19，Ansible角色

2，ansible角色目录模板(以配置rsync服务为例）
mkdir -p /etc/ansible/roles/rsync (创建角色目录，做到统一管理）
mkdir {files,handlers,tasks,templates,vars} （规定死的目录）
1）cd rsync
vi tasks/main.yml

- name: 01-add-group                    
    group:                  
      name: www                 
      gid: 666                  
    tags: 01-add-group                  
  - name: 02-add-user                   
    user:                   
      name: www                 
      create_home: no                   
      shell: /sbin/nologin                  
      uid: 666                  
      group: www                    
    tags: 02-add-user                   
  - name: 03-install rsync                  
    yum:                    
      name: rsync                   
      state: installed                  
    tags: 03-install rsync                  
  - name: 04-copy rsyncd.conf                   
    copy:                   
      src: rsyncd.conf                  
      dest: /etc/                   
    notify:                 
      - restarted rsyncd                    
    tags: 04-copy rsyncd.conf                   
  - name: 05-create rsync.passwd                    
    copy:                   
      src: rsync.passwd                 
      dest: /etc/                   
      mode: 600                 
    tags: 05-create rsync.passwd                    
  - name: 06-create backup and data directory                   
    file:                   
      path: "{{ item }}"                    
      state: directory                  
      owner: www                    
      group: www                    
    loop:                   
      - "{{ path_backup }}"                 
      - "{{ path_data }}"                   
    tags: 06-create backup and data directory                   
  - name: 08-start rsyncd                   
    service:                    
      name: rsyncd                  
      state: started                    
    tags: 08-start rsyncd                   
  - name: 09-enbaled rsyncd                 
    systemd:                    
      name: rsyncd                  
      enabled: yes                  
    tags: 09-enbaled rsyncd

2)cd files （配置文件统一归到files目录）

3）vi vars/main.yml (放定义的变量）

path_backup: /backup        
path_data: /data    

4）vi handlers/main.yml (notify的触发重启机制）

- name: restart rsyncd                      
  service:                      
    name: rsyncd                        
    state: restarted                        

5）创建一个开关文件

6）执行
ansible-playbook -C rsync_install.yml
ansible-playbook rsync_install.yml
7，ansible角色templates功能调用
templates模块的功能和files模块的功能类似。使用场景是不一样的：files模块里的配置文件直接批量复制到其他主机就行
它里面的配置参数你写好了就不用变，像rsync和nfs配置文件，但像SSH优化配置文件，里面的设置的登录ip是要跟相应主机ip变化而变化。这个时候templates模块就简单很多

1）这里我们创建一个init角色，这是一个初始化角色，就是将我们主机需要的所有基础配置统一用这个角色去做好
mkdir -p /etc/ansible/roles/init
mkdir {files,handlers,tasks,templates,vars}

2)vi tasks/main.yml
#01.配置base源

- name: 01_configure_yum_repos                      
  yum_repository:                       
    name: base                      
    description: base yum repo                      
    baseurl:                        
      - http://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/                        
    gpgcheck: no                        

#02.配置epel源

- name: 02_configure_yum_Repos                      
  yum_repository:                       
    name: epel                      
    description: epel yum repo                      
    baseurl:                        
      - https://mirrors.tuna.tsinghua.edu.cn/epel/7/$basearch                       
    gpgcheck: no                        

#03.安装常用软件

- name: 03_install_server                       
  yum:                      
    name: "{{ packages }}"                      
  vars:                     
    packages:                       
    - ntpdate                       
    - lsof                      
    - tree                      
    - iftop                     
    - iotop                 

#04.创建用户组

- name: 04_create_group                     
  group:                        
    name: www                       
    gid: 666                

#05.创建用户

- name: 05_create_user                      
  user:                     
    name: www                       
    uid: 666                        
    group: www                      
    shell: /sbin/nologin                        
    create_home: no             

#06.创建数据目录和脚本目录

- name: 06_create_dir                       
  file:                     
    path: "{{ item }}"                      
    state: directory                        
    mode: ‘0755‘                        
  loop:                     
    - /data                     
    - /server/scripts   

#07.创建同步时间定时任务

- name: 07_cron_ntpdate                     
  cron:                         
    name: Time_Update                       
    minute: "*/5"                       
    job: ‘/sbin/ntpdate time1.aliyun.com‘           

#08.拷贝优化后的ssh配置文件

- name: 08_copy_ssh                     
  template:                         
    src: sshd_config.j2                     
    dest: /etc/ssh/sshd_config                      
    mode: ‘0600‘                        
    backup: yes                     
  notify: restart sshd  

3)cp /etc/ssh/sshd_config templates/sshd_config.j2(这里配置文件就不用写在files模块下了)优化参数

#Port 22
#AddressFamily any
ListenAddress {{ ansible_facts.eth0.ipv4.address }}
#ListenAddress ::

19，Ansible角色