一、脚本说明

1、在任意节点上，以root用户执行该脚本

2、脚本中的数组变量：

1）array_user：控制要进行互信的用户，该脚本中使用的是（root，highgo）

2）array_node：控制要互信的节点的hostname

3）需要在执行脚本的当前目录下创建log目录，以存放互信过程中的日志

4）该脚本中，用户密码均为123456

二、脚本内容

#!/bin/bash

array_user=(root highgo)
#array_user=(highgo)
array_node=(gtm gtm_standby node1 node2)

function expect_root {
/usr/bin/expect << EOF
   spawn /usr/bin/ssh {1}@{2}
   expect {
     "yes/no" {send "yes\r"; exp_continue}
     "*assword:" {send "123456\r"}
   }
 
   expect {
     "*#" {
       send "/usr/bin/ssh-keygen -t rsa\r";
         expect {
           "*id_rsa):" {send "\n"; exp_continue}
           "(y/n)?" {send "y\r"; exp_continue}
           "passphrase" {send "\n"; exp_continue}
           "again:" {send "\n"}
         }
     }
   }
   expect {
     "*#" {
       send "/usr/bin/scp {3}/.ssh/id_rsa.pub root@gtm :/opt/ssh/id_{1}_{2}.pub\r";
         expect {
           "yes/no" {send "yes\r"; exp_continue}
           "*assword:" {send "123456\r"}
         }
     }
   }
   expect {
     "*#" {send "exit\n\r"}   
   }
EOF
}

function expect_user {
/usr/bin/expect << EOF
   spawn /usr/bin/ssh {1}@{2}
   expect {
     "yes/no" {send "yes\r"; exp_continue}
     "*assword:" {send "123456\r"}
   }
   expect {
     "] " {
       send "/usr/bin/ssh-keygen -t rsa\r";
         expect {
           "*id_rsa):" {send "\n"; exp_continue}
           "(y/n)?" {send "y\r"; exp_continue}
           "passphrase" {send "\n"; exp_continue}
           "again:" {send "\n"}
         }
     }
   }   
   expect {
     "] " {
       send "/usr/bin/scp {3}/.ssh/id_rsa.pub root@gtm :/opt/ssh/id_{1}_{2}.pub\r";
         expect {
           "yes/no" {send "yes\r"; exp_continue}
           "*assword:" {send "123456\r"}
         }
     }
   }
   expect {
     "] " {send "exit\n\r"}
   }
EOF
}

function expect_to {
/usr/bin/expect << EOF
  spawn /usr/bin/scp /opt/ssh/authorized_keys {1}@{2}:{3}/.ssh/
  expect {
    "yes/no" {send "yes\r"; exp_continue}
    "*assword:" {send "123456\r"}
  }   
  expect "100%"
EOF
}

for user in `echo {array_user[@]}`
do
  for node in `echo {array_node[@]}`
  do
    touch /opt/ssh/id_{user}_{node}.pub
    cat /dev/null > /opt/ssh/id_{user}_{node}.pub
        if [ "{user}" = "root" ]; then
          user_home=/root
          expect_root {user} {node} {user_home} > ./log/create_{user}_{node}.log 2>&1
        else
          user_home=/home/{user}
          expect_user {user} {node} {user_home} > ./log/create_{user}_{node}.log 2>&1
        fi;        
    done;
done;

cat /dev/null > /opt/ssh/authorized_keys
cat /opt/ssh/id_*.pub > /opt/ssh/authorized_keys
for user in `echo {array_user[@]}`
do
  for node in `echo {array_node[@]}`
  do
        if [ "{user}" = "root" ]; then
          user_home=/root
        else
          user_home=/home/{user}
        fi;
        expect_to {user} {node} {user_home} > ./log/to_{user}_{node}.log 2>&1
  done;
done;