ansible用authorized_key模块批量推送密钥到受控主机(免密登录)(ansible2.9.5)
一,ansible的authorized_key模块的用途
用来配置密钥实现免密登录:
ansible所在的主控机生成密钥后,如何把公钥上传到受控端?
当然可以用ssh-copy-id命令逐台手动处理,如果受控端机器数量不多当然没问题,
但如果机器数量较多,有几十几百台时,手动处理的效率就成为问题。
authorized_key模块就用来把公钥上传到各台服务器实现免密登录
说明:刘宏缔的架构森林是一个专注架构的博客,
网站:https://blog.imgtouch.com
本文: https://blog.imgtouch.com/index.php/2023/05/21/ansibleauthorizedkey-mo-kuai-pi-liang-tui-song-mi-yao-dao-shou-kong-zhu-ji-mian-mi-deng-lu/
对应的源码可以访问这里获取: https://github.com/liuhongdi/
说明:作者:刘宏缔 邮箱: 371125307@qq.com
二,authorized_key的使用例子:
1,在hosts中增加一个段:
[ils] 121.122.123.87:12888 ansible_ssh_user=webop ansible_ssh_pass="weboppass" 121.122.123.88:12888 ansible_ssh_user=webop ansible_ssh_pass="weboppass" 121.122.123.89:12888 ansible_ssh_user=webop ansible_ssh_pass="weboppass"
批量上传公钥
[root@centos8 ~]# ansible ils -m authorized_key -a "user=webop state=present key='{{ lookup('file', '/home/liuhongdi/.ssh/id_rsa.pub') }}'"
出现报错:
121.122.123.87 | FAILED! => { "msg": "Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support this. Please add this host's fingerprint to your known_hosts file to manage this host." }
问题的原因:
ssh第一次连接的时候一般会提示fingerprint key字符串,需要输入yes 进行确认.
确认后会把key字符串加入到 ~/.ssh/known_hosts
文件中
解决办法:
修改ansible的配置文件:
[root@centos8 ~]# vi /etc/ansible/ansible.cfg
把这一行的注释去掉:
host_key_checking = False
说明:这一行的作用:
# uncomment this to disable SSH key host checking
用来禁止ssh的指纹key字串检查
2,再次上传公钥到服务器:
[root@centos8 ~]# ansible ils -m authorized_key -a "user=webop state=present key='{{ lookup('file', '/home/liuhongdi/.ssh/id_rsa.pub') }}'" 121.122.123.87 | CHANGED => {
成功了
手动测试一下:看ssh到目标服务器是否还需要输入密码?
[root@centos8 ~]# ssh -p 12888 webop@121.122.123.87
三,查看ansible版本
[root@centos8 liuhongdi]# ansible --version ansible 2.9.5