roles(角色）

news2024/9/22 17:32:03

创建目录，编写剧本下载nginx:

184 mkdir /etc/ansible/playbook

185 vim /etc/ansible/playbook/nginx.yml

---
-       hosts:  group
        remote_user:    root
        tasks:
        -       name:   卸载httpd
                yum:    name=httpd      state=absent
        -       name:   安装nginx
                yum:    name=nginx      state=present
        -       name:   修改配置文件
                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.conf
                notify:
                -       restart nginx
        -       name:   启动服务
                service:        name=nginx   state=started  enabled=yes
        handlers:
                -       name:   restart nginx
                        service:        name=nginx      state=restarted

186 ansible-playbook /etc/ansible/playbook/nginx.yml

roles

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

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

[root@nat ~]# ls /etc/ansible/roles/
mariadb nginx
[root@nat ~]# ls /etc/ansible/roles/nginx
files handlers meta tasks templates vars
[root@nat ~]# ls /etc/ansible/roles/mariadb/
files handlers meta tasks templates vars

用roles（角色）来下载nginx

创建roles的目录结构：

[root@nat ~]# cd /etc/ansible/roles
[root@nat roles]# ls
[root@nat roles]# mkdir nginx
[root@nat roles]# ls
nginx
[root@nat roles]# cd nginx/
[root@nat nginx]# mkdir files
[root@nat nginx]# mkdir tasks
[root@nat nginx]# mkdir handlers
[root@nat nginx]# mkdir templates
[root@nat nginx]# mkdir vars
[root@nat nginx]# mkdir meta

创建文件：

[root@nat nginx]# touch handlers/main.yml
[root@nat nginx]# touch tasks/main.yml
[root@nat nginx]# touch vars/main.yml
[root@nat nginx]# touch meta/main.yml

[root@nat nginx]# tree
.
├── files
├── handlers
│   └── main.yml
├── meta
│   └── main.yml
├── tasks
│   └── main.yml
├── templates
└── vars
└── main.yml

6 directories, 4 files

编辑文件：

[root@nat ~]# vim /etc/ansible/playbook/test002.yml

---
-       hosts:  group
        remote_user:    root
        roles:
                -       nginx
...

[root@nat ~]# ansible-playbook /etc/ansible/playbook/test002.yml

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

[root@nat ~]# 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@nat ~]# ansible-playbook /etc/ansible/playbook/test002.yml

使用roles实现lnmp

nginx改配置8080

mariadb中创建eleme数据库，创建表user

[root@nat ~]# cd /etc/ansible/
[root@nat ansible]# mkdir script
[root@nat ansible]# cd script/
[root@nat script]# vim dbtable.sh

[root@nat script]# vim /etc/ansible/playbook/test003.yml

[root@nat script]# cd /etc/ansible/roles
[root@nat roles]# ls
nginx
[root@nat roles]# cp -r nginx mariadb
[root@nat roles]# ls
mariadb nginx
[root@nat roles]# cd mariadb
[root@nat mariadb]# ls
files handlers meta tasks templates vars
[root@nat mariadb]# vim /etc/ansible/roles/mariadb/tasks/main.yml