多机免密登录自动化脚本

yum -y install expect    // 自动交互服务

// 生产公钥
ssh-keygen -t rsa -P "" -f /root/.ssh/id_rsa



// 修改ip和主机名成需要免密的机器

for i in 192.168.178.100 192.168.178.140 k8s_master k8s_node2;do
expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
    expect {
        \"*yes/no*\" {send \"yes\r\"; exp_continue}
        \"*password*\" {send \"password\r\"; exp_continue}
        \"*Password*\" {send \"password\r\";}
    } "
done

　　

验证测试：

[root@k8s_node1 ~]# ssh 192.168.178.100
Last login: Tue May 11 19:48:50 2021 from k8s_node1
[root@k8s_master ~]# ssh k8s_node2
Last login: Tue May 11 19:48:27 2021 from 192.168.178.130