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ansible-op's Introduction

个人常用 ansible 脚本

快速开始

# 安装依赖
$ ansible-galaxy install -r requirements.yml

# 安装 playbook
$ ansible-playbook -i hosts git.yml

Q&A

如何得知所有的目标机器是否可达

$ ansibel all -m ping

如何得知所有的目标机器的发行版

$ ansible all -m setup

如何在所有目标机器上执行命令

$ ansible all -a pwd

一个 task 如何根据条件执行

添加参数 when 作为分支条件

# 当在国内时,选择阿里云镜像
- name: add docker repo -> aliyun
  shell: yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
  when: ansible_date_time.tz_offset == "+0800"
  args:
    creates: /etc/yum.repos.d/docker-ce.repo 

如果一个 task 执行错误,如何忽略错误使它继续执行下去

添加参数 ignore_errors: true 忽略错误

如何根据一个 task 的执行结果来决定是否执行其它 task

使用 register 来监听当前任务的执行情况,使用 when 设定条件

为什么使用 git,file 等模块比直接执行 shell 要好些

git,file 能够更好地满足幂等性

ansible 注意点

  • 在使用相关 ansible 模块前请先确认是否满足 requirements

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