Merge branch 'master' of git.oopen.de:script/monitoring

.gitignore

@@ -1,3 +1,3 @@
-*.swl
+*.swp
 /conf/*.conf
 /BAK/*

remove_zombies_user.sh

@@ -0,0 +1,265 @@
+#!/usr/bin/env bash
+
+working_dir="$(dirname $(realpath $0))"
+
+# -------------
+# - Some Variables
+# -------------
+
+LOCK_DIR="/tmp/$(basename $0).LOCK"
+
+KILL_SIGNAL=HUP
+
+#CHECK_USER="$*"
+
+
+# -------------
+# - Some functions
+# -------------
+
+usage() {
+
+   
+   [[ -n  "$1" ]] && error "$1"
+
+   
+   [[ $terminal ]] && echo -e "
+\033[1mUsage:\033[m
+
+   $(basename $0) -u <user>
+
+\033[1mDescription\033[m
+
+   Searches for zombie (defunct) child prozesses owned by a given user. If such
+   processes exists, the script tries to kill them by sending a HUP signal to
+   the parent process.
+
+   A user must be given using option '-u'.
+
+\033[1mOptions\033[m
+
+   -h
+      Prints this help.
+
+   -u <user>
+      Searches for zombie (defunct) prozesses owned by this user.
+
+\033[1mExample:\033[m
+	
+   Search for (and delete) defunct child prozesses owned by user 'sympa''
+
+      $(basename $0) -u sympa
+
+"
+
+   clean_up 1
+
+}
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm -rf "$LOCK_DIR"
+   exit $1
+}
+
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+fatal(){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mFatal\033[m ]: $*"
+      echo ""
+      echo -e "   \033[31m\033[1mScript was interupted\033[m!"
+   else
+      echo "[ Fatal ]: $*"
+      echo ""
+      echo "              Script was terminated...."
+   fi
+   echo ""
+   clean_up 1
+}
+
+error (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[31m\033[1mError\033[m ]: $*"
+   else
+      echo "[ Error ]: $*"
+   fi
+   echo ""
+}
+
+warn (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[33m\033[1mWarning\033[m ]: $*"
+   else
+      echo "[ Warning ]: $*"
+   fi
+   echo ""
+}
+
+info (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[32m\033[1mInfo\033[m ]: $*"
+   else
+      echo "[ Info ]: $*"
+   fi
+   echo ""
+}
+info_terminal (){
+   if $terminal ; then
+      echo ""
+      echo -e "   [ \033[32m\033[1mInfo\033[m ]: $*"
+      echo ""
+   fi
+}
+
+ok (){
+   echo ""
+   if $terminal ; then
+      echo -e "   [ \033[32m\033[1mOk\033[m ]: $*"
+   else
+      echo "[ Ok ]: $*"
+   fi
+   echo ""
+}
+
+
+# -------------
+# - Check some prerequisites
+# -------------
+
+# - Is this script running on terminal ?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+else
+   terminal=false
+fi
+
+if [[ -z "$(which basename)" ]]; then
+   fatal 'It seems "basename" is not installed, but needed!'
+fi
+
+if [[ -z "$(which realpath)" ]]; then
+   fatal 'It seems "realpath" is not installed, but needed!'
+fi
+
+
+
+# -------------
+# - Jobhandling 
+# -------------
+
+# - If job already runs, stop execution..
+# -
+if mkdir "$LOCK_DIR" 2> /dev/null ; then
+
+   ## - Remove lockdir when the script finishes, or when it receives a signal
+   trap clean_up SIGHUP SIGINT SIGTERM
+
+else
+
+   datum="$(date +"%d.%m.%Y %H:%M")"
+
+	fatal "A previos instance of that script \"$(basename $0)\" seems already be running."
+
+   exit 1
+
+fi
+
+
+# -------------
+# - Read Commanline Arguments
+# -------------
+
+while getopts hu: opt ; do
+	case $opt in
+	 	h) usage ;;
+	 	u) CHECK_USER=$OPTARG ;;
+   	*) usage
+	esac
+done
+
+if [[ -z "$CHECK_USER" ]]; then
+	usage "No user (option -u) given"
+fi
+
+shift $(expr $OPTIND - 1)
+[[ "$#" -gt 0 ]] && usage "Wrong number of arguments given!"
+
+
+# -------------
+#  Checking ..
+# -------------
+
+if $terminal ; then
+   echo ""
+   echo -e "   \033[1mCheck for zombie (defunct) child prozesses owned by a given user\033[m"
+   echo "   ================================================================"
+fi
+
+
+if $(ps -Ao"stat,user,command" | grep "${CHECK_USER}" | grep -v grep | grep -e '^[zZ]' > /dev/null 2>&1)
+then
+
+   warn "Found Zombie Processes '${CHECK_USER}' on '$(hostname -f)':"
+
+   # - Print out the concerning lines frp 'ps' output.
+   # -
+   ps -Ao"stat,user,pid,ppid,command" | grep "$(basename ${CHECK_USER})" | grep -v grep | grep -e '^[zZ]'
+
+   membefore=$(cat /proc/meminfo | grep Committed_AS | awk '{print $2}')
+
+   info "Trying a graceful kill to the concerning parents with signal '$KILL_SIGNAL' .."
+
+	# - Process ID(s) of the zombie process(es)
+	# -
+	ZOMBIE_PIDS="$(ps -Ao"stat,user,pid,ppid,command" | grep "${CHECK_USER}" | grep -v grep | grep -e '^[zZ]' \
+      | awk '{ print $3 }' | sort -u)"
+
+	# - Sending the kill signal ($KILL_SIGNAL) to the parent process ID(s)
+	# -
+   ps -Ao"stat,user,pid,ppid,command" | grep "${CHECK_USER}" | grep -v grep | grep -e '^[zZ]' \
+		| awk '{ print $4 }' | sort -u | xargs --no-run-if-empty kill -$KILL_SIGNAL
+
+   if [[ "$?" -eq 0 ]];then
+
+		declare -i count=1
+		for _PID in $ZOMBIE_PIDS ; do
+			if [[ $count -eq 1 ]]; then
+				KILLED_PIDS="$_PID"
+			else
+				KILLED_PIDS="$KILLED_PIDS $_PID"
+			fi
+			((count++))
+		done
+
+      sleep 10
+
+      ok "Cleaning up zombie processes owned by user '${CHECK_USER}' seems succsessfully finisched"
+
+		ok "$count zombie process(es) with PID(s) '${KILLED_PIDS}' removed from process list"
+
+      memafter=`cat /proc/meminfo | grep Committed_AS | awk '{print $2}'`
+
+      info "`expr $membefore - $memafter` KB RAM has been freed"
+   else
+      error "Cleaning up zombie processes owned by user '${CHECK_USER}' failed!"
+   fi
+else
+   info_terminal "No zombie prossses owned by user '${CHECK_USER}' found."
+fi
+
+if $terminal ; then
+   echo ""
+fi
+clean_up 0