ansible安装

一、环境

服务器	IP
服务器1	192.168.109.66
服务器2	192.168.109.77
服务器3	192.168.109.88

二、部署

服务器1
服务器2
服务器3

#关闭防火墙
systemctl stop firewalld
setenforce 0

服务器1

#安装相关软件
yum install epel-release.noarch  -y
yum install ansible -y
yum install tree -y

#查看/etc/ansible结构
[root@server ~]#tree /etc/ansible/
/etc/ansible/
├── ansible.cfg
├── hosts
└── roles

1 directory, 2 files

#改主机清单hosts文件
[root@server ~]#vim /etc/ansible/hosts 

[webserver]
192.168.109.77
[mysql]
192.168.109.88

#生成密钥对
ssh-keygen -t rsa

[root@server ~]#ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:l4hBEirTzCocarEKNuZce07s0CwDehhwJWBiIQPFrOk root@server
The key's randomart image is:
+---[RSA 2048]----+
|BO+ +..          |
|==o+ o           |
|+=*   .          |
|*=+    o . .     |
|BO .  . S o      |
|@E+ =    .       |
|+o.= *           |
| .  O            |
|     o           |
+----[SHA256]-----+

#将公钥推给其他服务器
[root@server .ssh]#ssh-copy-id root@192.168.109.77

[root@server .ssh]#ssh-copy-id root@192.168.109.88

服务器2
服务器3

#查看服务器2、3是否有公钥
[root@localhost ~]#cd .ssh
[root@localhost .ssh]#ls
authorized_keys

三、连接访问

服务器1

[root@server .ssh]#ansible webserver -m command -a 'date'
Enter passphrase for key '/root/.ssh/id_rsa': 
192.168.109.77 | CHANGED | rc=0 >>
2021年 04月 06日 星期二 08:51:34 CST

[root@server .ssh]#ansible mysql -m command -a 'date'
Enter passphrase for key '/root/.ssh/id_rsa': 
192.168.109.88 | CHANGED | rc=0 >>
2021年 04月 06日 星期二 08:52:26 CST

#前面每次都要密码，这可以做免交互代理
[root@server .ssh]#ssh-agent bash
[root@server .ssh]# ssh-add
Enter passphrase for /root/.ssh/id_rsa: 
Identity added: /root/.ssh/id_rsa (/root/.ssh/id_rsa)

做完免交互不需要密码直接执行