ansible=playbook

[root@ansible roles]# cat web.yml 
- hosts: web
  remote_user: root
  
  tasks:
    - name: create file
      file: name=/tmp/new.file state=touch
    - name: create new user
      user: name=test2 system=yes shell=/sbin/nologin
    - name: install package
      yum: name=httpd  state=installed
    - name: copy html
      copy: src=/root/index.html dest=/var/www/html/index.html
    - name: start service
      service: name=httpd state=started enabled=yes

添加httpd index文件

[root@ansible ~]# cat index.html
123

测试访问

[root@ansible ~]# curl 10.0.0.8
123

1. --limit　　选则组里的某台机器执行命令

ansible web -m ping --limit 10.0.0.7   
# 只在web组的 10.0.0.7上执行ping 

1. --list-tasks　　查看任务列表

[root@ansible roles]# ansible-playbook web.yml --list-tasks

playbook: web.yml

play #1 (web): web TAGS: []
tasks:
create file TAGS: []
create new user TAGS: []
install package TAGS: []
copy html TAGS: []
start service TAGS: []

1. handlers 和notify 结合重启服务

"web.yml" 20L, 546C 12,7 All
- hosts: web
remote_user: root

tasks:
- name: install package
yum: name=httpd state=installed
- name: copy html
copy: src=file/httpd.conf dest=/etc/httpd/conf/ backup=yes
notify: restart httpd
- name: start httpd
service: name=httpd state=started enabled=yes

handlers:
- name: restart httpd
service: name=httpd state=restarted enabled=yes

变量

- setup 查看内置变量

过滤变量 -setup -a 'ilter =变量'

[root@ansible roles]# ansible web -m setup -a 'filter=*addr'
10.0.0.8 | SUCCESS => {
    "ansible_facts": {}, 
    "changed": false
}

#支持 通配符 *号
[root@ansible roles]# ansible web -m setup -a 'filter=*ipv4'
10.0.0.8 | SUCCESS => {
    "ansible_facts": {
        "ansible_default_ipv4": {
            "address": "10.0.0.8", 
            "alias": "eth0", 
            "broadcast": "10.0.0.255", 
            "gateway": "10.0.0.2", 
            "interface": "eth0", 
            "macaddress": "00:0c:29:24:58:ed", 
            "mtu": 1500, 
            "netmask": "255.255.255.0", 
            "network": "10.0.0.0", 
            "type": "ether"
        }
    }, 
    "changed": false
}

playbook中定义引用变量

[root@ansible roles]# cat app.yml
- hosts: web
  remote_user: root
  
  tasks:
    - name: install package
      yum: name={{ pkname }}  state=installed
    - name: start httpd
      service: name={{ pkname }} state=started enabled=yes

　　　　命令行中 -e 调用playbook 中的变量    变量优先级 1

ansible-playbook -e 'pkname=redis' -C  app.yml

　　　　vars:playbook中定义变量  yum模块直接引用变量

- hosts: web
  remote_user: root
  vars:
    - pkname1: httpd
    - pkname2: mysql

  tasks:
    - name: install package
      yum: name={{ pkname1 }}  state=installed
    - name: install package
      yum: name={{ pkname2 }}  state=installed

　　　　

主机清单变量

　　　　　对组内主机定义不同变量此时 内的主机会有不同的端口   　　　　变量优先级 2

[web]　　　　
10.0.0.52 http_port=10080　　　　#只对 52主机生效
10.0.0.53 http_port=8080　　　　 #只对 53生效

  　　

　　　　　　对组内的主机定义相同的变量　　　　　　　　　　　　　　变量优先级 3

比如web组里有1000个主机,要写端口为2020,就得写1000个,下面给web组设置个变量写好端口

省的重复在web里写http_prot=2020

[web]
10.0.0.51
10.0.0.52
10.0.0.53

[web:vars]
http_prot=2020   对web组的所有主机生效