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check_mg_agent for ash (e.g. OpenWRT)
#!/bin/ash
# +------------------------------------------------------------------+
# | ____ _ _ __ __ _ __ |
# | / ___| |__ ___ ___| | __ | \/ | |/ / |
# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
# | | |___| | | | __/ (__| < | | | | . \ |
# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
# | |
# | Copyright Mathias Kettner 2014 mk@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.
# 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_VARDIR="/var/lib/check_mk_agent"
# Provide information about the remote host. That helps when data
# is being sent only once to each remote host.
if [ "$REMOTE_HOST" ] ; then
export REMOTE=$REMOTE_HOST
elif [ "$SSH_CLIENT" ] ; then
export REMOTE=${SSH_CLIENT%% *}
fi
# Make sure, locally installed binaries are found
PATH=$PATH:/usr/local/bin
# All executables in PLUGINSDIR will simply be executed and their
# ouput appended to the output of the agent. Plugins define their own
# sections and must output headers with '<<<' and '>>>'
PLUGINSDIR=$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 about local checks.
LOCALDIR=$MK_LIBDIR/local
# All files in SPOOLDIR will simply appended to the agent
# output if they are not outdated (see below)
SPOOLDIR=$MK_VARDIR/spool
# 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
run_cached () {
local section=
if [ "$1" = -s ] ; then local section="echo '<<<$2>>>' ; " ; shift ; fi
local NAME=$1
local MAXAGE=$2
shift 2
local CMDLINE="$section$@"
if [ ! -d $MK_VARDIR/cache ]; then mkdir -p $MK_VARDIR/cache ; fi
CACHEFILE="$MK_VARDIR/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 -c %X "$CACHEFILE.new")
if [ $((NOW - CF_ATIME)) -ge $((MAXAGE * 2)) ] ; then
# Kill the process still accessing that file in case
# it is still running. This avoids overlapping processes!
fuser -k -9 "$CACHEFILE.new" >/dev/null 2>&1
rm -f "$CACHEFILE.new"
return
fi
fi
# Check if cache file exists and is recent enough
if [ -s "$CACHEFILE" ] ; then
local MTIME=$(stat -c %Y "$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
# When the command fails, the output is throws away ignored
echo "set -o noclobber ; exec > \"$CACHEFILE.new\" || exit 1 ; $CMDLINE && mv \"$CACHEFILE.new\" \"$CACHEFILE\" || rm -f \"$CACHEFILE\" \"$CACHEFILE.new\"" | nohup bash >/dev/null 2>&1 &
fi
}
# Make run_cached available for subshells (plugins, local checks, etc.)
export run_cached
echo '<<<check_mk>>>'
echo Version: 1.2.6p5
echo AgentOS: linux
echo AgentDirectory: $MK_CONFDIR
echo DataDirectory: $MK_VARDIR
echo SpoolDirectory: $SPOOLDIR
echo PluginsDirectory: $PLUGINSDIR
echo LocalDirectory: $LOCALDIR
# If we are called via xinetd, try to find only_from configuration
if [ -n "$REMOTE_HOST" ]
then
echo -n 'OnlyFrom: '
echo $(sed -n '/^service[[:space:]]*check_mk/,/}/s/^[[:space:]]*only_from[[:space:]]*=[[:space:]]*\(.*\)/\1/p' /etc/xinetd.d/* | head -n1)
fi
# Print out Partitions / Filesystems. (-P gives non-wrapped POSIXed output)
# Heads up: NFS-mounts are generally supressed to avoid agent hangs.
# If hard NFS mounts are configured or you have too large nfs retry/timeout
# settings, accessing those mounts from the agent would leave you with
# thousands of agent processes and, ultimately, a dead monitored system.
# These should generally be monitored on the NFS server, not on the clients.
echo '<<<df>>>'
# The exclusion list is getting a bit of a problem. -l should hide any remote FS but seems
# to be all but working.
df -PTk | sed 1d
# df inodes information
echo '<<<df>>>'
echo '[df_inodes_start]'
df -PT $excludefs | sed 1d
echo '[df_inodes_end]'
# Filesystem usage for ZFS
if type zfs > /dev/null 2>&1 ; then
echo '<<<zfsget>>>'
zfs get -Hp name,quota,used,avail,mountpoint,type -t filesystem,volume || \
zfs get -Hp name,quota,used,avail,mountpoint,type
echo '[df]'
df -PTlk -t zfs | sed 1d
fi
# Check NFS mounts by accessing them with stat -f (System
# call statfs()). If this lasts more then 2 seconds we
# consider it as hanging. We need waitmax.
if type waitmax >/dev/null
then
STAT_VERSION=$(stat --version | head -1 | cut -d" " -f4)
STAT_BROKE="5.3.0"
echo '<<<nfsmounts>>>'
sed -n '/ nfs4\? /s/[^ ]* \([^ ]*\) .*/\1/p' < /proc/mounts |
sed 's/\\040/ /g' |
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
echo '<<<cifsmounts>>>'
sed -n '/ cifs\? /s/[^ ]* \([^ ]*\) .*/\1/p' < /proc/mounts |
sed 's/\\040/ /g' |
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. Filesystems may switch to 'ro' in case
# of a read error.
echo '<<<mounts>>>'
grep ^/dev < /proc/mounts
# processes including username, without kernel processes
echo '<<<ps>>>'
ps | sed -e 1d -e 's/ *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) *\([^ ]*\) */(\1,\2,\3,\4,\5) /'
# Memory usage
echo '<<<mem>>>'
egrep -v '^Swap:|^Mem:|total:' < /proc/meminfo
# Load and number of processes
echo '<<<cpu>>>'
echo "$(cat /proc/loadavg) $(grep -E '^CPU|^processor' < /proc/cpuinfo | wc -l)"
# Uptime
echo '<<<uptime>>>'
cat /proc/uptime
# New variant: Information about speed and state in one section
echo '<<<lnx_if:sep(58)>>>'
sed 1,2d /proc/net/dev
if type ethtool > /dev/null
then
for eth in $(sed -e 1,2d < /proc/net/dev | cut -d':' -f1 | sort)
do
echo "[$eth]"
ethtool $eth | egrep '(Speed|Duplex|Link detected|Auto-negotiation):'
echo -en "\tAddress: " ; cat /sys/class/net/$eth/address ; echo
done
fi
# Current state of bonding interfaces
if [ -e /proc/net/bonding ] ; then
echo '<<<lnx_bonding:sep(58)>>>'
pushd /proc/net/bonding > /dev/null ; head -v -n 1000 * ; popd
fi
# Same for Open vSwitch bonding
if type ovs-appctl > /dev/null ; then
echo '<<<ovs_bonding:sep(58)>>>'
for bond in $(ovs-appctl bond/list | sed -e 1d | cut -f2) ; do
echo "[$bond]"
ovs-appctl bond/show $bond
done
fi
# Number of TCP connections in the various states
echo '<<<tcp_conn_stats>>>'
# waitmax 10 netstat -nt | awk ' /^tcp/ { c[$6]++; } END { for (x in c) { print x, c[x]; } }'
# New implementation: netstat is very slow for large TCP tables
cat /proc/net/tcp /proc/net/tcp6 2>/dev/null | awk ' /:/ { c[$4]++; } END { for (x in c) { print x, c[x]; } }'
# Linux Multipathing
if type multipath >/dev/null ; then
if [ -f /etc/multipath.conf ] ; then
echo '<<<multipath>>>'
multipath -l
fi
fi
# Performancecounter Platten
echo '<<<diskstat>>>'
date +%s
egrep ' (x?[shv]d[a-z]*|cciss/c[0-9]+d[0-9]+|emcpower[a-z]+|dm-[0-9]+|VxVM.*|mmcblk.*) ' < /proc/diskstats
if type dmsetup >/dev/null ; then
echo '[dmsetup_info]'
dmsetup info -c --noheadings --separator ' ' -o name,devno,vg_name,lv_name
fi
if [ -d /dev/vx/dsk ] ; then
echo '[vx_dsk]'
stat -c "%t %T %n" /dev/vx/dsk/*/*
fi
# Performancecounter Kernel
echo '<<<kernel>>>'
date +%s
cat /proc/vmstat /proc/stat
# Hardware sensors via IPMI (need ipmitool)
if type ipmitool > /dev/null
then
run_cached -s ipmi 300 "ipmitool sensor list | grep -v 'command failed' | sed -e 's/ *| */|/g' -e 's/ /_/g' -e 's/_*"'$'"//' -e 's/|/ /g' | egrep -v '^[^ ]+ na ' | grep -v ' discrete '"
fi
# IPMI data via ipmi-sensors (of freeipmi). Please make sure, that if you
# have installed freeipmi that IPMI is really support by your hardware.
if type ipmi-sensors >/dev/null
then
echo '<<<ipmi_sensors>>>'
# Newer ipmi-sensors version have new output format; Legacy format can be used
if ipmi-sensors --help | grep -q legacy-output; then
IPMI_FORMAT="--legacy-output"
else
IPMI_FORMAT=""
fi
# At least with ipmi-sensoirs 0.7.16 this group is Power_Unit instead of "Power Unit"
run_cached -s ipmi_sensors 300 "for class in Temperature Power_Unit Fan
do
ipmi-sensors $IPMI_FORMAT --sdr-cache-directory /var/cache -g "$class" | sed -e 's/ /_/g' -e 's/:_\?/ /g' -e 's@ \([^(]*\)_(\([^)]*\))@ \2_\1@'
# In case of a timeout immediately leave loop.
if [ $? = 255 ] ; then break ; fi
done"
fi
# RAID status of Linux RAID via device mapper
if type dmraid >/dev/null && DMSTATUS=$(dmraid -r)
then
echo '<<<dmraid>>>'
# Output name and status
dmraid -s | grep -e ^name -e ^status
# Output disk names of the RAID disks
DISKS=$(echo "$DMSTATUS" | cut -f1 -d\:)
for disk in $DISKS ; do
device=$(cat /sys/block/$(basename $disk)/device/model )
status=$(echo "$DMSTATUS" | grep ^${disk})
echo "$status Model: $device"
done
fi
# RAID status of LSI controllers via cfggen
if type cfggen > /dev/null ; then
echo '<<<lsi>>>'
cfggen 0 DISPLAY | egrep '(Target ID|State|Volume ID|Status of volume)[[:space:]]*:' | sed -e 's/ *//g' -e 's/:/ /'
fi
# RAID status of LSI MegaRAID controller via MegaCli. You can download that tool from:
# http://www.lsi.com/downloads/Public/MegaRAID%20Common%20Files/8.02.16_MegaCLI.zip
if type MegaCli >/dev/null ; then
MegaCli_bin="MegaCli"
elif type MegaCli64 >/dev/null ; then
MegaCli_bin="MegaCli64"
elif type megacli >/dev/null ; then
MegaCli_bin="megacli"
else
MegaCli_bin="unknown"
fi
if [ "$MegaCli_bin" != "unknown" ]; then
echo '<<<megaraid_pdisks>>>'
for part in $($MegaCli_bin -EncInfo -aALL -NoLog < /dev/null \
| sed -rn 's/:/ /g; s/[[:space:]]+/ /g; s/^ //; s/ $//; s/Number of enclosures on adapter ([0-9]+).*/adapter \1/g; /^(Enclosure|Device ID|adapter) [0-9]+$/ p'); do
[ $part = adapter ] && echo ""
[ $part = 'Enclosure' ] && echo -ne "\ndev2enc"
echo -n " $part"
done
echo
$MegaCli_bin -PDList -aALL -NoLog < /dev/null | egrep 'Enclosure|Raw Size|Slot Number|Device Id|Firmware state|Inquiry|Adapter'
echo '<<<megaraid_ldisks>>>'
$MegaCli_bin -LDInfo -Lall -aALL -NoLog < /dev/null | egrep 'Size|State|Number|Adapter|Virtual'
echo '<<<megaraid_bbu>>>'
$MegaCli_bin -AdpBbuCmd -GetBbuStatus -aALL -NoLog < /dev/null | grep -v Exit
fi
# RAID status of 3WARE disk controller (by Radoslaw Bak)
if type tw_cli > /dev/null ; then
for C in $(tw_cli show | awk 'NR < 4 { next } { print $1 }'); do
echo '<<<3ware_info>>>'
tw_cli /$C show all | egrep 'Model =|Firmware|Serial'
echo '<<<3ware_disks>>>'
tw_cli /$C show drivestatus | egrep 'p[0-9]' | sed "s/^/$C\//"
echo '<<<3ware_units>>>'
tw_cli /$C show unitstatus | egrep 'u[0-9]' | sed "s/^/$C\//"
done
fi
# RAID controllers from areca (Taiwan)
# cli64 can be found at ftp://ftp.areca.com.tw/RaidCards/AP_Drivers/Linux/CLI/
if type cli64 >/dev/null ; then
run_cached -s arc_raid_status 300 "cli64 rsf info | tail -n +3 | head -n -2"
fi
# VirtualBox Guests. Section must always been output. Otherwise the
# check would not be executed in case no guest additions are installed.
# And that is something the check wants to detect
# OpenVPN Clients. Currently we assume that the configuration # is in
# /etc/openvpn. We might find a safer way to find the configuration later.
if [ -e /etc/openvpn/openvpn-status.log ] ; then
echo '<<<openvpn_clients:sep(44)>>>'
sed -n -e '/CLIENT LIST/,/ROUTING TABLE/p' < /etc/openvpn/openvpn-status.log | sed -e 1,3d -e '$d'
fi
# Time synchronization with NTP
if type ntpq > /dev/null 2>&1 ; then
# remove heading, make first column space separated
run_cached -s ntp 30 "waitmax 5 ntpq -np | sed -e 1,2d -e 's/^\(.\)/\1 /' -e 's/^ /%/' || true"
fi
# Time synchronization with Chrony
if type chronyc > /dev/null 2>&1 ; then
# Force successful exit code. Otherwise section will be missing if daemon not running
run_cached -s chrony 30 "waitmax 5 chronyc tracking || true"
fi
if type nvidia-settings >/dev/null && [ -S /tmp/.X11-unix/X0 ]
then
echo '<<<nvidia>>>'
for var in GPUErrors GPUCoreTemp
do
DISPLAY=:0 waitmax 2 nvidia-settings -t -q $var | sed "s/^/$var: /"
done
fi
if [ -e /proc/drbd ]; then
echo '<<<drbd>>>'
cat /proc/drbd
fi
# Status of CUPS printer queues
if type lpstat > /dev/null 2>&1; then
if pgrep cups > /dev/null 2>&1; then
# first define a function to check cups
cups_queues () {
CPRINTCONF=/etc/cups/printers.conf
if [ -r "$CPRINTCONF" ] ; then
LOCAL_PRINTERS=$(grep -E "<(Default)?Printer .*>" $CPRINTCONF | awk '{print $2}' | sed -e 's/>//')
lpstat -p | while read LINE
do
PRINTER=$(echo $LINE | awk '{print $2}')
if echo "$LOCAL_PRINTERS" | grep -q "$PRINTER"; then
echo $LINE
fi
done
echo '---'
lpstat -o | while read LINE
do
PRINTER=${LINE%%-*}
if echo $LOCAL_PRINTERS | grep -q $PRINTER; then
echo $LINE
fi
done
else
lpstat -p
echo '---'
lpstat -o | sort
fi
}
# Make cups_queues available for subshell
export -f cups_queues
# Use cups_queues function with run_cached and cache time of 5 mins
run_cached -s cups_queues 300 "cups_queues"
fi
fi
# Heartbeat monitoring
# Different handling for heartbeat clusters with and without CRM
# for the resource state
if [ -S /var/run/heartbeat/crm/cib_ro -o -S /var/run/crm/cib_ro ] || pgrep crmd > /dev/null 2>&1; then
echo '<<<heartbeat_crm>>>'
crm_mon -1 -r | grep -v ^$ | sed 's/^ //; /^\sResource Group:/,$ s/^\s//; s/^\s/_/g'
fi
if type cl_status > /dev/null 2>&1; then
echo '<<<heartbeat_rscstatus>>>'
cl_status rscstatus
echo '<<<heartbeat_nodes>>>'
for NODE in $(cl_status listnodes); do
if [ $NODE != $(echo $HOSTNAME | tr 'A-Z' 'a-z') ]; then
STATUS=$(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 $LINK)"
done
echo
fi
done
fi
# Postfix mailqueue monitoring
#
# Only handle mailq when postfix user is present. The mailq command is also
# available when postfix is not installed. But it produces different outputs
# which are not handled by the check at the moment. So try to filter out the
# systems not using postfix by searching for the postfix user.a
#
# Cannot take the whole outout. This could produce several MB of agent output
# on blocking queues.
# Only handle the last 6 lines (includes the summary line at the bottom and
# the last message in the queue. The last message is not used at the moment
# but it could be used to get the timestamp of the last message.
if type postconf >/dev/null ; then
echo '<<<postfix_mailq>>>'
postfix_queue_dir=$(postconf -h queue_directory)
postfix_count=$(find $postfix_queue_dir/deferred -type f | wc -l)
postfix_size=$(du -ks $postfix_queue_dir/deferred | awk '{print $1 }')
if [ $postfix_count -gt 0 ]
then
echo -- $postfix_size Kbytes in $postfix_count Requests.
else
echo Mail queue is empty
fi
elif [ -x /usr/sbin/ssmtp ] ; then
echo '<<<postfix_mailq>>>'
mailq 2>&1 | sed 's/^[^:]*: \(.*\)/\1/' | tail -n 6
fi
#Check status of qmail mailqueue
if type qmail-qstat >/dev/null
then
echo "<<<qmail_stats>>>"
qmail-qstat
fi
# Check status of OMD sites
if type omd >/dev/null
then
run_cached -s omd_status 60 "omd status --bare --auto || true"
fi
# Welcome the ZFS check on Linux
# We do not endorse running ZFS on linux if your vendor doesnt support it ;)
# check zpool status
if type zpool >/dev/null; then
echo "<<<zpool_status>>>"
zpool status -x
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 -c "%n|%s|%Y" $line 2>/dev/null
if [ $? -ne 0 ]; then
echo "$line|missing|$(date +%s)"
fi
done
fi
# Gather thermal information provided e.g. by acpi
# At the moment only supporting thermal sensors
if ls /sys/class/thermal/thermal_zone* >/dev/null 2>&1; then
echo '<<<lnx_thermal>>>'
for F in /sys/class/thermal/thermal_zone*; do
echo -n "${F##*/} "
if [ ! -e $F/mode ] ; then echo -n "- " ; fi
cat $F/{mode,type,temp,trip_point_*} | tr \\n " "
echo
done
fi
# Libelle Business Shadow
if type trd >/dev/null; then
echo "<<<libelle_business_shadow:sep(58)>>>"
trd -s
fi
# MK's Remote Plugin Executor
if [ -e "$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
# 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 Xth minute
for skript in [1-9]*/* ; do
if [ -x "$skript" ] ; then
run_cached plugins_${skript//\//\\} ${skript%/*} "$skript"
fi
done
fi
# Agent output snippets created by cronjobs, etc.
if [ -d "$SPOOLDIR" ]
then
pushd "$SPOOLDIR" > /dev/null
now=$(date +%s)
for file in *
do
# output every file in this directory. If the file is prefixed
# with a number, then that number is the maximum age of the
# file in seconds. If the file is older than that, it is ignored.
maxage=""
part="$file"
# Each away all digits from the front of the filename and
# collect them in the variable maxage.
while [ "${part/#[0-9]/}" != "$part" ]
do
maxage=$maxage${part:0:1}
part=${part:1}
done
# If there is at least one digit, than we honor that.
if [ "$maxage" ] ; then
mtime=$(stat -c %Y "$file")
if [ $((now - mtime)) -gt $maxage ] ; then
continue
fi
fi
# Output the file
cat "$file"
done
popd > /dev/null
fi
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