day32(8/20)——playbook剧本安装nginx、roles

nginx-toc" style="margin-left:120px;">一、playbook 剧本安装nginx

二、roles(难点)

1、roles介绍

2、创建roles的目录结构

3、案例

4、练习:

一、playbook 剧本安装nginx

[root@m0 ~]# mkdir /etc/ansible/playbook
[root@m0 ~]# vim /etc/ansible/playbook/nginx.yml
---
-       hosts:          group02remote_user:    roottasks:-       name:   卸载httpdyum:    name=httpd      state=absent-       name:   安装epelyum:    name=epel-release       state=present-       name:   安装nginxyum:    name=nginx      state=present-       name:   修改资源文件shell:  echo 'i am nginx,port is 80' > /usr/share/nginx/html/index.html-       name:   修改端口command:        sed -i '/listen/s/80/8080/g' /etc/nginx/nginx.confnotify:-       restart nginx-       name:   启动服务service:        name=nginx   state=started  enabled=yeshandlers:-       name:   restart nginxservice:        name=nginx    state=restarted
[root@m0 ~]# ansible-playbook /etc/ansible/playbook/nginx.yml

二、roles(难点)

1、roles介绍

roles(⻆⾊): 就是通过分别将variables, tasks及handlers等放置于单独的⽬录中,并可以便捷地调⽤它们的⼀种机制。
假设我们要写⼀个playbook来安装管理lamp环境，那么这个playbook就会写很⻓。所以我们希望把这个很⼤的⽂件分成多个功能拆分, 分成apache管理,php管理,mysql管理，然后在需要使⽤的时候直接调⽤就可以了，以免重复写。就类似编程⾥的模块化的概念，以达到代码复⽤的效果。

2、创建roles的目录结构

files：⽤来存放由copy模块或script模块调⽤的⽂件。
tasks：⾄少有⼀个main.yml⽂件，定义各tasks。
handlers:有⼀个main.yml⽂件，定义各handlers。
templates：⽤来存放jinjia2模板。
vars：有⼀个main.yml⽂件，定义变量。
meta：有⼀个main.yml⽂件，定义此⻆⾊的特殊设定及其依赖关系。

注意: 在每个⻆⾊的⽬录中分别创建files,tasks,handlers,templates,vars和meta⽬录，⽤不到的⽬录可以创建为空⽬录.

3、案例

[root@m0 ~]# cd /etc/ansible/roles/
[root@m0 roles]# ls
[root@m0 roles]# mkdir nginx
[root@m0 roles]# ls
nginx
[root@m0 roles]# cd nginx/
[root@m0 nginx]# mkdir files
[root@m0 nginx]# mkdir tasks
[root@m0 nginx]# mkdir handlers
[root@m0 nginx]# mkdir templates
[root@m0 nginx]# mkdir vars
[root@m0 nginx]# mkdir meta
[root@m0 nginx]# tree
.
├── files
├── handlers
├── meta
├── tasks
├── templates
└── vars
[root@m0 nginx]# touch handlers/main.yml
[root@m0 nginx]# touch tasks/main.yml
[root@m0 nginx]# touch vars/main.yml
[root@m0 nginx]# touch meta/main.yml
[root@m0 nginx]# tree
.
├── files
├── handlers
│ └── main.yml
├── meta
│ └── main.yml
├── tasks
│ └── main.yml
├── templates
└── vars
└── main.yml
[root@m0 ~]# vim /etc/ansible/playbook/test002.yml
---
- hosts: s
remote_user: root
roles:
- nginx
[root@m0 ~]# ansible-playbook /etc/ansible/playbook/test002.yml
[root@m0 ~]# ansible s -m yum -a 'name=nginx state=absent'
[root@m0 ~]# vim /etc/ansible/roles/nginx/tasks/main.yml
---
- name: 卸载httpd
yum: name=httpd state=absent
- name: 卸载nginx
yum: name=nginx state=absent
- name: 安装nginx
yum: name=nginx state=present
- name: 启动服务
service: name=nginx state=started enabled=yes
...
[root@m0 ~]# ansible-playbook /etc/ansible/playbook/test002.yml
[root@m0 ~]# vim /etc/ansible/playbook/test002.yml
---
- hosts: s
remote_user: root
roles:
- nginx
- mysql
[root@m0 ~]# cp /etc/ansible/roles/nginx/ /etc/ansible/roles/mysql -r
[root@m0 ~]# ansible-playbook /etc/ansible/playbook/test002.yml

4、练习:

1.创建roles⽬录及⽂件,并确认⽬录结构

[root@m0 ~]# cd /etc/ansible/roles/
[root@m0 roles]# tree
.
└── httpd
├── files
├── handlers
│ └── main.yml
├── meta
│ └── main.yml
├── tasks
│ └── main.yml
├── templates
└── vars
└── main.yml

2.准备httpd服务器的主⻚⽂件,php测试⻚和配置⽂件等
[root@m0 ~]# yum -y install httpd
[root@m0 roles]# echo "<?php\n\tphpinfo();\n?>" > /etc/ansible/roles/httpd/files/test.php
[root@m0 roles]# echo "test main page" > /etc/ansible/roles/httpd/files/index.html
[root@m0 roles]# cp /etc/httpd/conf/httpd.conf /etc/ansible/roles/httpd/files/

3.编写httpd⻆⾊的main.yml⽂件
[root@m0 roles]# vim /etc/ansible/roles/httpd/tasks/main.yml
---
- name: 安装httpd
yum: name=httpd,httpd-devel state=present

- name: 同步httpd配置文件
copy: src=/etc/ansible/roles/httpd/files/httpd.conf dest=/etc/httpd/conf/httpd.conf

notify: restart httpd

- name: 同步主页文件
copy: src=/etc/ansible/roles/httpd/files/index.html dest=/var/www/html/index.html

- name: 同步php测试页
copy: src=/etc/ansible/roles/httpd/files/test.php dest=/var/www/html/test.php

- name: 启动httpd并开机自启动
service: name=httpd state=started enabled=yes

4.编写httpd⻆⾊⾥的handler
[root@m0 ansible]# vim /etc/ansible/roles/httpd/handlers/main.yml
---
- name: restart httpd
service: name=httpd state=restarted

5.将两台主机添加到组
[root@m0 ~]# vim /etc/ansible/hosts
s1 ansible_ssh_host=192.168.1.68 ansible_ssh_port=22 ansible_ssh_user=root ansible_ssh_pass=q
s2 ansible_ssh_host=192.168.1.69 ansible_ssh_port=22 ansible_ssh_user=root ansible_ssh_pass=q