【转】Shell脚本：节点互信并修改主机名

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Shell脚本：节点互信并修改主机名

原文连接

该脚本来自：批量建立linux机器之间的ssh互信的自动化脚本

节点互信

一共3个节点。

MasterNode：192.168.1.1

SlaveNode1：192.168.1.2

SlaveNode2：192.168.1.3

节点之间保证网络畅通，并且MasterNode 与SlaveNode SSH 授信。

在MasterNode执行如下脚本：

ssh ssh_auth.sh root root "/xxx/iplist"

iplist文件列表：

1
2
192.168.1.2
192.168.1.3

脚本接受3个参数：分别是远程机器的用户名root ，远程机器的密码root ，ip列表的文件路径/xxx/iplist

注意：远程的所有节点的用户名密码必须一致。

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#!/bin/sh
DEST_USER=$1
PASSWORD=$2
HOSTS_FILE=$3
if [ $# -ne 3 ]; then
    echo "Usage:"
    echo "$0 remoteUser remotePassword hostsFile"
    exit 1
fi
SSH_DIR=~/.ssh
SCRIPT_PREFIX=./tmp
echo ===========================
# 1. prepare  directory .ssh
mkdir $SSH_DIR
chmod 700 $SSH_DIR
# 2. generat ssh key
TMP_SCRIPT=$SCRIPT_PREFIX.sh
echo  "#!/usr/bin/expect">$TMP_SCRIPT
echo  "spawn ssh-keygen -b 1024 -t rsa">>$TMP_SCRIPT
echo  "expect *key*">>$TMP_SCRIPT
echo  "send \r">>$TMP_SCRIPT
if [ -f $SSH_DIR/id_rsa ]; then
    echo  "expect *verwrite*">>$TMP_SCRIPT
    echo  "send y\r">>$TMP_SCRIPT
fi
echo  "expect *passphrase*">>$TMP_SCRIPT
echo  "send \r">>$TMP_SCRIPT
echo  "expect *again:">>$TMP_SCRIPT
echo  "send \r">>$TMP_SCRIPT
echo  "interact">>$TMP_SCRIPT
chmod +x $TMP_SCRIPT
/usr/bin/expect $TMP_SCRIPT
rm $TMP_SCRIPT
# 3. generat file authorized_keys
cat $SSH_DIR/id_rsa.pub>>$SSH_DIR/authorized_keys
# 4. chmod 600 for file authorized_keys
chmod 600 $SSH_DIR/authorized_keys
echo ===========================
# 5. copy all files to other hosts
for ip in $(cat $HOSTS_FILE)  
do
    if [ "x$ip" != "x" ]; then
        echo -------------------------
        TMP_SCRIPT=${SCRIPT_PREFIX}.$ip.sh
        # check known_hosts
        val=`ssh-keygen -F $ip`
        if [ "x$val" == "x" ]; then
            echo "$ip not in $SSH_DIR/known_hosts, need to add"
            val=`ssh-keyscan $ip 2>/dev/null`
            if [ "x$val" == "x" ]; then
                echo "ssh-keyscan $ip failed!"
            else
                echo $val>>$SSH_DIR/known_hosts
            fi
        fi
        echo "copy $SSH_DIR to $ip"
                
        echo  "#!/usr/bin/expect">$TMP_SCRIPT
        echo  "spawn scp -r  $SSH_DIR $DEST_USER@$ip:~/">>$TMP_SCRIPT
        echo  "expect *assword*">>$TMP_SCRIPT
        echo  "send $PASSWORD\r">>$TMP_SCRIPT
        echo  "interact">>$TMP_SCRIPT
        
        chmod +x $TMP_SCRIPT
        #echo "/usr/bin/expect $TMP_SCRIPT" >$TMP_SCRIPT.do
        #sh $TMP_SCRIPT.do&
    
        /usr/bin/expect $TMP_SCRIPT
        rm $TMP_SCRIPT
        echo "copy done."                
    fi
done
echo done.

临时修改主机名（/etc/hosts）

修改MasterNode的hosts，如下：

1
2
3
192.168.1.1 MasterNode
192.168.1.2 SlaveNode1
192.168.1.3 SlaveNode2

执行如下脚本：

1
2

永久修改主机名（/etc/sysconfig/network）

执行如下脚本：

1
2