1、先生成金鑰

[[email protected] ansible]# 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:
d1:d2:99:52:9d:a1:6a:88:2f:11:bb:fe:7e:06:5a:0a

[email protected]
The key's randomart image is:
+--[ RSA 2048]----+
|          ...o   |
|         + +o    |
|    .   + *      |
|     + . =       |
|    + . S        |
|  E  +o.         |
|   .o+..         |
|   .o.  o        |
|    .ooo         |
+-----------------+

2、修改/etc/ansible/ansible.cfg

host_key_checking = False

3、修改/etc/ansible/hosts

[cli1]
193.168.120.80
193.168.120.81
193.168.120.83
193.168.120.85
[cli1:vars]
ansible_ssh_user=root
ansible_ssh_pass=密碼  此處這個群組採用了一樣的密碼
ansible_ssh_port=22

執行命令：ansible cli1 -m  authorized_key  -a "user=root key='{{ lookup('file', '/root/.ssh/id_rsa.pub') }}'"

搞定：

193.168.120.83 | SUCCESS => {
    "changed": true, 
    "comment": null, 
    "exclusive": false, 
    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCjcuK0MQiAN41eGU+2RxjGh+XpO3jWHJwKZp2KhOEL2HmU5gYz8QNlYgmVkLQnaSbICS7zBm9bhzcvEDzMEp6AzM/sIukWMg6fbjSJfz8YJBJh481ytJinHMGE3104zUppXiFqieYv4+43FrNz0dUyZkzubFfbCQ+20ojLVbE0AVUz2LTjg8efei6gqog2ZmIILfzV4ZdiESf9aiHOFxoQCrlAKvrMyHNBB4PPpe6uVi8CE/ll0bVnTQyhHKVrb+uVK7K5YnSVjGmSLsiK6+y2gaDXn+adNWArMeGX+XXdnWEL8yVcWRfAou1CgRpixuX/7A3MorFhud6dHhD80q8/

[email protected]", 
    "key_options": null, 
    "keyfile": "/root/.ssh/authorized_keys", 
    "manage_dir": true, 
    "path": null, 
    "state": "present", 
    "unique": false, 
    "user": "root", 
    "validate_certs": true
}
193.168.120.85 | SUCCESS => {
    "changed": true, 
    "comment": null, 
    "exclusive": false, 
    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCjcuK0MQiAN41eGU+2RxjGh+XpO3jWHJwKZp2KhOEL2HmU5gYz8QNlYgmVkLQnaSbICS7zBm9bhzcvEDzMEp6AzM/sIukWMg6fbjSJfz8YJBJh481ytJinHMGE3104zUppXiFqieYv4+43FrNz0dUyZkzubFfbCQ+20ojLVbE0AVUz2LTjg8efei6gqog2ZmIILfzV4ZdiESf9aiHOFxoQCrlAKvrMyHNBB4PPpe6uVi8CE/ll0bVnTQyhHKVrb+uVK7K5YnSVjGmSLsiK6+y2gaDXn+adNWArMeGX+XXdnWEL8yVcWRfAou1CgRpixuX/7A3MorFhud6dHhD80q8/ [email protected]", 
    "key_options": null, 
    "keyfile": "/root/.ssh/authorized_keys", 
    "manage_dir": true, 
    "path": null, 
    "state": "present", 
    "unique": false, 
    "user": "root", 
    "validate_certs": true
}
193.168.120.80 | SUCCESS => {
    "changed": true, 
    "comment": null, 
    "exclusive": false, 
    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCjcuK0MQiAN41eGU+2RxjGh+XpO3jWHJwKZp2KhOEL2HmU5gYz8QNlYgmVkLQnaSbICS7zBm9bhzcvEDzMEp6AzM/sIukWMg6fbjSJfz8YJBJh481ytJinHMGE3104zUppXiFqieYv4+43FrNz0dUyZkzubFfbCQ+20ojLVbE0AVUz2LTjg8efei6gqog2ZmIILfzV4ZdiESf9aiHOFxoQCrlAKvrMyHNBB4PPpe6uVi8CE/ll0bVnTQyhHKVrb+uVK7K5YnSVjGmSLsiK6+y2gaDXn+adNWArMeGX+XXdnWEL8yVcWRfAou1CgRpixuX/7A3MorFhud6dHhD80q8/ [email protected]", 
    "key_options": null, 
    "keyfile": "/root/.ssh/authorized_keys", 
    "manage_dir": true, 
    "path": null, 
    "state": "present", 
    "unique": false, 
    "user": "root", 
    "validate_certs": true
}
193.168.120.81 | SUCCESS => {
    "changed": true, 
    "comment": null, 
    "exclusive": false, 
    "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCjcuK0MQiAN41eGU+2RxjGh+XpO3jWHJwKZp2KhOEL2HmU5gYz8QNlYgmVkLQnaSbICS7zBm9bhzcvEDzMEp6AzM/sIukWMg6fbjSJfz8YJBJh481ytJinHMGE3104zUppXiFqieYv4+43FrNz0dUyZkzubFfbCQ+20ojLVbE0AVUz2LTjg8efei6gqog2ZmIILfzV4ZdiESf9aiHOFxoQCrlAKvrMyHNBB4PPpe6uVi8CE/ll0bVnTQyhHKVrb+uVK7K5YnSVjGmSLsiK6+y2gaDXn+adNWArMeGX+XXdnWEL8yVcWRfAou1CgRpixuX/7A3MorFhud6dHhD80q8/ [email protected]", 
    "key_options": null, 
    "keyfile": "/root/.ssh/authorized_keys", 
    "manage_dir": true, 
    "path": null, 
    "state": "present", 
    "unique": false, 
    "user": "root", 
    "validate_certs": true
}
[[email protected] ansible]# ssh 193.168.120.85
Last login: Fri Aug 10 19:17:49 2018 from 193.168.120.80
[[email protected] ~]# exit
登出
Connection to 193.168.120.85 closed.
[[email protected] ansible]#