Ansible playbook

playbook介绍

ansible playbook是一系列ansible命令的集合，利用yaml（Yet Another Markup Language）语言编写。playbook命令根据自上而下的顺序依次执行。

playbook基本语法

vim users.yml
---
- name: create user
  hosts: webservers, prod
  tasks:
    - name: create admin1
      user:
        name:  admin1
        state: present
    - name: create it group
      group:
        name: it
        state: present

ansible-playbook --syntax-check users.yml
ansible-playbook -C users.yml
ansible-playbook users.yml

# ---：顶格写，作为语法开头。
# - name：顶格写，描述信息，可为空。
# hosts：主机组
# tasks：定义要做的任务，一个任务由一个-开始，如果name前不加-，则user前面必须加-
# user：使用user模块
# state：定义是存在(present)还是不存在(absent)
# -C：测试playbook，不会真的执行。有的时候后面的操作需要依赖前面的操作，所以不一定测试失败，真的执行的时候也会失败

playbook装包

---
- name: Install package and upgrade software
  hosts: prod
  tasks:
    - name: install httpd and php
      yum:
        name: 
          - httpd
          - php
        state: present
    - name: copy index.html to /var/www/html
      copy:
        src: /home/admin/index.html
        dest: /var/www/html/index.html
        owner: root
        group: root
        mode: 0644 
    - name: modify httpd.conf
      lineinfile:
        path: /etc/httpd/conf/httpd.conf
        regexp: '^Listen 80'
        line: Listen 8080

    - name: started httpd service
      service:
        name: httpd
        state: restarted
        enabled: yes

- name: Install Deveploment Tools
  hosts: webservers
  tasks:
    - name: install tools
      yum:
        name: "@Development Tools"
        state: present

- name: upgrade all software and all hosts
  hosts: all
  tasks:
    - name: upgrade software at all hosts
      yum:
        name: '*'
        state: latest