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Adding check_keepalived

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Jan Wagner 2021-07-21 13:11:36 +02:00
parent c9eab33a18
commit 9df31e7682
4 changed files with 268 additions and 0 deletions
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3
check_keepalived/Makefile Normal file
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#/usr/bin/make -f
include ../common.mk

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check_keepalived/check_keepalived Normal file
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#!/bin/bash
# Monitoring plugin to check the keepalived status
usage(){
echo "Check: Is the keepalived service operate as it should.
--status | -s <state> ) Target state of the system (MASTER, BACKUP)
--interface | -i <interface> ) Interface for vrrp instance
--ha-ip | -ip <ip> ) Vrrp-ip
--interface2 | -i2 <interface> ) Interface for 2nd vrrp instance
--ha-ip2 | -ip2 <ip> ) 2nd vrrp-ip
--help | -h ) Usage
"
}
# Exit Codes
OK=0
WARNING=1
CRITICAL=2
UNKNOWN=3
# Command definitions
if [ -x "$(which cat)" ];
then
CAT="$(which cat)"
fi
if [ -x "$(which grep)" ];
then
GREP="$(which grep)"
fi
if [ -x "$(which ip)" ];
then
IP="$(which ip)"
fi
if [ -x "$(which pgrep)" ];
then
PG="$(which pgrep)"
fi
if [ -x "$(which wc)" ];
then
WC="$(which wc)"
fi
if [ "$1" = "" ]
then
echo "CRITICAL: No arguments given. Take a look at the usage:"
usage
exit "${CRITICAL}"
fi
# shifting through our command line arguments and setting our values
while [ "$1" != "" ]; do
case $1 in
--status | -s ) shift
TARGET_STATE="$1"
;;
--interface | -i ) shift
IFACE="$1"
;;
--ha-ip | -ip ) shift
HAIP="$1"
;;
--interface2 | -i2 ) shift
IFACE2="$1"
SEC_IP=true
;;
--ha-ip2 | -ip2 ) shift
HAIP2="$1"
;;
--help | -h ) usage
exit
;;
* ) usage
echo "CRITICAL: No valid arguments given. Take a look at the usage."
exit "${CRITICAL}"
esac
shift
done
# Config and commands
STAT_FILE='/tmp/keepalived.status'
PID_FILE='/run/keepalived.pid'
PID=$("${CAT}" "${PID_FILE}" 2>/dev/null)
SERVICE=$("${PG}" keepalived)
STATUS=(MASTER BACKUP FAULT)
CHECK_HAIP=$("${IP}" 2>/dev/null addr sh "${IFACE}" | "${GREP}" "${HAIP}" | "${WC}" -l)
CHECK_HAIP2=$("${IP}" 2>/dev/null addr sh "${IFACE2}" | "${GREP}" "${HAIP2}" | "${WC}" -l)
# Check files are valid
if [ ! -e "${STAT_FILE}" ]
then
echo "CRITICAL: Generated status file is missing. State could not be determined."
exit "${CRITICAL}"
fi
FILE_CONT=$("${CAT}" "${STAT_FILE}" 2>/dev/null)
if [ ! -e "${PID_FILE}" ]
then
echo "CRITICAL: PID file is missing, keepalived is not running."
exit "${CRITICAL}"
fi
# Check variables exists
if [ -z "${TARGET_STATE}" ]
then
echo "CRITICAL: Parameter 'status' not given. Check usage:"
usage
exit "${CRITICAL}"
fi
if [ -z "${IFACE}" ]
then
echo "CRITICAL: Parameter 'interface' not given. Check usage:"
usage
exit "${CRITICAL}"
fi
if [ -z "${HAIP}" ]
then
echo "CRITICAL: Parameter 'ha-ip' not given. Check usage:"
usage
exit "${CRITICAL}"
fi
# Check service is running
if [[ ! "${SERVICE}" =~ ${PID} ]]
then
echo "CRITICAL: keepalived is not running."
exit "${CRITICAL}"
fi
# Confirm valid STATUS
if [[ ! "${STATUS[*]}" =~ ${FILE_CONT} ]]
then
echo "CRITICAL: Status file contains unknown status or is empty. Take a look at ${STAT_FILE}."
exit "${CRITICAL}"
fi
# Check ha ip and status
if [ "${TARGET_STATE}" = "${STATUS[0]}" ] # Machine is defined as MASTER
then
case "${FILE_CONT}" in
MASTER ) STAT=ok
;;
BACKUP ) STAT=fail
;;
FAULT ) echo "CRITICAL: Machine status is FAULT."
exit "${CRITICAL}"
;;
* ) echo "CRITICAL: Status file contains unknown status or is empty. Take a look at ${STAT_FILE}."
exit "${CRITICAL}"
esac
if [ "${SEC_IP}" == "true" ] # 2nd ha instance
then
if [ "${CHECK_HAIP2}" == 0 ] && [ "${STAT}" == ok ]
then
echo "CRITICAL: 2nd HA IP ${HAIP2} is not up but machine is MASTER according to ${STAT_FILE}."
STAT_SEC_IP=CRIT
elif [ "${CHECK_HAIP2}" == 0 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: 2nd HA IP ${HAIP2} is not up, machine is BACKUP. Should be MASTER."
elif [ "${CHECK_HAIP2}" == 1 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: 2nd HA IP ${HAIP2} is up, but machine is BACKUP according to ${STAT_FILE}. Should be MASTER."
else
echo "OK: 2nd HA IP ${HAIP2} is up and machine is MASTER."
fi
fi
if [ "${CHECK_HAIP}" == 0 ] && [ "${STAT}" == ok ] # Target-actual comparison machine state; IP should be up
then
echo "CRITICAL: HA IP ${HAIP} is not up but machine is MASTER according to ${STAT_FILE}."
exit "${CRITICAL}"
elif [ "${CHECK_HAIP}" == 0 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: HA IP ${HAIP} is not up, machine is BACKUP. Should be MASTER."
exit "${CRITICAL}"
elif [ "${CHECK_HAIP}" == 1 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: HA IP ${HAIP} is up, but machine is BACKUP according to ${STAT_FILE}. Should be MASTER."
exit "${CRITICAL}"
else
echo "OK: HA IP ${HAIP} is up and machine is MASTER."
if [ "${STAT_SEC_IP}" == CRIT ]
then
exit "${CRITICAL}"
else
exit "${OK}"
fi
fi
elif [ "${TARGET_STATE}" = "${STATUS[1]}" ] # Machine is defined as BACKUP
then
case "${FILE_CONT}" in
MASTER ) STAT=fail
;;
BACKUP ) STAT=ok
;;
FAULT ) echo "CRITICAL: Machine status is FAULT."
exit "${CRITICAL}"
;;
* ) echo "CRITICAL: Status file contains unknown status or is empty."
exit "${CRITICAL}"
esac
if [ "${SEC_IP}" == "true" ] # 2nd ha instance
then
if [ "${CHECK_HAIP2}" == 1 ] && [ "${STAT}" == ok ]
then
echo "CRITICAL: 2nd HA IP ${HAIP2} is up but machine is BACKUP according to ${STAT_FILE}."
STAT_SEC_IP=CRIT
elif [ "${CHECK_HAIP2}" == 1 ] && [ "${STAT}" == fail ]
then
echo "WARNING: 2nd HA IP ${HAIP2} is up, machine is MASTER. Should be BACKUP."
elif [ "${CHECK_HAIP2}" == 0 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: 2nd HA IP ${HAIP2} is not up but machine is MASTER according to ${STAT_FILE}. Should be BACKUP."
else
echo "OK: 2nd HA IP ${HAIP2} is not up and machine is BACKUP."
fi
fi
if [ "${CHECK_HAIP}" == 1 ] && [ "${STAT}" == ok ] # Target-actual comparison machine state; IP should be down
then
echo "CRITICAL: HA IP ${HAIP} is up but machine is BACKUP according to ${STAT_FILE}."
exit "${CRITICAL}"
elif [ "${CHECK_HAIP}" == 1 ] && [ "${STAT}" == fail ]
then
echo "WARNING: HA IP ${HAIP} is up, machine is MASTER. Should be BACKUP."
exit "${WARNING}"
elif [ "${CHECK_HAIP}" == 0 ] && [ "${STAT}" == fail ]
then
echo "CRITICAL: HA IP ${HAIP} is not up but machine is MASTER according to ${STAT_FILE}. Should be BACKUP."
exit "${CRITICAL}"
else
echo "OK: HA IP ${HAIP} is not up and machine is BACKUP."
if [ "${STAT_SEC_IP}" == CRIT ]
then
exit "${CRITICAL}"
else
exit "${OK}"
fi
fi
else
echo "Unknown: Unknown status given. Check ${STAT_FILE} and script usage."
exit "${UNKNOWN}"
fi

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Uploaders: Jan Wagner <waja@cyconet.org>
Description: plugin checking keepalived status
Recommends: procps
Version: 0.0.1

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check_keepalived/copyright Normal file
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Copyright (C) 2021 Stella Sieber / TMT GmbH & Co. KG
License: GPL+
On Debian systems, the complete text of the GNU General
Public License can be found in "/usr/share/common-licenses/GPL".