check_webservice_load.sh: add parameter 'CONFLICTING_SCRIPTS' - don't run if a conflicting other script is currently running.
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@@ -1,8 +1,15 @@
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#!/usr/bin/env bash
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script_name="$(basename $(realpath $0))"
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working_dir="$(dirname $(realpath $0))"
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conf_file="${working_dir}/conf/check_webservice_load.conf"
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# - Lock directory exists, until the script ends. So
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# - we can check, if a previos instanze is already running.
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# -
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LOCK_DIR="/tmp/${script_name%%.*}.LOCK"
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#LOCK_DIR=`mktemp -d`
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#---------------------------------------
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#-----------------------------
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@@ -24,12 +31,6 @@ check_website=false
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ommit_curl_check_nginx=false
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vserver_guest=false
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# - Lock directory exists, until the script ends. So
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# - we can check, if a previos instanze is already running.
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# -
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#LOCK_DIR=/tmp/check_webservice.lock
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LOCK_DIR=`mktemp -d`
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#---------------------------------------
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#-----------------------------
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@@ -136,42 +137,6 @@ trim() {
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echo -n "$var"
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}
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## - #---------------------------------------
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## - #-----------------------------
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## - # Job is already running?
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## - #-----------------------------
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## - #---------------------------------------
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## -
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## - ## - If job already runs, stop execution..
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## - ## -
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## - if mkdir "$LOCK_DIR" 2> /dev/null ; then
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## -
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## - ## - Remove lockdir when the script finishes, or when it receives a signal
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## - trap 'rm -rf "$LOCK_DIR"' 0 2 15
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## -
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## - else
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## -
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## - datum=`date +"%d.%m.%Y"`
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## -
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## - msg="[ Error ]: A previos instance of \"`basename $0`\" seems already be running.\n\tExiting now.."
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## -
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## - echo ""
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## - echo "[ Error ]: A previos instance of that script \"`basename $0`\" seems already be running."
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## - echo ""
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## - echo -e "\tExiting now.."
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## - echo ""
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## -
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## - for _to_address in $to_addresses ; do
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## - echo -e "To:${_to_address}\n${content_type}\nSubject:Error cronjob `basename $0` -- $datum\n${msg}\n" \
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## - | sendmail -F "Error `hostname -f`" -f $from_address $_to_address
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## - done
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## -
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## - exit 1
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## -
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## - fi
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## - Remove lockdir when the script finishes, or when it receives a signal
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trap 'rm -rf "$LOCK_DIR"' 0 2 15
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# -------------
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# --- Read Configurations from $conf_file
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@@ -179,7 +144,7 @@ trap 'rm -rf "$LOCK_DIR"' 0 2 15
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# Some default values
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#
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DEFAULT_CONFLICTING_SCRIPTS="/root/bin/monitoring/check_local_webservice.sh:/tmp/check_local_webservice.LOCK"
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DEFAULT_CONFLICTING_SCRIPTS="/root/bin/monitoring/check_local_webservice.sh"
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if [[ ! -f "$conf_file" ]]; then
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echo ""
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@@ -199,6 +164,18 @@ fi
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# -
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if [[ ${#CONFLICTING_SCRIPTS} -gt 0 ]] ; then
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# - Try using a random start delay to prevent (or at least have a small chance) that
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# - conflicting scripts will both/all abort if they start at the same time.
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# -
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# - !! Notice !!
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# - This only makes sense if a fixed LOCK directory is used, otherwise the process list
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# - (and NOT the LOCK-directory) is used to look for scripts running in parallel.
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# -
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if [[ "$LOCK_DIR" = "/tmp/${script_name%%.*}.LOCK" ]]; then
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_shift="$(( $RANDOM % 10 + 1 ))"
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sleep $(( $RANDOM % 25 + $_shift ))
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fi
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_stop_running=false
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for _val in $CONFLICTING_SCRIPTS ; do
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@@ -206,15 +183,21 @@ if [[ ${#CONFLICTING_SCRIPTS} -gt 0 ]] ; then
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_script_name="$(basename ${_val_arr[0]})"
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if [[ -n "${_val_arr[1]}" ]] && [[ -d "${_val_arr[1]}" ]] ; then
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_stop_running=true
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else
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if [[ -n "${_val_arr[1]}" ]] ; then
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if [[ "${_val_arr[1]}" = "CHECK_PROCESS_LIST" ]] ; then
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check_string_ps="${_val_arr[0]}"
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if ps -e f | grep -E "\s+${check_string_ps}" | grep -v grep | grep -v -E "\s+vim\s+" > /dev/null ; then
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_stop_running=true
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fi
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elif [[ -d "${_val_arr[1]}" ]] ; then
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_stop_running=true
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fi
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elif [[ -d "/tmp/${_script_name%%.*}.LOCK" ]]; then
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_stop_running=true
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fi
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if $_stop_running ; then
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@@ -227,12 +210,51 @@ if [[ ${#CONFLICTING_SCRIPTS} -gt 0 ]] ; then
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clean_up 1
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fi
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fi # if $_stop_running ; then
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done # for _val in $CONFLICTING_SCRIPTS ; do
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fi # if [[ ${#CONFLICTING_SCRIPTS} -gt 0 ]] ; then
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#---------------------------------------
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#-----------------------------
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# Job is already running?
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#-----------------------------
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#---------------------------------------
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## - If job already runs, stop execution..
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## -
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if mkdir "$LOCK_DIR" 2> /dev/null ; then
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## - Remove lockdir when the script finishes, or when it receives a signal
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trap "clean_up 1" SIGHUP SIGINT SIGTERM
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else
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datum=`date +"%d.%m.%Y"`
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msg="[ Error ]: A previos instance of \"`basename $0`\" seems already be running.\n\tExiting now.."
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echo ""
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echo "[ Error ]: A previos instance of that script \"`basename $0`\" seems already be running."
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echo ""
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echo -e "\tExiting now.."
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echo ""
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for _to_address in $to_addresses ; do
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echo -e "To:${_to_address}\n${content_type}\nSubject:Error cronjob `basename $0` -- $datum\n${msg}\n" \
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| sendmail -F "Error `hostname -f`" -f $from_address $_to_address
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done
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exit 1
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fi
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## - Remove lockdir when the script finishes, or when it receives a signal
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## -
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#trap 'rm -rf "$LOCK_DIR"' 0 2 15
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#---------------------------------------
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#-----------------------------
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@@ -22,10 +22,18 @@
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# - In addition to the script, a LOCK directory can also be specified which is
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# - connected to it.
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# -
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# - If no fixed LOCK directory is connected to the script, set
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# - this value to the constant 'CHECK_PROCESS_LIST'.
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# -
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# - If no value for the LOCK directory is given, the LOCK directory
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# - '/tmp/<base-script_name>.LOCK' is assumed.
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# -
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# -
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# - Example:
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# - CONFLICTING_SCRIPTS="
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# - /root/bin/monitoring/check_webservice_load.sh
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# - /root/bin/monitoring/check_remote_websites.sh:/tmp/check_remote_websites.LOCK
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# - /root/bin/monitoring/check_webservice_load.sh:CHECK_PROCESS_LIST
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# - /root/bin/monitoring/check_remote_websites.sh
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# - "
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# -
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# - Defaults to:
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# - CONFLICTING_SCRIPTS="/root/bin/monitoring/check_local_webservice.sh:/tmp/check_local_webservice.LOCK"
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