注意：ip.txt和send_ssh_key.sh必须在同一根目录下

# 根据以下格式写入服务器信息ip.txt，用于免密钥登录
#-----------
# ip:password
#192.168.1.110:7758521
#192.168.1.111:7758521
#192.168.1.112:7758521
#-----------
#!/bin/bash
# 生成ssh key
if [[ ! -f "/root/.ssh/id_rsa" ]];then
  echo "gen ssh key"
  ssh-keygen -t rsa -b 2048 -N '' -f /root/.ssh/id_rsa
fi
# 检测是否安装了 expect
if ! expect -v &>/dev/null;then
  echo "install expect"
  yum install expect -y
fi
# 循环文件中的ip
for p in $(cat ip.txt|grep -v '#');do
  ip=$(echo "$p"|cut -f1 -d":")       # 取出当前IP
  password=$(echo "$p"|cut -f2 -d":") # 取出当前密码
  # expect 交互过程
  expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$ip
        expect {
                \"*yes/no*\" {send \"yes\r\"; exp_continue}
                \"*password*\" {send \"$password\r\"; exp_continue}
                \"*Password*\" {send \"$password\r\";}
        }
"