ansible

项目介绍：

实现目的：使用 Ansibe playbook 检查 web 服务器状态，模拟 httpd 没有启动，启动 httpd，使得 web 服务器恢复正常。

文件说明：

1、pre.yml：安装 httpd 服务，配置 httpd 服务

2、fix_web.yml：检测出 httpd 服务出现问题，并启动 httpd 服务，使得 web 服务器恢复正常。

环境说明：

系统：el7

主机名：web

IP:192.168.149.6

Ansible控制节点和被管节点均为web服务器

[root@web ~]# uname -a

Linux web 3.10.0-1160.36.2.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux

[root@web ~]# hostname

web

[root@web ~]# ip a|grep inet

inet 192.168.149.6/24 brd 192.168.149.255 scope global ens33

[root@servera ~]# ansible web -m ping -o

192.168.149.6 | SUCCESS => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "ping": "pong"}

实验过程：

[root@web ~]# ansible-playbook pre.yml

[root@web ~]# curl web

web server is running by @iamjacker

[root@web ~]# #模拟 httpd 没有启动

[root@web ~]# systemctl stop httpd

[root@web ~]# ansible-playbook fix_web.yml

PLAY [web] **********************************************************************************************************************

TASK [Check that a page returns a status 200 and fix if the word jack is not in the page contents] ****************************** fatal: [192.168.149.6]: FAILED! => {"ansible_facts": {"discovered_interpreter_python": "/usr/bin/python"}, "changed": false, "content": "", "elapsed": 0, "msg": "Status code was -1 and not [200]: Request failed: <urlopen error [Errno 111] Connection refused>", "redirected": false, "status": -1, "url": "http://192.168.149.6"} ...ignoring

TASK [debug] ******************************************************************************************************************** ok: [192.168.149.6] => { "res": { "ansible_facts": { "discovered_interpreter_python": "/usr/bin/python" }, "changed": false, "content": "", "elapsed": 0, "failed": true, "msg": "Status code was -1 and not [200]: Request failed: <urlopen error [Errno 111] Connection refused>", "redirected": false, "status": -1, "url": "http://192.168.149.6" } }

TASK [debug] ******************************************************************************************************************** ok: [192.168.149.6] => { "msg": "Status code was -1 and not [200]" }

TASK [start web service if web service is not started] ************************************************************************** changed: [192.168.149.6]

PLAY RECAP ********************************************************************************************************************** 192.168.149.6 : ok=4 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=1

实验验证：web 服务器恢复正常

[root@web ~]# curl web

web server is running by @iamjacker