Ansible学习：（一）Ansible基础

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1.生成密钥：　　
[root@guoxh ~]# ssh-keygen
　　
Generating public/private rsa key pair.
　　
Enter file in which to save the key (/root/.ssh/id_rsa):
　　
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:
　　
74:a2:fc:4d:0c:97:0a:a6:4f:e4:8a:e0:44:f5:4d:d0 root@test
　　
The key's randomart image is:
　　
+--[ RSA 2048]----+
　　
|   . .o.         |
　　
|  . . oE   .     |
　　
| .   .+.+ +      |
　　
|.    * + B       |
　　
|..  . = S o      |
　　
|o. . + . o       |
　　
| .. . . . .      |
　　
|                 |
　　
|                 |
　　
+-----------------+
　　
2.将公钥下发到被管理节点用户的.ssh目录
　　
[root@guoxh ~]# ssh-copy-id -i /root/.ssh/id_rsa.pub  root@192.168.129.130
　　
The authenticity of host '192.168.129.130 (192.168.129.130)' can't be established.
　　
RSA key fingerprint is 0b:2d:68:5f:50:91:06:07:3c:2a:81:05:3c:c5:f9:2b.
　　
Are you sure you want to continue connecting (yes/no)? yes
　　
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
　　
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
　　
root@192.168.129.130's password: ##输入被控端密码
　　

　　
Number of key(s) added: 1
　　

　　
Now try logging into the machine, with:   "ssh 'root@192.168.129.130'"
　　
and check to make sure that only the key(s) you wanted were added.
　　
3.验证无密码配置是否成功
　　
[root@guoxh ~]# ssh root@192.168.129.130
　　
Last login: Sun Apr  9 21:32:33 2017 from 192.168.129.134
　　
[root@test ~]#
　　
给其他被控节点下发公钥步骤同上，这里不做详细说明