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Shell脚本循环遍历文件,ssh进入远程服务器并且复制文件继续失败

[英]Shell script loop through file, ssh into remote server and copy files continue on fail

鉴于以下文件,我无法弄清楚如何继续迭代遍历这些行,而不会在内部最远的ssh命令的第一次失败时退出。

基本前提是这个脚本ssh到一个定义为INPUT_FILE的远程服务器作为USER并将一堆文件复制到远程位置进行备份..实际的备份脚本在backup.sh 哪个controller.sh执行。

我的问题是,如果backup.sh抛出一个错误,就像cp的权限被拒绝整个while循环结束,它将不会连接到我的INPUT_FILE任何重INPUT_FILE服务器。 我知道这是因为我故意在各种服务器上设置权限来测试这种情况。

我如何遍历文件,等待第一个ssh命令完成并强制它转到下一行而不退出。

controller.sh

INPUT_FILE=$1
USER=$2
SCRIPT_DIR=/opt/sapdownloads/MikesUtilities/backups
BACKUP_DIR=$SCRIPT_DIR/data
DATE=`date +%m%d%y`
LOG_FILE=$SCRIPT_DIR/logs/backup.controller.log


##
# Create The Log dir and log files
##
function log(){
   echo -e ${*}
   echo -e "[${USER}][`date`] - ${*}" >> ${LOG_FILE}
}


#Iterate through the input file line by line

cat $INPUT_FILE | while read l;do {
   #Split the line by spaces into an array
   line=($l)
   #make sure server is lower case
   SERVER=`echo ${line[1]} | tr [:lower:] [:upper:]`
   #make sure tier is uppercase
   TIER=`echo ${line[0]} | tr [:upper:] [:lower:]`
   log "###################################"
   log "#  Tier: $TIER | SERVER: $SERVER  #"
   log "###################################"
   log "Making Sure we can login to the Server"
   CHK=`ssh -t -q -o "BatchMode yes" -o "ConnectTimeout 5" -l $USER $SERVER "echo success"`;
   if [ "success" = $CHK ] >/dev/null 2>&1
   then
      CPDIR=$BACKUP_DIR/$TIER/$SERVER/$DATE
      log "Creating new backup directories in $CPDIR"
      #make the new backup directory in $BACKUP_DIR
      mkdir -p $BACKUP_DIR/$TIER/$SERVER/$DATE/etc
      mkdir -p $BACKUP_DIR/$TIER/$SERVER/$DATE/home


      log "Executing Remote Backup Script"
      ret=`ssh -n -t -q -o "BatchMode yes" -o "ConnectTimeout 5" -l $USER $SERVER "/bin/bash $SCRIPT_DIR/backup.sh $CPDIR; echo $?"`
      echo "return: [$ret]"
      if [ $ret -eq 0 ]; then
         echo "Success. Aborting"
         break
      fi
   else
      printf "${i}\tUnable to connect to host\n" >> $ERRORS;
   fi
} </dev/null; done

backup.sh

#!/bin/bash
CPDIR=$1
DATE=`date +%m%d%y`
SCRIPT_DIR=/opt/sapdownloads/MikesUtilities/backups
LOG_FILE=$SCRIPT_DIR/logs/backup.log
SIDADM_HOME=/home/${sapsid}adm
ORASID_HOME=/home/ora${sapsid}
ORACLE_HOME=/home/oracle
cpErrors=()
message=""
SENDTO="joe@example.com"
SENDFROM="team@example.com"

##
# Create The Log dir and log files
##
function log(){
   #echo -e ${*}
   echo -e "[${USER}][`date`] - ${*}" >> ${LOG_FILE}
}

function compileMessage(){
   message="Unable to CP one or more files from the server $HOSTNAME \n\n"
   for i in "${cpErrors[@]}"
   do
      message+="${i}\n"
   done
}

function sendMail(){
   compileMessage

   echo -e $message | mail -s "OS Backup Errors" -r $SENDFROM $SENDTO
}

cd /etc
#copy fstab
if [ -d "oratab" ]; then
   log "Copying oratab to $CPDIR/etc"
   cp oratab $CPDIR/etc
fi
#Copy fstab
if [ -d "fstab" ]; then
   log "Copying fstab to $CPDIR/etc"
   cp fstab $CPDIR/etc
fi

#make sure that folder exists first
if [ -d "$ORASID_HOME" ]; then

   #Test to make sure we can access the folder
   if [ -w "$ORASID_HOME" ]; then
      log "Copying $ORASID_HOME to $CPDIR/home"
      cp -rf $ORASID_HOME $CPDIR/home
   else
      #if we cant access that folder, send an email
      log "Unable to cp $ORASID_HOME to $CPDIR/home"
      cpErrors+=($ORASID_HOME)
   fi

fi

#make sure that folder exists first
if [ -d "$SIDADM_HOME" ]; then

   #Test to make sure we can access the folder
   if [ -w "$SIDADM_HOME" ]; then
      log "Copying $SIDADM_HOME to $CPDIR/home"
      cp -rf $SIDADM_HOME $CPDIR/home
   else
      #if we cant access that folder, send an email
      log "Unable to cp $SIDADM_HOME to $CPDIR/home"
      cpErrors+=($SIDADM_HOME)
   fi

fi

#make sure that folder exists first
if [ -d "$ORACLE_HOME" ]; then

   #Test to make sure we can access the folder
   if [ -w "$ORACLE_HOME" ]; then
      log "Copying $ORACLE_HOME to $CPDIR/home"
      cp -rf $ORACLE_HOME $CPDIR/home
   else
      #if we cant access that folder, send an email
      log "Unable to cp $ORACLE_HOME to $CPDIR/home"
      cpErrors+=($ORACLE_HOME)
   fi

fi


if [ ${#cpErrors[@]} != 0 ]; then
   log "Sending Email of cp errors"
   sendMail
fi

正如您可能已经猜到的那样, ssh正在从while循环中获取您的输入,这就是它失败的原因。 实际上我并不是100%肯定为什么-n在这种情况下不起作用,但我们可以解决它。

由于我没有备份脚本(也没有常规设置),所以我简化了脚本,但我认为总体思路是一样的。 通过输入文件获取服务器信息,并尝试找到我们可以登录的服务器,然后看看我们是否可以在那里成功执行脚本

我在一台等待几秒钟的远程机器上调用一个简单的脚本,并返回exit code 您应该向Backup.sh添加一些退出代码,以便您可以检查从远程命令返回的内容,然后对其进行操作。

因此,通过向while(和</dev/null )添加花括号 ,并从远程脚本中检索退出代码 ,我可以浏览列表,直到成功完成远程脚本执行:

cat $INPUT_FILE | while read l;do {

SERVER=($l)
CHK=`ssh -t -q -o "BatchMode yes" -o "ConnectTimeout 5" -l $USER $SERVER "echo success"`;

if [ "success" = $CHK ] >/dev/null 2>&1
then
  ret=`ssh -n -t -q -o "BatchMode yes" -o "ConnectTimeout 5" -l $USER $SERVER '/home/username/timer.sh testvar;echo $?'`
  echo "return: [$ret]"
  if [ $ret -eq 0 ]; then
       echo "Success. Aborting"
       break
  fi
else
  printf "${i}\tUnable to connect to host\n";
fi
} < /dev/null; done

希望能帮助到你

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