible python module location = /usr/lib/python2.7/site-packages/ansible
executable location = /usr/bin/ansible
python version = 2.7.5 (default, Nov 16 2020, 22:23:17) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)]
[root@myhost ~]#
安装git
[root@myhost ~]# yum install -y git
[root@myhost ~]# git version
git version 1.8.3.1
下载脚本
[root@myhost ~]# git clone https://gitee.com/pi4k8s/ansible-exmaples.git
安装docker
[root@myhost ~]# cd ansible-examples/aliyun-cento79/
[root@myhost aliyun-cento79]# sh install-docker.sh localhost
[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost
does not match 'all'
PLAY [localhost] *****************************************************************************************
TASK [Gathering Facts] ***********************************************************************************
ok: [localhost]
TASK [docker : install required packages] ****************************************************************
changed: [localhost]
TASK [Add docker repositories] ***************************************************************************
changed: [localhost]
TASK [install docker] ************************************************************************************
changed: [localhost]
TASK [docker : swap off is fstab] ************************************************************************
ok: [localhost]
TASK [docker : swap is off] ******************************************************************************
changed: [localhost]
TASK [mkdir /etc/docker] *********************************************************************************
changed: [localhost]
TASK [docker etc is file] ********************************************************************************
changed: [localhost]
TASK [restart docker] ************************************************************************************
changed: [localhost]
RUNNING HANDLER [docker : yum-makecache] *****************************************************************
[WARNING]: Consider using the yum module rather than running 'yum'. If you need to use command because
yum is insufficient you can add 'warn: false' to this command task or set 'command_warnings=False' in
ansible.cfg to get rid of this message.
changed: [localhost]
RUNNING HANDLER [restart docker] *************************************************************************
changed: [localhost]
PLAY RECAP ***********************************************************************************************
localhost : ok=11 changed=9 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
验证
[root@myhost aliyun-cento79]# docker version
Client: Docker Engine - Community
Version: 20.10.15
API version: 1.41
Go version: go1.17.9
Git commit: fd82621
Built: Thu May 5 13:16:58 2022
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.15
API version: 1.41 (minimum version 1.12)
Go version: go1.17.9
Git commit: 4433bf6
Built: Thu May 5 13:15:18 2022
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.4
GitCommit: 212e8b6fa2f44b9c21b2798135fc6fb7c53efc16
runc:
Version: 1.1.1
GitCommit: v1.1.1-0-g52de29d
docker-init:
Version: 0.19.0
GitCommit: de40ad0
远程安装
本地安装指ssh到主控端，然后通过ansible将docker安装到目标服务器
下载脚本
[root@myhost ~]# git clone https://gitee.com/pi4k8s/ansible-exmaples.git
安装docker
[root@server240 ansible-examples]# cd ..
[root@server240 output]# cd ansible-examples/aliyun-cento79/
[root@server240 aliyun-cento79]# ANSIBLE_HOST_KEY_CHECKING=false sh install-docker.sh myhost
PLAY [myhost] ********************************************************************************************
TASK [Gathering Facts] ***********************************************************************************
ok: [myhost]
TASK [docker : install required packages] ****************************************************************
changed: [myhost]
TASK [docker : Add docker repositories] ******************************************************************
changed: [myhost]
TASK [docker : install docker] ***************************************************************************
changed: [myhost]
TASK [docker : swap off is fstab] ************************************************************************
ok: [myhost]
TASK [docker : swap is off] ******************************************************************************
changed: [myhost]
TASK [docker : mkdir /etc/docker] ************************************************************************
changed: [myhost]
TASK [docker : docker etc is file] ***********************************************************************
changed: [myhost]
TASK [docker : restart docker] ***************************************************************************
changed: [myhost]
RUNNING HANDLER [docker : yum-makecache] *****************************************************************
[WARNING]: Consider using yum module rather than running yum
changed: [myhost]
RUNNING HANDLER [docker : restart docker] ****************************************************************
changed: [myhost]
PLAY RECAP ***********************************************************************************************
myhost : ok=11 changed=9 unreachable=0 failed=0
验证
[root@server240 aliyun-cento79]# ansible -m shell -a 'docker version' -i hosts myhost
myhost | SUCCESS | rc=0 >>
Client: Docker Engine - Community
Version: 20.10.15
API version: 1.41
Go version: go1.17.9
Git commit: fd82621
Built: Thu May 5 13:16:58 2022
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.15
API version: 1.41 (minimum version 1.12)
Go version: go1.17.9
Git commit: 4433bf6
Built: Thu May 5 13:15:18 2022
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.4
GitCommit: 212e8b6fa2f44b9c21b2798135fc6fb7c53efc16
runc:
Version: 1.1.1
GitCommit: v1.1.1-0-g52de29d
docker-init:
Version: 0.19.0
GitCommit: de40ad0
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