Shell scripts

Check multiple websites' status.

[ Note: First copy the check_http plugin in /usr/lib/nagios/plugins/ path ]

#!/bin/bash

#####

#Script will check all given websites and give status by the help of check_http plugin

#Created by Shankar Patel

#Create date :10-10-2012

#######################################################################

F_P=""
msg_ok=""
exit_status=0

#also you can create a file with the list of websites and 

#SITES_LIST="file_name_of_list_websites"

#for WEB in $(cat $SITES_LIST)
for WEB in {staging.sabsebolo.com,staging.sabsetalk.com,google.com,yyyyyyyyyyyyyyyyahoo.com}
do
/usr/lib/nagios/plugins/check_http $WEB > /dev/null
result_check=$?
if [ "$result_check" -ne 0 ] ; then
       F_P="$F_P $WEB"
       exit_status=2
else
       msg_ok="$msg_ok $WEB"
       exit_status=0
fi
done
if [ "$F_P" = "" ]
then
      echo "OK. All Websites are OK."
else
      echo "CRITICAL. $F_P websites showing down. and $msg_ok are up."
      exit $exit_status;
fi

Script Daily Backup To remote location

#!/bin/bash

SSHKEY=/backup/id_rsa

TOBACKUP=$1

HOSTNAME=$(hostname)

TODAY=`date +%Y%m%d`

check_time=0

tar_done=1

tar_done=1

#create tar file

tak_bkp()

{

 if [ "$check_bkp" -lt 4 ]

 then

        scp -o StrictHostKeyChecking=no -i $SSHKEY /backup/${HOSTNAME}_${TODAY}.tar.gz incoming-backup@heimdall:/mnt/datastore1/incoming-backup/ > /backup/backup_done

        [ "$?" -eq 0 ] && rm /backup/${HOSTNAME}_${TODAY}.tar.gz && exit 0 || check_bkp=$(($check_bkp+1)) && tak_bkp ;

 else

        echo -e "Can not create BKP file! \n ackup not done properly" > /backup/backup_done

        exit 2;

 fi

}

create_tar()

{

 if [ "$check_tar" -lt 4 ]

 then

   tar -cpzf /backup/${HOSTNAME}_${TODAY}.tar.gz --exclude="${HOSTNAME}_${TODAY}.tar.gz" --one-file-system  $TOBACKUP

   [ "$?" -eq 0 ] && tak_bkp

   check_time=$(($check_time+1))

 else

        echo -e "Can not create tar file! \nbackup not done properly" > /backup/backup_done

        exit 2;

 fi

}

create_tar

Script to check backup done or not 

#!/bin/bash

#####

#Script will check backup copied or not on remote location.

#Created by Shankar Patel

#Create date :10-10-2012

#######################################################################

TODAY=`date +%Y%m%d --date="1 day ago"`

bkp_exist=`ssh -o StrictHostKeyChecking=no -i /backup/id_rsa incoming-backup@heimdall "ls /mnt/datastore1/incoming-backup/${HOSTNAME}_${TODAY}.tar.gz &>/dev/null && echo -e 'OK' || echo -e 'CRITICAL'" 2>/dev/null`

[ "$bkp_exist" == "OK" ] && echo "OK. Yesterday's backup done."  && exit 0

[ "$bkp_exist" == "CRITICAL" ] &&  echo "CRITICAL. Yesterday's backup done." && exit 2

Nagios plugin to check Openfiles

check_openfiles.sh 

if it is greater then 85% then it will show warning

if it is greater then 90% then it will show warning

otherwise it will show ok. 

#!/bin/bash

###########

# This script will check no open files and if open files will be greater then 85% of max-open-files then it will show warning and open files will be greater then 90% then it will show critical.

#

# It does not require any additional perameter at execution time

# it automatically takes perameter from system files

########### Shankar Patel 22/08/1012

open_files=`cat /proc/sys/fs/file-nr | awk '{print $1}'`

max_open_files=`cat /proc/sys/fs/file-nr | awk '{print $3}'`

warn_of=$(($max_open_files*15/100))

crit_of=$(($max_open_files*10/100))

if [ "$open_files" -lt "$warn_of" ]

then

echo "OK. Number of open files = $open_files | openfiles= $open_files"

exit 0;

elif [ "$open_files" -gt "$warn_of" ] && [ "$open_files" -lt "$crit_of" ]

then

echo "WARNING. Number of open files = $open_files | openfiles= $open_files"

exit 1;

else

echo "CRITICAL. Number of open files = $open_files | openfiles= $open_files"

exit 2;

fi

Script to monitor log file error.

#!/bin/bash

FILE2TAIL=$1

PATTERN=$2

CATCH_UP=0

FPATH=$(dirname $1)

FFILE=$(basename $1)

INODE_NUM=$(ls -i ${FPATH}/${FFILE} | awk '{ print $1 }')

PATTERN_CODE="$(echo -n "$PATTERN"|tr -d \* | tr -d ' ' | tr -d \. )"

FSIZE_FILE=${FPATH}/.${FFILE}_${PATTERN_CODE}_${INODE_NUM}.size

SIZE_CURRENT=$(ls -l ${FPATH}/${FFILE} | awk '{ print $5 }')

exit_status=0

last_exit()

{

# save current size

ls -l ${FPATH}/${FFILE} | awk '{ print $5 }' > ${FSIZE_FILE}

exit $exit_status

}

if [ ! -f ${FSIZE_FILE} ]; then

# first time, save line count

echo "saving initial size of ${FPATH}/${FFILE}"

last_exit

fi

# last size is available

SIZE_LAST=$(cat ${FSIZE_FILE})

SIZE_DELTA=$(($SIZE_CURRENT - $SIZE_LAST))

if [ $SIZE_DELTA -gt 0 ]

then

# new bytes to scan

tail "-${SIZE_DELTA}c" ${FPATH}/${FFILE} > /tmp/ts$$

egrep "$PATTERN" /tmp/ts$$ > /tmp/tsF$$

GREP_STATUS=$?

if [ $GREP_STATUS -eq 0 ]

then

# found a match

SUBJECT="Found $PATTERN in $FILE2TAIL"

BODY="$SUBJECT\n$(cat /tmp/tsF$$)"

echo "$SUBJECT"

#### exec

#cho -e $BODY # | $EXEC_ON_MATCH -s "$SUBJECT" $EMAILADDR

echo "CRITICAL. 'Error writing data to the connection' found in ${FFILE} | error_found=1"

last_exit

fi

if [ $GREP_STATUS -ne 0 ]

then

# found no matches

SUBJECT="Missing $PATTERN in $FILE2TAIL on $HOST_NAME"

BODY="$SUBJECT\n"

echo "OK. 'Error writing data to the connection' not found in ${FFILE} | error_found=0"

last_exit

#### exec

fi

/bin/rm -f /tmp/ts$$ /tmp/tsF$$

fi