- hosts: httpdremote_user: roottasks:- name: install httpdyum: name=httpd state=present- name: start httpd serviceservice: name=httpd state=started

fruits:- Apple- Orange- Strawberry- Mango或者：
fruits: ['Apple', 'Orange', 'Strawberry', 'Mango']

martin:name: Martin D'vloperjob: Developerskill: Elite
或者
martin: {name: Martin D'vloper, job: Developer, skill: Elite}

[root@localhost ~]# ssh-keygen -t rsa       <== 建立密钥对，-t代表类型，有RSA和DSA两种
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):   <==密钥文件默认存放位置，按Enter即可
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):     <== 输入密钥锁码，或直接按 Enter 留空
Enter same passphrase again:     <== 再输入一遍密钥锁码
Your identification has been saved in /root/.ssh/id_rsa.    <== 生成的私钥
Your public key has been saved in /root/.ssh/id_rsa.pub.    <== 生成的公钥
The key fingerprint is:
SHA256:K1qy928tkk1FUuzQtlZK+poeS67vIgPvHw9lQ+KNuZ4 root@localhost.localdomain
The key's randomart image is:
+---[RSA 2048]----+
|           +.    |
|          o * .  |
|        . .O +   |
|       . *. *    |
|        S =+     |
|    .    =...    |
|    .oo =+o+     |
|     ==o+B*o.    |
|    oo.=EXO.     |
+----[SHA256]-----+
--------------------- 传输公钥：传输公钥时ip地址后面不见任何东西，默认会在/root下生成.shh,并把公钥传在他的下面

[root@localhost ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub root@172.16.8.11

参数名              是否必须   默认值     选项值                   参数说明
conf_file       不                                  设定远程yum执行时所依赖的yum配置文件
disable_gpg_check   不       No           Yes/No                在安装包前检查包，只会影响state参数为present或者latest的时候
list                No                                 只能由ansible调用，不支持playbook，这个干啥的大家都懂
name               Yes                                 你需要安装的包的名字，也能如此使用name=python=2.7安装python2.7
state              no      present  present/latest/absent  用于描述安装包最终状态，present/latest用于安装包，absent用于remove安装包
update_cache       no      no           yes/no                 用于安装包前执行更新list,只会影响state参数为present/latest的时候

名称        必选        默认值   可选值                                备注
argument       no                                                如果打开这个标记，backrefs会改变模块的一些操作：insertbefore和insertafter参数会被忽略。当regexp不匹配文件中的任何行时，文件不会做任何修改，否则 使用扩展的line参数 替换 最后一个匹配正则表达式的行
enabled        no       yes/no                                       服务是否开机自动启动。enabled和state至少要有一个被定义
name           yes                                               服务名称
pattern        no                                                如果服务没有响应，则ps查看是否具有指定参数的进程，有则认为服务已经启动
sleep          no       EOF          EOF/*regex*                         如果服务被重新启动，则睡眠多少秒再执行停止和启动命令
state          no                started,stopped,restarted,reloaded   service最终操作后的状态

- hosts: mysqldremote_user: roottasks:- name: install mysqldyum: name=mysql state=present- name: install mysql-develyum: name=mysql-devel state=present- name: install mysql-serveryum: name=mysql-server state=present- name: start mysqld serviceservice: name=mysqld state=started

- hosts: mariadbremote_user: roottasks:- name: install mariadbyum: name=mariadb-server state=present- name: start mariadb serviceservice: name=mariadb state=started

-------------------------------------------------------

- hosts: mariadb
remote_user: root
tasks:
- name: install mariadb
yum: name=mariadb-server state=present
- name: start mariadb service
systemd: name=mariadb state=started

用systemd或者service模块都可以（都实验成功）