ansible的playbook剧本

如果用模块形式一般有幂等性，如果用shell或者command没有幂等性
playbooks相当于shell的脚本，可以吧执行的任务写到文件当一次执行，方便调用
tasks：一个task相当于是一个play
varobles：变量，一个定义，多次调用
template：模板。可以区分不同主机的特点
handlers：触发器，依赖于前一个任务，前一个任务如果执行改变，那么就会触发handlers
1.vim /etc/ansible/hosts
[zxw]
192.168.126.7 ansible_ssh_user=root ansible_ssh_port=22 ansible_ssh_pass=123
192.168.126.6 ansible_ssh_user=root ansible_ssh_port=22 ansible_ssh_pass=123
~

基本格式

- hosts: zxw
remote_user: root
tasks:
- name: copy httpd.conf
copy: src=name dest=name
- name: restarted httpd
service: name=httpd state=restarted

Vim name.yaml
- hosts: zxw 定义的组 （IP，all，组名）
remote_user: root 主机执行
tasks: 任务
- name: copy httpd.conf 任务名字
copy: src=/etc/httpd/conf/httpd.conf 模块 本地文件 dest=/etc/httpd/conf/httpd.conf 目标文件
- name: restarted httpd
service: name=httpd state=restarted
[root@zxw8 ~]# ansible-playbook host.yaml

192.168.126.7 : ok=3 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
执行3个| 修给2个| 不可达=0 | 失败=0| 跳过=0| 获救=0| 忽略=0

定义变量：
第一种：
- hosts: zxw
remote_user: root
vars:
- file: /etc/httpd/conf/httpd.conf
tasks:
- name: copy httpd.conf
copy: src={{ file }} dest={{ file }}
- name: restarted httpd
service: name=httpd state=restarted
第二种：
vim /etc/ansible/hosts
[zxw:vars]
file= /etc/httpd/conf/httpd.conf
packages=tree2
第三种：
[root@zxw8 ~]# ansible-playbook host.yaml --extra-vars "file=/etc/httpd/conf/httpd.conf "

注册变量:
register注册变量:把date命令输出的结果赋予给date_output

- hosts: zxw
remote_user: root
tasks:
- name: get date
command: date
register: date_output
- name: echo date_output
shell: "echo {{date_output.stdout}} > /root/zxw.txt"
[root@zxw8 ~]# ansible-playbook date.yaml

when语句:
when条件语句:可以根据setup显示出客户端信息为依据来判断
[root@zxw8 ~]# ansible zxw -m setup | more
列出客户端详细信息
- hosts: zxw
remote_user: root
tasks:
- name: mkdir when
command: 'mkdir when'
when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "7"

异常处理:
ignore_errors:如果任务出错，直接跳过，不会影响其他任务

- hosts: zxw
remote_user: root
tasks:
- name: touch zhao
command: 'touch zhao'
ignore_errors: yes
- name: restarted httpd
service: name=httpd state=restarted
ignore_errors: yes

循环语句:
第一种:
{{ item }}:循环创建
创建
- hosts: zxw
remote_user: root
tasks:
- name: add many users
user: name={{ item }} state=present
with_items:
- user1
- user2
- user3
删除：
user: name={{ item }} state=absent
- hosts: zxw
remote_user: root
tasks:
- name: yum many rujian
yum: name={{ item }} state=latest
with_items:
- samba
- vsftpd
- nfs-utils
- rpcbind

第二种:
- hosts: 192.168.254.12
remote_user: root
tasks:
- name: add several user
user: name={{item.name}} state=present groups={{item.groups}}
with_items:
- { name: 'testuser1', groups: 'wheel'}
- { name: 'testuser2', groups: 'root'}
触发器:
handlers:如果执行的任务被改变那么会触发handlers的任务
- hosts: zxw
remote_user: root
tasks:
- name: copy httpd.conf
copy: src=/etc/httpd/conf/httpd.conf dest=/etc/httpd/conf/httpd.conf
notify:
- service httpd restarted
handlers:
- name: service httpd restarted
service: name=httpd state=restarted

模板拷贝:
template，用来区分不同客户端上的特性
- hosts: zxw
remote_user: root
tasks:
- name: copy httpd.conf
template: src=/etc/httpd/conf/httpd.conf dest=/etc/httpd/conf/httpd.conf
notify:
- service httpd restarted
handlers:
- name: service httpd restarted
service: name=httpd state=restarted
[root@zxw8 ~]]# cat /etc/ansible/hosts
[zxw]
192.168.126.7 ansible_ssh_user=root ansible_ssh_port=22 ansible_ssh_pass=123 prot=80
192.168.126.6 ansible_ssh_user=root ansible_ssh_port=22 ansible_ssh_pass=123 prot=80

[root@zxw8 ~]# cat /etc/redhat-release 查看版本
1 .对剧本语法检测：
ansible-playbook --syntax-check  /root/ansible/httpd.yaml
 
2.-C模拟执行剧本：
ansible-playbook  -C /root/ansible/httpd.yaml
 
3.执行剧本：
ansible-playbook   /root/ansible/httpd.yaml
 

示例1：基础

 

 

示例2：变量

 

 

示例3：迭代

 

 

 示例4：触发器notify

 

示例5：模板templates