Friday, May 4, 2012

Monitoring tool - init script for icinga, ido2db(idoutils), and npcd(pnp4nagios)

As installing finishes icinga, icinga-web, and pnp4nagios, it's necessary to setup init scripts to run and stop daemon. Of course, each of the source files includes ones, but I prefer a typical format based on RPM package to the ones in the source file. So I modified the init scripts based on RPM packages.

I am going to introduce of  each of the init scripts and verification about how they work.
They are open to the public in my github.
  • daemon and init script
Icinga (based on Nagios RPM package) /etc/init.d/icinga
IDOUtils ( based on NDOUtils RPM package) /etc/init.d/ido2mod
PNP4nagios ( based on Nagios RPM Package a little) /etc/init.d/npcd

icinga

  • create init script based on nagios RPM package
    The patch file is stored here.
# yumdownloader --enablerepo=rpmforge icinga
# mkdir work
# cd work
# rpm2cpio ../ nagios-3.2.3-3.el5.rf.x86_64.rpm | cpid -id ./etc/rc.d/init.d/nagios
# cp etc/rc.d/init.d/nagios ./icinga
# cp icinga{,_diff}
...
# diff -c icinga icinga_diff > icinga.patch
# patch -p0 < icinga.patch
# cp icinga /etc/init.d/icinga
  • start daemon
# /etc/init.d/icinga start
Starting icinga:                                           [  OK  ]
  • stop daemon
# /etc/init.d/icinga stop
Stopping icinga:                                           [  OK  ]
  • restart daemon
# /etc/init.d/icinga restart
Stopping icinga:                                           [  OK  ]
Starting icinga:                                           [  OK  ]
  • condrestart daemon
# /etc/init.d/icinga condrestart
Stopping icinga:                                           [  OK  ]
Starting icinga:                                           [  OK  ]
  • reload daemon
# /etc/init.d/icinga reload
icinga (pid  17359) is running...
Reloading icinga:                                          [  OK  ]
  • check if daemon is running
# /etc/init.d/icinga status
icinga (pid  17359) is running...
  • difference between nagios(rpmpackage) and icinga
# diff -u nagios icinga_diff
--- nagios     2012-05-01 23:34:15.000000000 +0900
+++ icinga_diff        2012-05-03 20:52:17.000000000 +0900
@@ -1,36 +1,38 @@
 #!/bin/sh
 # $Id$
-# Nagios      Startup script for the Nagios monitoring daemon
+# Icinga      Startup script for the Nagios monitoring daemon
 #
 # chkconfig:  - 85 15
-# description:        Nagios is a service monitoring system
-# processname: nagios
-# config: /etc/nagios/nagios.cfg
-# pidfile: /var/nagios/nagios.pid
+# description:        Icinga is a service monitoring system
+# processname: icinga
+# config: /usr/local/icinga/etc/icinga.cfg
+# pidfile: /var/run/icinga.pid
 #
 ### BEGIN INIT INFO
-# Provides:           nagios
+# Provides:           icinga
 # Required-Start:     $local_fs $syslog $network
 # Required-Stop:      $local_fs $syslog $network
-# Short-Description:    start and stop Nagios monitoring server
-# Description:                Nagios is is a service monitoring system
+# Short-Description:    start and stop Icinga monitoring server
+# Description:                Icinga is is a service monitoring system
 ### END INIT INFO

 # Source function library.
 . /etc/rc.d/init.d/functions

-prefix="/usr"
-exec_prefix="/usr"
-exec="/usr/bin/nagios"
-prog="nagios"
-config="/etc/nagios/nagios.cfg"
-pidfile="/var/nagios/nagios.pid"
-user="nagios"
+user="icinga"
+prog="icinga"
+prefix="/usr/local/$prog"
+exec_prefix="${prefix}"
+exec="${prefix}/bin/$prog"
+config="${prefix}/etc/$prog.cfg"
+piddir="/var/run"
+lockdir="/var/lock/subsys"
+pidfile="$piddir/$prog.pid"
+lockfile="${lockdir}/$prog"

+[ -d "$piddir" ] || mkdir -p piddir && chown $prog:$prog $piddir
 [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

-lockfile=/var/lock/subsys/$prog
-
 start() {
     [ -x $exec ] || exit 5
     [ -f $config ] || exit 6
@@ -47,7 +49,7 @@
     killproc -d 10 $exec
     retval=$?
     echo
-    [ $retval -eq 0 ] && rm -f $lockfile
+    [ $retval -eq 0 ] && rm -f $lockfile $pidfile
     return $retval
 }

@@ -60,7 +62,7 @@
 reload() {
     echo -n $"Reloading $prog: "
     killproc $exec -HUP
-    RETVAL=$?
+    retval=$?
     echo
 }

@@ -70,8 +72,8 @@

 check_config() {
         $nice runuser -s /bin/bash - $user -c "$corelimit >/dev/null 2>&1 ; $exec -v $config > /dev/null 2>&1"
-        RETVAL=$?
-        if [ $RETVAL -ne 0 ] ; then
+        retval=$?
+        if [ $retval -ne 0 ] ; then
                 echo -n $"Configuration validation failed"
                 failure
                 echo
  • about the pidfile and the lockfile path
    Icinga.cfg(also nagios.cfg) defines lockfile as pidfile.
    I'm not sure why they're defined as so, but I think they should be separated.
    I defined he path of pidfile and lockfile in the init script and icinga.cfg
# grep '^lock_file'icinga.cfg
lock_file=/var/run/icinga.pid
# egrep '^(pid|lock)' /etc/init.d/icinga 
piddir="/var/run"
lockdir="/var/lock/subsys"
pidfile="$piddir/$prog.pid"
lockfile="${lockdir}/$prog"

ido2db

  • create init script for ndoutils based on ndo2utils RPM packageThe patch file is stored here.
# yumdownloader --enablerepo=rpmforge ndo2utils
# mkdir work
# cd work
# rpm2cpio ../ndoutils-1.4-0.beta7.3.el5.rf.x86_64.rpm | cpio -id ./etc/init.d/ndoutils
# cp etc/init.d/ndoutils ./ido2db
# cp ido2db{,_diff}
# vi ido2db_diff
...
# diff -c ido2db ido2db_diff > ido2db.patch
# patch -p0 < ido2db.patch
# cp ido2db /etc/init.d/ido2db
  • start daemon
# /etc/init.d/ido2db start
Starting ido2db:                                           [  OK  ]
  • stop daemon
# /etc/init.d/ido2db stop
Stopping ido2db:                                           [  OK  ]
  • restart daemon
# /etc/init.d/ido2db restart
Stopping ido2db:                                           [  OK  ]
Starting ido2db:                                           [  OK  ]
  • condrestart daemon
# /etc/init.d/ido2db condrestart
Stopping ido2db:                                           [  OK  ]
Starting ido2db:                                           [  OK  ]
  • difference between ndo2utils(rpmpackage) and ido2db
# diff ndoutils ndoutils_diff

@@ -1,37 +1,42 @@
 #!/bin/sh
-# Startup script for ndo-daemon
+# Startup script for ido2db-daemon
 #
 # chkconfig: 2345 95 05
-# description: Nagios Database Objects daemon
+# description: Icinga Database Objects daemon

 # Source function library.
 . /etc/rc.d/init.d/functions

-
-BINARY=ndo2db-3x
-DAEMON=/usr/sbin/$BINARY
-CONFIG=/etc/nagios/ndo2db.cfg
-
-[ -f $DAEMON ] || exit 0
-
-prog="ndo2db"
+prog=ido2db
+user=icinga
+prefix=/usr/local/icinga
+exec=$prefix/bin/$prog
+config=$prefix/etc/ido2db.cfg
+piddir="/var/run"
+lockdir="/var/lock/subsys"
+pidfile="$piddir/$prog.pid"
+lockfile="${lockdir}/$prog"

 start() {
+    [ -x $exec ] || exit 5
+    [ -f $config ] || exit 6
     echo -n $"Starting $prog: "
-    daemon --user nagios $DAEMON -c $CONFIG
-    RETVAL=$?
+    daemon --user $user $exec -c $config
+    retval=$?
+    [ $retval -eq 0 ] && touch $lockfile
     echo
-    return $RETVAL
+    return $retval
 }

 stop() {
-    if test "x`pidof $BINARY`" != x; then
+    if test "x`pidof $prog`" != x; then
         echo -n $"Stopping $prog: "
-        killproc ndo2db-3x
+        killproc $prog
         echo
     fi
-    RETVAL=$?
-    return $RETVAL
+    retval=$?
+    [ $retval -eq 0 ] && rm -f $lockfile $pidfile
+    return $retval
 }

 case "$1" in
@@ -44,14 +49,14 @@
             ;;

         status)
-            status $BINARY
+            status $prog
             ;;
         restart)
             stop
             start
             ;;
         condrestart)
-            if test "x`pidof $BINARY`" != x; then
+            if test "x`pidof $prog`" != x; then
                 stop
                 start
             fi
@@ -63,5 +68,5 @@

 esac

-exit $RETVAL
+exit $retval
  • about the pidfile and the lockfile path
    Icinga.cfg(also nagios.cfg) defines lockfile as pidfile.
    I'm not sure why they're defined as so, but I think they should be separated.
    I defined he path of pidfile and lockfile in the init script and icinga.cfg
# grep '^lock_file'ido2db.cfg
lock_file=/var/run/ido2db.pid
# egrep '^(pid|lock)' /etc/init.d/icinga 
piddir="/var/run"
lockdir="/var/lock/subsys"
pidfile="$piddir/$prog.pid"
lockfile="${lockdir}/$prog"


npcd

  • create init script for npcd based on nagios RPM packageThe patch file is stored here.
# yumdownloader --enablerepo=rpmforge icinga
# mkdir work
# cd work
# rpm2cpio ../ nagios-3.2.3-3.el5.rf.x86_64.rpm | cpid -id ./etc/rc.d/init.d/nagios
# cp etc/rc.d/init.d/nagios ./npcd
# cp npcd{,_diff}
...
# diff -c npcd npcd_diff > npcd.patch
# patch -p0 < npcd.patch
# cp npcd /etc/init.d/npcd
  • start daemon
# /etc/init.d/npcd start
npcd is stopped
Starting npcd:                                             [  OK  ]
  • stop daemon
# /etc/init.d/npcd stop
npcd (pid  14128) is running...
Stopping npcd:                                             [  OK  ]
  • restart daemon
# /etc/init.d/npcd restart
Starting npcd:                                             [  OK  ]
Starting npcd:                                             [  OK  ]
  • condrestart daemon
# /etc/init.d/npcd condrestart
npcd (pid  14216) is running...
Stopping npcd:                                             [  OK  ]
Starting npcd:                                             [  OK  ]
  • reload daemon
# /etc/init.d/npcd reload
npcd (pid  14233) is running...
Reloading npcd:                                            [  OK  ]
  • check if daemon is running
# /etc/init.d/npcd status
 npcd (pid 14233) is running...
  • difference between nagios(rpmpackage) and npcd
# diff -u npcd npcd_diff
--- npcd       2012-05-04 10:47:11.000000000 +0900
+++ npcd_diff  2012-05-03 22:45:28.000000000 +0900
@@ -1,41 +1,40 @@
 #!/bin/sh
-# $Id$
-# Nagios      Startup script for the Nagios monitoring daemon
-#
-# chkconfig:  - 85 15
-# description:        Nagios is a service monitoring system
-# processname: nagios
-# config: /etc/nagios/nagios.cfg
-# pidfile: /var/nagios/nagios.pid
 #
 ### BEGIN INIT INFO
-# Provides:           nagios
-# Required-Start:     $local_fs $syslog $network
-# Required-Stop:      $local_fs $syslog $network
-# Short-Description:    start and stop Nagios monitoring server
-# Description:                Nagios is is a service monitoring system
+# Short-Description: pnp4nagios NPCD Daemon Version 0.6.16
+# Description: Nagios Performance Data C Daemon
+# chkconfig: 345 99 01
+# processname: npcd
+# config: /usr/local/pnp4nagios/etc/npcd.cfg
+# pidfile: /var/run/npcd.pid
+# Provides:          npcd
+# Required-Start:
+# Required-Stop:
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
 ### END INIT INFO

 # Source function library.
 . /etc/rc.d/init.d/functions

-prefix="/usr"
-exec_prefix="/usr"
-exec="/usr/bin/nagios"
-prog="nagios"
-config="/etc/nagios/nagios.cfg"
-pidfile="/var/nagios/nagios.pid"
-user="nagios"
+user="icinga"
+prog="npcd"
+prefix="/usr/local/pnp4nagios"
+exec_prefix="${prefix}"
+exec="${prefix}/bin/$prog"
+config="${prefix}/etc/$prog.cfg"
+piddir="/var/run"
+lockdir="/var/lock/subsys"
+pidfile="/var/run/$prog.pid"
+lockfile="${lockdir}/$prog"

 [ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

-lockfile=/var/lock/subsys/$prog
-
 start() {
     [ -x $exec ] || exit 5
     [ -f $config ] || exit 6
     echo -n $"Starting $prog: "
-    daemon --user=$user $exec -d $config
+    daemon --user=$user $exec -d -f $config
     retval=$?
     echo
     [ $retval -eq 0 ] && touch $lockfile
@@ -47,7 +46,7 @@
     killproc -d 10 $exec
     retval=$?
     echo
-    [ $retval -eq 0 ] && rm -f $lockfile
+    [ $retval -eq 0 ] && rm -f $lockfile $pidfile
     return $retval
 }

@@ -60,31 +59,14 @@
 reload() {
     echo -n $"Reloading $prog: "
     killproc $exec -HUP
-    RETVAL=$?
+    retval=$?
     echo
 }

-force_reload() {
-    restart
-}
-
-check_config() {
-        $nice runuser -s /bin/bash - $user -c "$corelimit >/dev/null 2>&1 ; $exec -v $config > /dev/null 2>&1"
-        RETVAL=$?
-        if [ $RETVAL -ne 0 ] ; then
-                echo -n $"Configuration validation failed"
-                failure
-                echo
-                exit 1
-
-        fi
-}
-

 case "$1" in
     start)
         status $prog && exit 0
-      check_config
         $1
         ;;
     stop)
@@ -92,33 +74,21 @@
         $1
         ;;
     restart)
-      check_config
         $1
         ;;
     reload)
         status $prog || exit 7
-      check_config
         $1
         ;;
-    force-reload)
-      check_config
-        force_reload
-        ;;
     status)
         status $prog
         ;;
-    condrestart|try-restart)
+    condrestart)
         status $prog|| exit 0
-      check_config
         restart
         ;;
-    configtest)
-        echo -n  $"Checking config for $prog: "
-        check_config && success
-        echo
-      ;;
     *)
-        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
+        echo $"Usage: $0 {start|stop|status|restart|condrestart|reload}"
         exit 2
 esac
 exit $?


I will list the other configurations for icinga, idoutils, and pnp4nagios next time.

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