[英]Shell script loop through file, ssh into remote server and copy files continue on fail
鑒於以下文件,我無法弄清楚如何繼續迭代遍歷這些行,而不會在內部最遠的ssh命令的第一次失敗時退出。
基本前提是這個腳本ssh到一個定義為INPUT_FILE
的遠程服務器作為USER
並將一堆文件復制到遠程位置進行備份..實際的備份腳本在backup.sh
。 哪個controller.sh
執行。
我的問題是,如果backup.sh拋出一個錯誤,就像cp
的權限被拒絕整個while
循環結束,它將不會連接到我的INPUT_FILE
任何重INPUT_FILE
服務器。 我知道這是因為我故意在各種服務器上設置權限來測試這種情況。
我如何遍歷文件,等待第一個ssh命令完成並強制它轉到下一行而不退出。
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
#!/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
正如您可能已經猜到的那樣, ssh
正在從while循環中獲取您的輸入,這就是它失敗的原因。 實際上我並不是100%肯定為什么-n
在這種情況下不起作用,但我們可以解決它。
由於我沒有備份腳本(也沒有常規設置),所以我簡化了腳本,但我認為總體思路是一樣的。 通過輸入文件獲取服務器信息,並嘗試找到我們可以登錄的服務器,然后看看我們是否可以在那里成功執行腳本
我在一台等待幾秒鍾的遠程機器上調用一個簡單的腳本,並返回exit code
。 您應該向Backup.sh
添加一些退出代碼,以便您可以檢查從遠程命令返回的內容,然后對其進行操作。
因此,通過向while(和</dev/null
)添加花括號 ,並從遠程腳本中檢索退出代碼 ,我可以瀏覽列表,直到成功完成遠程腳本執行:
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
希望能幫助到你
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.