Ansible配置免密登陆

0x01:  把远程服务器的公钥来获取到本地

#ssh-keyscan ip1 ip2 ip3 ip4 >> /root/.ssh/known_hosts

　　完成后，/root/.ssh/known_hosts 多了许多内容

0x02: 添加服务IP到 ansible 的 hosts 

#cat >> /etc/ansible/hosts << EOF
ip1
ip2
ip3
ip4
EOF
#

0x03: 添加免密登录（我的ROOT密码都一样，使用 -k 参数， 然后输入 root 密码）

ansible all -m authorized_key -a "user=root state=present key=\"{{ lookup('file', '/root/.ssh/id_rsa.pub') }} \"" -k

0x04: 验证免密登陆

#ansible all -m ping
172.16.13.5 | SUCCESS => {
    "changed": false, 
    "failed": false, 
    "ping": "pong"
}
172.16.13.15 | SUCCESS => {
    "changed": false, 
    "failed": false, 
    "ping": "pong"
}
172.16.13.6 | SUCCESS => {
    "changed": false, 
    "failed": false, 
    "ping": "pong"
}
172.16.13.8 | SUCCESS => {
    "changed": false, 
    "failed": false, 
    "ping": "pong"
}
172.16.13.9 | SUCCESS => {
    "changed": false, 
    "failed": false, 
    "ping": "pong"
}
#