playbook编写（四）

文件处理

文件处理的模块（常用）

Blockinfile 该模块可以管理员在指定的文件中插入“一段文本”

Copy 该模块主要用于拷贝文件，将控制节点上的文件拷贝到被管理主机

Fatch 该模块从远程主机中拉取文件到被管理的节点

Lineinfile 支持正则表达式

File 修改文件权限

State 查看文件状态

Synchronize ------>等价于 rsync 批量同步文件

Sefcontext 修改文件上下文永久生效，修改系统的 selinux 相关的配置文件

使用 JINJA2 模版部署自定义文件

 · 修改文件时调用 JINJA2模版

JINJA2介绍

 使用 JINJA2 模版

 

[student@workstation file-template]$ cat motd.j2
      This is the system {{ ansible_facts['fqdn'] }}. 
      This is a {{ ansible_facts['distribution'] }} version {{ ansible_facts['distribution_version'] }} system. 
      Only use this system with permission. 
      Please report issues to: {{ system_owner }}.


[student@workstation file-template]$ cat motd.yml  
      --- 
      - name: configure SOE   
        hosts: all   
        remote_user: devops   
        become: true   
        vars:     
          - system_owner: clyde@example.com   
        tasks:     
          - name: configure /etc/motd       
            template:         
              src: motd.j2         
              dest: /etc/motd         
              owner: root         
              group: root         
              mode: 0644 

练习：

Generate a hosts file

Download an initial template file from

http://content.example.com/materials/hosts.j2 to /home/devops/ansible

Complete the template so that it can be used to generate a file with a line for

each inventory host in the same format as /etc/hosts

Create a playbook called /home/devops/ansible/hosts.yml that uses this template

to generate the file /etc/myhosts on hosts in the dev host group.

When the playbook is run, the file /etc/myhosts on hosts in the dev host group should

have a line for each managed host:

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

172.25.250.10 servera.lab.example.com servera

172.25.250.11 serverb.lab.example.com serverb

172.25.250.12 serverc.lab.example.com serverc

172.25.250.13 serverd.lab.example.com serverd

172.25.250.14 servere.lab.example.com servere

172.25.250.15 serverf.lab.example.com serverf

NOTE: The order in which the inventory host names appear is not important. 

 

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