2019-09-29 22:32:27 +02:00
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#!/bin/bash
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################################################################################
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# BSD 3-Clause License
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#
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# Copyright (c) 2019, Alban Vidal <alban.vidal@zordhak.fr>
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# All rights reserved.
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#
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# Please see license file on root of this directory
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################################################################################
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# !! GIT FILE !!
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# https://framagit.org/zorval/scripts/check-nrpe
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################################################################################
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# ConnTrack files
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FILE_CONNTRACK_MAX="/proc/sys/net/netfilter/nf_conntrack_max"
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FILE_CONNTRACK_COUNT="/proc/sys/net/netfilter/nf_conntrack_count"
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if [[ ! -f "$FILE_CONNTRACK_MAX" || ! -f "$FILE_CONNTRACK_COUNT" ]] ; then
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echo "Error, one of this files does not exists :"
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echo " - $FILE_CONNTRACK_MAX"
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echo " - $FILE_CONNTRACK_COUNT"
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2019-09-30 07:26:41 +02:00
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exit 2
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2019-09-29 22:32:27 +02:00
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fi
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################################################################################
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2019-09-29 22:36:15 +02:00
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# If environnement file exist, we load it
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2021-04-10 08:00:46 +02:00
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if [ -f /etc/zorval/env_check_available_conntrack ] ; then
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source /etc/zorval/env_check_available_conntrack
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2019-09-29 22:36:15 +02:00
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fi
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2019-09-29 22:32:27 +02:00
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# Initialize variables
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RESULT=""
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PERF_DATA=""
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CONNTRACK_WARN=${CONNTRACK_WARN:=80}
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CONNTRACK_CRIT=${CONNTRACK_CRIT:=90}
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EXIT_CODE=0
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################################################################################
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# Get conntrack values
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CONNTRACK_MAX=$(cat $FILE_CONNTRACK_MAX)
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CONNTRACK_COUNT=$(cat $FILE_CONNTRACK_COUNT)
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WARN_COUNT=$(( CONNTRACK_MAX * CONNTRACK_WARN / 100 ))
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CRIT_COUNT=$(( CONNTRACK_MAX * CONNTRACK_CRIT / 100 ))
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USAGE_PERCENT=$(( CONNTRACK_COUNT * 100 / CONNTRACK_MAX ))
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# Test percent for output
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if [ $USAGE_PERCENT -ge $CONNTRACK_CRIT ] ; then
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EXIT_CODE=2
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elif [ $USAGE_PERCENT -ge $CONNTRACK_WARN ] ; then
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EXIT_CODE=1
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fi
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RESULT="Conntrack usage: ${USAGE_PERCENT}% (${CONNTRACK_COUNT}/${CONNTRACK_MAX})"
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PERF_DATA="conntrack_table=$CONNTRACK_COUNT;$WARN_COUNT;$CRIT_COUNT;0;$CONNTRACK_MAX"
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echo "$RESULT | $PERF_DATA"
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exit $EXIT_CODE
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