[Watchdog] Add WATCHDOG_MYSQL_REPLICATION_CHECKS, minor fix
andryyy
parent
92f8b4a091
commit
20c29f8204
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@ -34,5 +34,6 @@ RUN apk add --update \
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&& chmod +x smtp-cli
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COPY watchdog.sh /watchdog.sh
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COPY check_mysql_slavestatus.sh /usr/lib/nagios/plugins/check_mysql_slavestatus.sh
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CMD /watchdog.sh 2> /dev/null
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@ -0,0 +1,223 @@
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#!/bin/bash
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#########################################################################
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# Script: check_mysql_slavestatus.sh #
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# Author: Claudio Kuenzler www.claudiokuenzler.com #
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# Purpose: Monitor MySQL Replication status with Nagios #
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# Description: Connects to given MySQL hosts and checks for running #
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# SLAVE state and delivers additional info #
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# Original: This script is a modified version of #
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# check mysql slave sql running written by dhirajt #
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# Thanks to: Victor Balada Diaz for his ideas added on 20080930 #
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# Soren Klintrup for stuff added on 20081015 #
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# Marc Feret for Slave_IO_Running check 20111227 #
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# Peter Lecki for his mods added on 20120803 #
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# Serge Victor for his mods added on 20131223 #
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# Omri Bahumi for his fix added on 20131230 #
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# Marc Falzon for his option mods added on 20190822 #
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# Andreas Pfeiffer for adding socket option on 20190822 #
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# History: #
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# 2008041700 Original Script modified #
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# 2008041701 Added additional info if status OK #
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# 2008041702 Added usage of script with params -H -u -p #
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# 2008041703 Added bindir variable for multiple platforms #
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# 2008041704 Added help because mankind needs help #
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# 2008093000 Using /bin/sh instead of /bin/bash #
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# 2008093001 Added port for MySQL server #
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# 2008093002 Added mysqldir if mysql binary is elsewhere #
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# 2008101501 Changed bindir/mysqldir to use PATH #
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# 2008101501 Use $() instead of `` to avoid forks #
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# 2008101501 Use ${} for variables to prevent problems #
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# 2008101501 Check if required commands exist #
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# 2008101501 Check if mysql connection works #
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# 2008101501 Exit with unknown status at script end #
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# 2008101501 Also display help if no option is given #
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# 2008101501 Add warning/critical check to delay #
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# 2011062200 Add perfdata #
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# 2011122700 Checking Slave_IO_Running #
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# 2012080300 Changed to use only one mysql query #
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# 2012080301 Added warn and crit delay as optional args #
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# 2012080302 Added standard -h option for syntax help #
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# 2012080303 Added check for mandatory options passed in #
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# 2012080304 Added error output from mysql #
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# 2012080305 Changed from 'cut' to 'awk' (eliminate ws) #
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# 2012111600 Do not show password in error output #
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# 2013042800 Changed PATH to use existing PATH, too #
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# 2013050800 Bugfix in PATH export #
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# 2013092700 Bugfix in PATH export #
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# 2013092701 Bugfix in getopts #
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# 2013101600 Rewrite of threshold logic and handling #
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# 2013101601 Optical clean up #
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# 2013101602 Rewrite help output #
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# 2013101700 Handle Slave IO in 'Connecting' state #
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# 2013101701 Minor changes in output, handling UNKWNON situations now #
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# 2013101702 Exit CRITICAL when Slave IO in Connecting state #
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# 2013123000 Slave_SQL_Running also matched Slave_SQL_Running_State #
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# 2015011600 Added 'moving' check to catch possible connection issues #
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# 2015011900 Use its own threshold for replication moving check #
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# 2019082200 Add support for mysql option file #
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# 2019082201 Improve password security (remove from mysql cli) #
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# 2019082202 Added socket parameter (-S) #
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# 2019082203 Use default port 3306, makes -P optional #
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# 2019082204 Fix moving subcheck, improve documentation #
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#########################################################################
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# Usage: ./check_mysql_slavestatus.sh (-o file|(-H dbhost [-P port]|-S socket) -u dbuser -p dbpass) [-s connection] [-w integer] [-c integer] [-m integer]
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#########################################################################
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help="\ncheck_mysql_slavestatus.sh (c) 2008-2019 GNU GPLv2 licence
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Usage: $0 (-o file|(-H dbhost [-P port]|-S socket) -u username -p password) [-s connection] [-w integer] [-c integer] [-m]\n
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Options:\n-o Path to option file containing connection settings (e.g. /home/nagios/.my.cnf). Note: If this option is used, -H, -u, -p parameters will become optional\n-H Hostname or IP of slave server\n-P MySQL Port of slave server (optional, defaults to 3306)\n-u Username of DB-user\n-p Password of DB-user\n-S database socket\n-s Connection name (optional, with multi-source replication)\n-w Replication delay in seconds for Warning status (optional)\n-c Replication delay in seconds for Critical status (optional)\n-m Threshold in seconds since when replication did not move (compares the slaves log position)\n
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Attention: The DB-user you type in must have CLIENT REPLICATION rights on the DB-server. Example:\n\tGRANT REPLICATION CLIENT on *.* TO 'nagios'@'%' IDENTIFIED BY 'secret';"
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STATE_OK=0 # define the exit code if status is OK
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STATE_WARNING=1 # define the exit code if status is Warning (not really used)
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STATE_CRITICAL=2 # define the exit code if status is Critical
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STATE_UNKNOWN=3 # define the exit code if status is Unknown
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export PATH=$PATH:/usr/local/bin:/usr/bin:/bin # Set path
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crit="No" # what is the answer of MySQL Slave_SQL_Running for a Critical status?
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ok="Yes" # what is the answer of MySQL Slave_SQL_Running for an OK status?
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port="-P 3306" # on which tcp port is the target MySQL slave listening?
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for cmd in mysql awk grep expr [
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do
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if ! `which ${cmd} &>/dev/null`
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then
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echo "UNKNOWN: This script requires the command '${cmd}' but it does not exist; please check if command exists and PATH is correct"
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exit ${STATE_UNKNOWN}
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fi
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done
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# Check for people who need help
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#########################################################################
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if [ "${1}" = "--help" -o "${#}" = "0" ];
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then
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echo -e "${help}";
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exit 1;
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fi
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# Important given variables for the DB-Connect
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#########################################################################
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while getopts "H:P:u:p:S:s:w:c:o:m:h" Input;
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do
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case ${Input} in
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H) host="-h ${OPTARG}";slavetarget=${OPTARG};;
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P) port="-P ${OPTARG}";;
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u) user="-u ${OPTARG}";;
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p) password="${OPTARG}"; export MYSQL_PWD="${OPTARG}";;
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S) socket="-S ${OPTARG}";;
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s) connection=\"${OPTARG}\";;
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w) warn_delay=${OPTARG};;
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c) crit_delay=${OPTARG};;
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o) optfile="--defaults-extra-file=${OPTARG}";;
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m) moving=${OPTARG};;
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h) echo -e "${help}"; exit 1;;
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\?) echo "Wrong option given. Check help (-h, --help) for usage."
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exit 1
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;;
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esac
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done
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# Check if we can write to tmp
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#########################################################################
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test -w /tmp && tmpfile="/tmp/mysql_slave_${slavetarget}_pos.txt"
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# Connect to the DB server and check for informations
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#########################################################################
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# Check whether all required arguments were passed in (either option file or full connection settings)
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if [[ -z "${optfile}" && -z "${host}" && -z "${socket}" ]]; then
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echo -e "Missing required parameter(s)"; exit ${STATE_UNKNOWN}
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elif [[ -n "${host}" && (-z "${user}" || -z "${password}") ]]; then
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echo -e "Missing required parameter(s)"; exit ${STATE_UNKNOWN}
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elif [[ -n "${socket}" && (-z "${user}" || -z "${password}") ]]; then
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echo -e "Missing required parameter(s)"; exit ${STATE_UNKNOWN}
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fi
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# Connect to the DB server and store output in vars
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if [[ -n $socket ]]; then
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ConnectionResult=$(mysql ${optfile} ${socket} ${user} -e "show slave ${connection} status\G" 2>&1)
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else
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ConnectionResult=$(mysql ${optfile} ${host} ${port} ${user} -e "show slave ${connection} status\G" 2>&1)
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fi
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if [ -z "`echo "${ConnectionResult}" |grep Slave_IO_State`" ]; then
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echo -e "CRITICAL: Unable to connect to server"
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exit ${STATE_CRITICAL}
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fi
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check=`echo "${ConnectionResult}" |grep Slave_SQL_Running: | awk '{print $2}'`
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checkio=`echo "${ConnectionResult}" |grep Slave_IO_Running: | awk '{print $2}'`
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masterinfo=`echo "${ConnectionResult}" |grep Master_Host: | awk '{print $2}'`
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delayinfo=`echo "${ConnectionResult}" |grep Seconds_Behind_Master: | awk '{print $2}'`
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readpos=`echo "${ConnectionResult}" |grep Read_Master_Log_Pos: | awk '{print $2}'`
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execpos=`echo "${ConnectionResult}" |grep Exec_Master_Log_Pos: | awk '{print $2}'`
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# Output of different exit states
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#########################################################################
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if [ ${check} = "NULL" ]; then
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echo "CRITICAL: Slave_SQL_Running is answering NULL"; exit ${STATE_CRITICAL};
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fi
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if [ ${check} = ${crit} ]; then
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echo "CRITICAL: ${host}:${port} Slave_SQL_Running: ${check}"; exit ${STATE_CRITICAL};
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fi
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if [ ${checkio} = ${crit} ]; then
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echo "CRITICAL: ${host} Slave_IO_Running: ${checkio}"; exit ${STATE_CRITICAL};
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fi
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if [ ${checkio} = "Connecting" ]; then
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echo "CRITICAL: ${host} Slave_IO_Running: ${checkio}"; exit ${STATE_CRITICAL};
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fi
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if [ ${check} = ${ok} ] && [ ${checkio} = ${ok} ]; then
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# Delay thresholds are set
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if [[ -n ${warn_delay} ]] && [[ -n ${crit_delay} ]]; then
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if ! [[ ${warn_delay} -gt 0 ]]; then echo "Warning threshold must be a valid integer greater than 0"; exit $STATE_UNKNOWN; fi
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if ! [[ ${crit_delay} -gt 0 ]]; then echo "Warning threshold must be a valid integer greater than 0"; exit $STATE_UNKNOWN; fi
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if [[ -z ${warn_delay} ]] || [[ -z ${crit_delay} ]]; then echo "Both warning and critical thresholds must be set"; exit $STATE_UNKNOWN; fi
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if [[ ${warn_delay} -gt ${crit_delay} ]]; then echo "Warning threshold cannot be greater than critical"; exit $STATE_UNKNOWN; fi
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if [[ ${delayinfo} -ge ${crit_delay} ]]
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then echo "CRITICAL: Slave is ${delayinfo} seconds behind Master | delay=${delayinfo}s"; exit ${STATE_CRITICAL}
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elif [[ ${delayinfo} -ge ${warn_delay} ]]
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then echo "WARNING: Slave is ${delayinfo} seconds behind Master | delay=${delayinfo}s"; exit ${STATE_WARNING}
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else
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# Everything looks OK here but now let us check if the replication is moving
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if [[ -n ${moving} ]] && [[ -n ${tmpfile} ]] && [[ $readpos -eq $execpos ]]
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then
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#echo "Debug: Read pos is $readpos - Exec pos is $execpos"
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# Check if tmp file exists
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curtime=`date +%s`
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if [[ -w $tmpfile ]]
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then
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tmpfiletime=`date +%s -r $tmpfile`
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if [[ `expr $curtime - $tmpfiletime` -gt ${moving} ]]
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then
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exectmp=`cat $tmpfile`
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#echo "Debug: Exec pos in tmpfile is $exectmp"
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if [[ $exectmp -eq $execpos ]]
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then
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# The value read from the tmp file and from db are the same. Replication hasnt moved!
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echo "WARNING: Slave replication has not moved in ${moving} seconds. Manual check required."; exit ${STATE_WARNING}
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else
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# Replication has moved since the tmp file was written. Delete tmp file and output OK.
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rm $tmpfile
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echo "OK: Slave SQL running: ${check} Slave IO running: ${checkio} / master: ${masterinfo} / slave is ${delayinfo} seconds behind master | delay=${delayinfo}s"; exit ${STATE_OK};
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fi
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else
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echo "OK: Slave SQL running: ${check} Slave IO running: ${checkio} / master: ${masterinfo} / slave is ${delayinfo} seconds behind master | delay=${delayinfo}s"; exit ${STATE_OK};
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fi
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else
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echo "$execpos" > $tmpfile
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echo "OK: Slave SQL running: ${check} Slave IO running: ${checkio} / master: ${masterinfo} / slave is ${delayinfo} seconds behind master | delay=${delayinfo}s"; exit ${STATE_OK};
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fi
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else # Everything OK (no additional moving check)
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echo "OK: Slave SQL running: ${check} Slave IO running: ${checkio} / master: ${masterinfo} / slave is ${delayinfo} seconds behind master | delay=${delayinfo}s"; exit ${STATE_OK};
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fi
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fi
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else
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# Without delay thresholds
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echo "OK: Slave SQL running: ${check} Slave IO running: ${checkio} / master: ${masterinfo} / slave is ${delayinfo} seconds behind master | delay=${delayinfo}s"
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exit ${STATE_OK};
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fi
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fi
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echo "UNKNOWN: should never reach this part (Slave_SQL_Running is ${check}, Slave_IO_Running is ${checkio})"
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exit ${STATE_UNKNOWN}
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@ -292,7 +292,6 @@ mysql_checks() {
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trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
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while [ ${err_count} -lt ${THRESHOLD} ]; do
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touch /tmp/mysql-mailcow; echo "$(tail -50 /tmp/mysql-mailcow)" > /tmp/mysql-mailcow
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host_ip=$(get_container_ip mysql-mailcow)
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_mysql -s /var/run/mysqld/mysqld.sock -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} 2>> /tmp/mysql-mailcow 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_mysql_query -s /var/run/mysqld/mysqld.sock -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} -q "SELECT COUNT(*) FROM information_schema.tables" 2>> /tmp/mysql-mailcow 1>&2; err_count=$(( ${err_count} + $? ))
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@ -310,6 +309,30 @@ mysql_checks() {
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return 1
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}
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mysql_repl_checks() {
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err_count=0
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diff_c=0
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THRESHOLD=${MYSQL_REPLICATION_THRESHOLD}
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# Reduce error count by 2 after restarting an unhealthy container
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trap "[ ${err_count} -gt 1 ] && err_count=$(( ${err_count} - 2 ))" USR1
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while [ ${err_count} -lt ${THRESHOLD} ]; do
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touch /tmp/mysql_repl_checks; echo "$(tail -50 /tmp/mysql_repl_checks)" > /tmp/mysql_repl_checks
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_mysql_slavestatus.sh -S /var/run/mysqld/mysqld.sock -u root -p ${DBROOT} 2>> /tmp/mysql_repl_checks 1>&2; err_count=$(( ${err_count} + $? ))
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[ ${err_c_cur} -eq ${err_count} ] && [ ! $((${err_count} - 1)) -lt 0 ] && err_count=$((${err_count} - 1)) diff_c=1
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[ ${err_c_cur} -ne ${err_count} ] && diff_c=$(( ${err_c_cur} - ${err_count} ))
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progress "MySQL/MariaDB replication" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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if [[ $? == 10 ]]; then
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diff_c=0
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sleep 60
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else
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diff_c=0
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sleep $(( ( RANDOM % 60 ) + 20 ))
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fi
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done
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return 1
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}
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sogo_checks() {
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err_count=0
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diff_c=0
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@ -670,6 +693,20 @@ echo "Spawned external_checks with PID ${PID}"
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BACKGROUND_TASKS+=(${PID})
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fi
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if [[ ${WATCHDOG_MYSQL_REPLICATION_CHECKS} =~ ^([yY][eE][sS]|[yY])+$ ]]; then
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(
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while true; do
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if ! mysql_repl_checks; then
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log_msg "MySQL replication check hit error limit"
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echo mysql_repl_checks > /tmp/com_pipe
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fi
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done
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) &
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PID=$!
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echo "Spawned mysql_repl_checks with PID ${PID}"
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BACKGROUND_TASKS+=(${PID})
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fi
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(
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while true; do
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if ! mysql_checks; then
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@ -885,6 +922,9 @@ while true; do
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elif [[ ${com_pipe_answer} == "external_checks" ]]; then
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log_msg "Your mailcow is an open relay!"
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[[ ! -z ${WATCHDOG_NOTIFY_EMAIL} ]] && mail_error "${com_pipe_answer}" "Please stop mailcow now and check your network configuration!"
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elif [[ ${com_pipe_answer} == "mysql_repl_checks" ]]; then
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log_msg "MySQL replication is not working properly"
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[[ ! -z ${WATCHDOG_NOTIFY_EMAIL} ]] && mail_error "${com_pipe_answer}"
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elif [[ ${com_pipe_answer} == "acme-mailcow" ]]; then
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log_msg "acme-mailcow did not complete successfully"
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[[ ! -z ${WATCHDOG_NOTIFY_EMAIL} ]] && mail_error "${com_pipe_answer}" "Please check acme-mailcow for further information."
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Reference in New Issue