[Check_mk (english)] Spool functionality for freebsd agent

Paul Bongers Paul.Bongers at osudio.com
Fri Jul 8 10:03:38 CEST 2016


Hi list,


I've created a patch for the FreeBSD agent that adds support for spool
files.

Attached to this email you'll find both the patch and the patched agent
script.


I'm on 1.2.6p16.cre.


Sending this mail also to the Check_MK feedback address.


-- 
Mail adressen content architects

Met vriendelijke groet / Best regards,

 

Paul Bongers

Application Engineer

 

E-mail:   paul.bongers at osudio.com <mailto:paul.bongers at osudio.com>

Web:      http://www.osudio.com <http://www.osudio.com/>

 

 

 

 

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#!/usr/local/bin/bash
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk at mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# ails.  You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

# Author: Lars Michelsen <lm at mathias-kettner.de>
#         Florian Heigl <florian.heigl at gmail.com>
#           (Added sections: df mount mem netctr ipmitool)

# NOTE: This agent has beed adapted from the Check_MK linux agent.
#       The most sections are commented out at the moment because
#       they have not been ported yet. We will try to adapt most
#       sections to print out the same output as the linux agent so
#       that the current checks can be used.

# This might be a good source as description of sysctl output:
# http://people.freebsd.org/~hmp/utilities/satbl/_sysctl.html

# Remove locale settings to eliminate localized outputs where possible
export LC_ALL=C
unset LANG

export MK_LIBDIR="/usr/lib/check_mk_agent"
export MK_CONFDIR="/etc/check_mk"
export MK_TMPDIR="/var/run/check_mk"


# Make sure, locally installed binaries are found
PATH=$PATH:/usr/local/bin:/usr/local/sbin

# All executables in PLUGINSDIR will simply be executed and their
# ouput appended to the output of the agent. Plugins define their own
# sections and must output headers with '<<<' and '>>>'
PLUGINSDIR=$MK_LIBDIR/plugins

# All executables in LOCALDIR will by executabled and their
# output inserted into the section <<<local>>>. Please refer
# to online documentation for details.
LOCALDIR=$MK_LIBDIR/local


# close standard input (for security reasons) and stderr
if [ "$1" = -d ]
then
    set -xv
else
    exec </dev/null 2>/dev/null
fi

# Runs a command asynchronous by use of a cache file
function run_cached() {
    if [ "$1" = -s ] ; then local section="echo '<<<$2>>>' ; " ; shift ; fi
    local NAME=$1
    local MAXAGE=$2
    shift 2
    local CMDLINE="$section$@"

    if [ ! -d $MK_TMPDIR/cache ]; then mkdir -p $MK_TMPDIR/cache ; fi
    CACHEFILE="$MK_TMPDIR/cache/$NAME.cache"

    # Check if the creation of the cache takes suspiciously long and return
    # nothing if the age (access time) of $CACHEFILE.new is twice the MAXAGE
    local NOW=$(date +%s)
    if [ -e "$CACHEFILE.new" ] ; then
        local CF_ATIME=$(stat -f "%a" "$CACHEFILE.new")
        if [ $((NOW - CF_ATIME)) -ge $((MAXAGE * 2)) ] ; then
            return
        fi
    fi

    # Check if cache file exists and is recent enough
    if [ -s "$CACHEFILE" ] ; then
        local MTIME=$(stat -f "%m" "$CACHEFILE")
        if [ $((NOW - MTIME)) -le $MAXAGE ] ; then local USE_CACHEFILE=1 ; fi
        # Output the file in any case, even if it is
        # outdated. The new file will not yet be available
        cat "$CACHEFILE"
    fi

    # Cache file outdated and new job not yet running? Start it
    if [ -z "$USE_CACHEFILE" -a ! -e "$CACHEFILE.new" ] ; then
        echo "$CMDLINE" | daemon bash -o noclobber > $CACHEFILE.new && mv $CACHEFILE.new $CACHEFILE || rm -f $CACHEFILE $CACHEFILE.new &
    fi
}

echo '<<<check_mk>>>'
echo Version: 1.2.6p16
echo AgentOS: freebsd



osver="$(uname -r)"
is_jailed="$(sysctl -n security.jail.jailed)"


# Partitionen (-P verhindert Zeilenumbruch bei langen Mountpunkten)
# Achtung: NFS-Mounts werden grundsaetzlich ausgeblendet, um
# Haenger zu vermeiden. Diese sollten ohnehin besser auf dem
# Server, als auf dem Client ueberwacht werden.

echo '<<<df>>>'
# no special zfs handling so far, the ZFS.pools plugin has been tested to
# work on FreeBSD
if df -T > /dev/null ; then
    df -kTP -t ufs | egrep -v '(Filesystem|devfs|procfs|fdescfs|basejail)'
else
    df -kP -t ufs | egrep -v '(Filesystem|devfs|procfs|fdescfs|basejail)' | awk '{ print $1,"ufs",$2,$3,$4,$5,$6 }'
fi

# Filesystem usage for ZFS
if type zfs > /dev/null 2>&1 ; then
    echo '<<<zfsget>>>'
    zfs get -Hp name,quota,used,avail,mountpoint,type -t filesystem,volume || \
       zfs get -Hp name,quota,used,avail,mountpoint,type
    echo '[df]'
    df -kP -t zfs | sed 1d
fi

# Check NFS mounts by accessing them with stat -f (System
# call statfs()). If this lasts more then 2 seconds we
# consider it as hanging. We need waitmax.
#if type waitmax >/dev/null
#then
#    STAT_VERSION=$(stat --version | head -1 | cut -d" " -f4)
#    STAT_BROKE="5.3.0"
#
#    echo '<<<nfsmounts>>>'
#    sed -n '/ nfs /s/[^ ]* \([^ ]*\) .*/\1/p' < /proc/mounts |
#        while read MP
#  do
#   if [ $STAT_VERSION != $STAT_BROKE ]; then
#      waitmax -s 9 2 stat -f -c "$MP ok %b %f %a %s" "$MP" || \
#    echo "$MP hanging 0 0 0 0"
#   else
#      waitmax -s 9 2 stat -f -c "$MP ok %b %f %a %s" "$MP" && \
#      printf '\n'|| echo "$MP hanging 0 0 0 0"
#   fi
#  done
#fi

# Check mount options.
# FreeBSD doesn't do remount-ro on errors, but the users might consider
# security related mount options more important.
echo '<<<mounts>>>'
mount -p -t ufs

# processes including username, without kernel processes
echo '<<<ps>>>'
COLUMNS=10000
if [ "$is_jailed" = "0" ]; then
    ps ax -o state,user,vsz,rss,pcpu,command | sed -e 1d  -e '/\([^ ]*J\) */d' -e 's/ *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) */(\2,\3,\4,\5) /'
else
    ps ax -o user,vsz,rss,pcpu,command | sed -e 1d -e 's/ *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) */(\1,\2,\3,\4) /'
fi


# Produce compatible load/cpu output to linux agent. Not so easy here.
echo '<<<cpu>>>'
echo `sysctl -n vm.loadavg | tr -d '{}'` `top -b -n 1 | grep -E '^[0-9]+ processes' | awk '{print $3"/"$1}'` `sysctl -n kern.lastpid` `sysctl -n hw.ncpu`

# Calculate the uptime in seconds since epoch compatible to /proc/uptime in linux
echo '<<<uptime>>>'
up_seconds=$(( `date +%s` - `sysctl -n kern.boottime  | cut -f1 -d\, | awk '{print $4}'`))
idle_seconds=$(ps axw | grep idle | grep -v grep | awk '{print $4}' | cut -f1 -d\: )
echo "$up_seconds $idle_seconds"

# Platten- und RAID-Status von LSI-Controlleren, falls vorhanden
#if which cfggen > /dev/null ; then
#   echo '<<<lsi>>>'
#   cfggen 0 DISPLAY | egrep '(Target ID|State|Volume ID|Status of volume)[[:space:]]*:' | sed -e 's/ *//g' -e 's/:/ /'
#fi


# Multipathing is supported in FreeBSD by now
# http://www.mywushublog.com/2010/06/freebsd-and-multipath/
if kldstat -v | grep g_multipath > /dev/null ; then
    echo '<<<freebsd_multipath>>>'
    gmultipath status | grep -v ^Name
fi


# Soft-RAID
echo '<<<freebsd_geom_mirrors>>>'
gmirror status | grep -v ^Name

# Performancecounter Kernel
echo "<<<kernel>>>"
date +%s
forks=`sysctl -n vm.stats.vm.v_forks`
vforks=`sysctl -n vm.stats.vm.v_vforks`
rforks=`sysctl -n vm.stats.vm.v_rforks`
kthreads=`sysctl -n vm.stats.vm.v_kthreads`
echo "cpu" `sysctl -n kern.cp_time | awk ' { print $1" "$2" "$3" "$5" "$4 } '`
echo "ctxt" `sysctl -n vm.stats.sys.v_swtch`
echo "processes" `expr $forks + $vforks + $rforks + $kthreads`

# Network device statistics (Packets, Collisions, etc)
# only the "Link/Num" interface has all counters.
echo '<<<netctr>>>'
date +%s
if [ "$(echo $osver | cut -f1 -d\. )" -gt "8" ]; then
    netstat -inb | egrep -v '(^Name|lo|plip)' | grep Link | awk '{print $1" "$8" "$5" "$6" "$7" 0 0 0 0 "$11" "$9" "$10" 0 0 0 0 0"}'
else
    # pad output for freebsd 7 and before
    netstat -inb | egrep -v '(^Name|lo|plip)' | grep Link | awk '{print $1" "$7" "$5" "$6" 0 0 0 0 0 "$10" "$8" "$9" 0 0 "$11" 0 0"}'
fi


# IPMI-Data (Fans, CPU, temperature, etc)
# needs the sysutils/ipmitool and kldload ipmi.ko
if which ipmitool >/dev/null ; then
    echo '<<<ipmi>>>'
    ipmitool sensor list \
        | grep -v 'command failed' \
        | sed -e 's/ *| */|/g' -e "s/ /_/g" -e 's/_*$//' -e 's/|/ /g' \
        | egrep -v '^[^ ]+ na ' \
        | grep -v ' discrete '
fi


# State of LSI MegaRAID controller via MegaCli.
# To install: pkg install megacli
if which MegaCli >/dev/null ; then
    echo '<<<megaraid_pdisks>>>'
    MegaCli -PDList -aALL -NoLog < /dev/null | egrep 'Enclosure|Raw Size|Slot Number|Device Id|Firmware state|Inquiry'
    echo '<<<megaraid_ldisks>>>'
    MegaCli -LDInfo -Lall -aALL -NoLog < /dev/null | egrep 'Size|State|Number|Adapter|Virtual'
    echo '<<<megaraid_bbu>>>'
    MegaCli -AdpBbuCmd -GetBbuStatus -aALL -NoLog < /dev/null | grep -v Exit
fi


# OpenVPN Clients.
# Correct log location unknown, sed call might also be broken
if [ -e /var/log/openvpn/openvpn-status.log ] ; then
    echo '<<<openvpn_clients:sep(44)>>>'
    sed -n -e '/CLIENT LIST/,/ROUTING TABLE/p' < /var/log/openvpn/openvpn-status.log  | sed -e 1,3d -e '$d'
fi


if which ntpq > /dev/null 2>&1 ; then
   echo '<<<ntp>>>'
   # remote heading, make first column space separated
   ntpq -np | sed -e 1,2d -e 's/^\(.\)/\1 /' -e 's/^ /%/'
fi


# Checks for cups monitoring
#if which lpstat > /dev/null 2>&1; then
#  echo '<<<cups_queues>>>'
#  lpstat -p
#  echo '---'
#  for i in $(lpstat -p | grep -E "^(printer|Drucker)" | awk '{print $2}' | grep -v "@"); do
#    lpstat -o "$i"
#  done
#fi

# Heartbeat monitoring
#if which cl_status > /dev/null 2>&1; then
#  # Different handling for heartbeat clusters with and without CRM
#  # for the resource state
#  if [ -S /var/run/heartbeat/crm/cib_ro ]; then
#    echo '<<<heartbeat_crm>>>'
#    crm_mon -1 -r | grep -v ^$ | sed 's/^\s/_/g'
#  else
#    echo '<<<heartbeat_rscstatus>>>'
#    cl_status rscstatus
#  fi
#
#  echo '<<<heartbeat_nodes>>>'
#  for NODE in $(cl_status listnodes); do
#    if [ $NODE != $HOSTNAME ]; then
#      STATUS=$(cl_status nodestatus $NODE)
#      echo -n "$NODE $STATUS"
#      for LINK in $(cl_status listhblinks $NODE 2>/dev/null); do
#        echo -n " $LINK $(cl_status hblinkstatus $NODE $LINK)"
#      done
#      echo
#    fi
#  done
#fi

# Number of TCP connections in the various states
echo '<<<tcp_conn_stats>>>'
netstat -na | awk ' /^tcp/ { c[$6]++; } END { for (x in c) { print x, c[x]; } }'


# Postfix mailqueue monitoring
#
# Only handle mailq when postfix user is present. The mailq command is also
# available when postfix is not installed. But it produces different outputs
# which are not handled by the check at the moment. So try to filter out the
# systems not using postfix by searching for the postfix user.
#
# Cannot take the whole outout. This could produce several MB of agent output
# on blocking queues.
# Only handle the last 6 lines (includes the summary line at the bottom and
# the last message in the queue. The last message is not used at the moment
# but it could be used to get the timestamp of the last message.
if which mailq >/dev/null 2>&1 && getent passwd postfix >/dev/null 2>&1; then
  echo '<<<postfix_mailq>>>'
  mailq | tail -n 6
fi

#Check status of qmail mailqueue
if type qmail-qstat >/dev/null
then
   echo "<<<qmail_stats>>>"
   qmail-qstat
fi

# check zpool status
if [ -x /sbin/zpool ]; then
   echo "<<<zpool_status>>>"
   /sbin/zpool status -x | grep -v "errors: No known data errors"
fi


# Statgrab
# To install: pkg install libstatgrab
if type statgrab 2>&1 >/dev/null ; then

    statgrab_vars="const. disk. general. page. proc. user."
    statgrab_vars_mem="mem. swap."
    statgrab_sections="proc disk page"

    statgrab $statgrab_vars     1> /tmp/statgrab.$$
    statgrab $statgrab_vars_mem 1>>/tmp/statgrab.$$


    for s in $statgrab_sections
    do
        echo "<<<statgrab_$s>>>"
        grep "^${s}\." /tmp/statgrab.$$ | cut -d. -f2-99 | sed 's/ *= */ /'
    done

    echo '<<<statgrab_net>>>'
    statgrab net. 2>&1 | cut -d. -f2-99 | sed 's/ *= */ /'

    echo '<<<statgrab_mem>>>'
    egrep "^(swap|mem)\." /tmp/statgrab.$$ | sed 's/ *= */ /'

    [ -f /tmp/statgrab.$$ ] && rm -f /tmp/statgrab.$$
fi


# Fileinfo-Check: put patterns for files into /etc/check_mk/fileinfo.cfg
if [ -r "$MK_CONFDIR/fileinfo.cfg" ] ; then
    echo '<<<fileinfo:sep(124)>>>'
    date +%s
    for line in $(cat "$MK_CONFDIR/fileinfo.cfg")
    do
        stat -f "%N|%z|%m" $line 2>/dev/null

        if [ $? -ne 0 ]; then
            echo "$line|missing|$(date +%s)"
        fi
    done
fi


# Local checks
echo '<<<local>>>'
if cd $LOCALDIR ; then
    for skript in $(ls) ; do
        if [ -f "$skript" -a -x "$skript" ] ; then
            ./$skript
        fi
    done
    # Call some plugins only every X'th minute
    for skript in [1-9]*/* ; do
        if [ -x "$skript" ] ; then
            run_cached local_${skript//\//\\} ${skript%/*} "$skript"
        fi
    done
fi

# Plugins
if cd $PLUGINSDIR; then
    for skript in $(ls) ; do
        if [ -f "$skript" -a -x "$skript" ] ; then
            ./$skript
        fi
    done
    # Call some plugins only every X'th minute
    for skript in [1-9]*/* ; do
        if [ -x "$skript" ] ; then
            run_cached plugins_${skript//\//\\} ${skript%/*} "$skript"
        fi
    done
fi


# MK's Remote Plugin Executor
if [ -e "$MK_CONFDIR/mrpe.cfg" ]
then
    echo '<<<mrpe>>>'
    grep -Ev '^[[:space:]]*($|#)' "$MK_CONFDIR/mrpe.cfg" | \
    while read descr cmdline
    do
        PLUGIN=${cmdline%% *}
        OUTPUT=$(eval "$cmdline")
        echo -n "(${PLUGIN##*/}) $descr $? $OUTPUT" | tr \\n \\1
        echo
    done
fi

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