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"
}
#
原文：https://www.cnblogs.com/fanlong0212/p/12185355.html