* Added Max processes check to check_linux_process_limits plugin
* Added support for log_healthy in list_hc()
This commit is contained in:
Patrick Van der Veken
parent
3369aa3bef
commit
58bee85277
@ -12,6 +12,7 @@
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log_healthy="no"
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# -- user stanzas --
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# supported limit checks: Max open files; Max processes
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# format:
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# user:<user name>;<limit name>;<soft threshold in %>;<hard threshold in %>
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# note: <limit name> must exactly match the descriptor in /proc/<PID>/limits
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@ -19,6 +20,7 @@ log_healthy="no"
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user;postfix;Max open files;;75
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# -- process stanzas --
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# supported limit checks: Max open files
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# format:
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# process:<process name>;<limit name>;<soft threshold in %>;<hard threshold in %>
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# note: <limit name> must exactly match the descriptor in /proc/<PID>/limits
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@ -1438,8 +1438,10 @@ typeset FVERSION=""
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typeset FCONFIG=""
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typeset FSTATE=""
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typeset FFILE=""
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typeset HAS_FCONFIG=0
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typeset FHEALTHY=""
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typeset FSCHEDULED=0
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typeset HAS_FCONFIG=0
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typeset HAS_FHEALTHY=""
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typeset DISABLE_FFILE=""
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typeset HC_VERSION=""
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@ -1454,8 +1456,8 @@ fi
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# print header
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if [[ "${FACTION}" != "list" ]]
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then
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printf "%-30s\t%-8s\t%s\t\t%s\t%s\n" "Health Check" "State" "Version" "Config?" "Sched?"
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printf "%80s\n" | tr ' ' -
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printf "%-30s\t%-8s\t%s\t\t%s\t%s\t%s\n" "Health Check" "State" "Version" "Config?" "Sched?" "H+?"
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printf "%100s\n" | tr ' ' -
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fi
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print "${FPATH}" | tr ':' '\n' | grep -v "core$" | sort 2>/dev/null | while read -r FDIR
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do
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@ -1470,8 +1472,27 @@ do
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if (( HAS_FCONFIG != 0 ))
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then
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FCONFIG="Yes"
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if [[ -r ${CONFIG_DIR}/${FNAME#function *}.conf ]]
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then
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# check for log_healthy parameter
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HAS_FHEALTHY=$(_CONFIG_FILE="${CONFIG_DIR}/${FNAME#function *}.conf" data_get_lvalue_from_config 'log_healthy')
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case "${HAS_FHEALTHY}" in
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no|NO|No)
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FHEALTHY="No"
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;;
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yes|YES|Yes)
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FHEALTHY="Yes"
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;;
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*)
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FHEALTHY="N/A"
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;;
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esac
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else
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FHEALTHY="N/A"
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fi
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else
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FCONFIG="No"
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FHEALTHY="N/A"
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fi
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# check state
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DISABLE_FFILE="$(print ${FFILE##*/} | sed 's/\.sh$//')"
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@ -1495,12 +1516,13 @@ do
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# show results
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if [[ "${FACTION}" != "list" ]]
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then
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printf "%-30s\t%-8s\t%s\t%s\t%s\n" \
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printf "%-30s\t%-8s\t%s\t%s\t%s\t%s\n" \
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"${FNAME#function *}" \
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"${FSTATE}" \
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"${FVERSION#typeset _VERSION=*}" \
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"${FCONFIG}" \
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"${FSCHEDULED}"
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"${FSCHEDULED}" \
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"${FHEALTHY}"
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else
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printf "%s\n" "${FNAME#function *}"
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fi
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@ -1530,6 +1552,12 @@ then
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print "current FPATH: ${FPATH}"
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fi
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# legend
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print
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print "Config?: plugin has a default configuration files (Yes/No)"
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print "Sched? : plugin is scheduled through cron (Yes/No)"
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print "H+? : plugin will log/show passed health checks too (Yes/No/Not applicable)"
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return 0
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}
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@ -2,7 +2,7 @@
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#******************************************************************************
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# @(#) check_linux_process_limits.sh
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#******************************************************************************
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# @(#) Copyright (C) 2016 by KUDOS BVBA (info@kudos.be). All rights reserved.
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# @(#) Copyright (C) 2018 by KUDOS BVBA (info@kudos.be). All rights reserved.
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#
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# This program is a free software; you can redistribute it and/or modify
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# it under the same terms of the GNU General Public License as published by
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@ -46,7 +46,8 @@ typeset _STC=0
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typeset _DUMMY=""
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typeset _LINE_COUNT=1
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typeset _LOG_HEALTHY=0
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typeset _OPEN_FILES=0
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typeset _MAX_OPEN_FILES=0
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typeset _MAX_PROCESSES=0
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typeset _PROCESS=""
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typeset _PROCESS_LIMIT=""
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typeset _PROCESS_SOFT_THRESHOLD=0
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@ -129,33 +130,36 @@ do
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fi
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fi
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# collect ps info
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(( ARG_DEBUG != 0 )) && debug "collecting information for process class ${_PROCESS}"
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_PROCESS_PS=$(_get_psinfo_by_process "${_PROCESS}")
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if [[ -z "${_PROCESS_PS}" ]]
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then
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warn "could not find any matching processes for process ${_PROCESS}"
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continue
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fi
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print "${_PROCESS_PS}" | while read _PROCESS_PS_PID _PROCESS_PS_USER
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do
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(( ARG_DEBUG != 0 )) && debug "checking process ${_PROCESS_PS_PID}"
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# get current values and check thresholds
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case "${_PROCESS_LIMIT}" in
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"Max open files"|"MAX OPEN FILES"|"max open files")
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_OPEN_FILES=$(_get_open_files ${_PROCESS_PS_PID})
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# SOFT limit
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_check_limit "${_PROCESS_LIMIT}" soft ${_PROCESS_PS_PID} ${_PROCESS_PS_USER} ${_PROCESS} ${_PROCESS_SOFT_THRESHOLD} ${_OPEN_FILES} ${_LOG_HEALTHY}
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# HARD limit
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_check_limit "${_PROCESS_LIMIT}" hard ${_PROCESS_PS_PID} ${_PROCESS_PS_USER} ${_PROCESS} ${_PROCESS_HARD_THRESHOLD} ${_OPEN_FILES} ${_LOG_HEALTHY}
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;;
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*)
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# no other limits are supported yet ;-)
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warn "'${_PROCESS_LIMIT}' is an unsupported limit check"
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# which limit to check?
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case "${_PROCESS_LIMIT}" in
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"Max open files")
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# collect ps info
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(( ARG_DEBUG != 0 )) && debug "${_PROCESS_LIMIT}: collecting information for process class ${_PROCESS}"
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_PROCESS_PS=$(_get_psinfo_by_process "${_PROCESS}")
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if [[ -z "${_PROCESS_PS}" ]]
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then
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warn "${_PROCESS_LIMIT}: could not find any matching processes for process ${_PROCESS}"
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continue
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;;
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esac
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done
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fi
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print "${_PROCESS_PS}" | while read _PROCESS_PS_PID _PROCESS_PS_USER
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do
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(( ARG_DEBUG != 0 )) && debug "${_PROCESS_LIMIT}: checking process ${_PROCESS_PS_PID}"
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# get current values and check thresholds
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_MAX_OPEN_FILES=$(_get_open_files ${_PROCESS_PS_PID})
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# SOFT limit
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_check_limit "${_PROCESS_LIMIT}" soft ${_PROCESS_PS_PID} ${_PROCESS_PS_USER} \
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${_PROCESS} ${_PROCESS_SOFT_THRESHOLD} ${_MAX_OPEN_FILES} ${_LOG_HEALTHY}
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# HARD limit
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_check_limit "${_PROCESS_LIMIT}" hard ${_PROCESS_PS_PID} ${_PROCESS_PS_USER} \
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${_PROCESS} ${_PROCESS_HARD_THRESHOLD} ${_MAX_OPEN_FILES} ${_LOG_HEALTHY}
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done
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;;
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*)
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# no other limits are supported yet ;-)
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warn "'${_PROCESS_LIMIT}' is an unsupported limit check"
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continue
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;;
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esac
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_LINE_COUNT=$(( _LINE_COUNT + 1 ))
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done
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@ -190,33 +194,46 @@ do
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fi
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fi
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# collect ps info
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(( ARG_DEBUG != 0 )) && debug "collecting information for user ${_USER}"
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_USER_PS=$(_get_psinfo_by_user "${_USER}")
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if [[ -z "${_USER_PS}" ]]
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then
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warn "could not find any matching processes for user ${_USER}"
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continue
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fi
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print "${_USER_PS}" | while read _USER_PS_PID _USER_PS_COMM
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do
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(( ARG_DEBUG != 0 )) && debug "checking process ${_USER_PS_PID}"
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# get current values and check thresholds
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case "${_USER_LIMIT}" in
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"Max open files"|"MAX OPEN FILES"|"max open files")
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_OPEN_FILES=$(_get_open_files ${_USER_PS_PID})
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# SOFT limit
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_check_limit "${_USER_LIMIT}" soft ${_USER_PS_PID} ${_USER} ${_USER_PS_COMM} ${_USER_SOFT_THRESHOLD} ${_OPEN_FILES} ${_LOG_HEALTHY}
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# HARD limit
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_check_limit "${_USER_LIMIT}" hard ${_USER_PS_PID} ${_USER} ${_USER_PS_COMM} ${_USER_HARD_THRESHOLD} ${_OPEN_FILES} ${_LOG_HEALTHY}
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;;
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*)
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# no other limits are supported yet ;-)
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warn "'${_USER_LIMIT}' is an unsupported limit check"
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# which limit to check?
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case "${_USER_LIMIT}" in
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"Max open files")
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# collect ps info
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(( ARG_DEBUG != 0 )) && debug "${_USER_LIMIT}: collecting information for user ${_USER}"
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_USER_PS=$(_get_psinfo_by_user "${_USER}")
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if [[ -z "${_USER_PS}" ]]
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then
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warn "${_USER_LIMIT}: could not find any matching processes for user ${_USER}"
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continue
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;;
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esac
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done
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fi
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print "${_USER_PS}" | while read _USER_PS_PID _USER_PS_COMM
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do
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(( ARG_DEBUG != 0 )) && debug "${_USER_LIMIT}: checking process ${_USER_PS_PID}"
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# get current values and check thresholds
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_MAX_OPEN_FILES=$(_get_open_files ${_USER_PS_PID})
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# SOFT limit
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_check_limit "${_USER_LIMIT}" soft ${_USER_PS_PID} ${_USER} ${_USER_PS_COMM} \
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${_USER_SOFT_THRESHOLD} ${_MAX_OPEN_FILES} ${_LOG_HEALTHY}
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# HARD limit
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_check_limit "${_USER_LIMIT}" hard ${_USER_PS_PID} ${_USER} ${_USER_PS_COMM} \
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${_USER_HARD_THRESHOLD} ${_MAX_OPEN_FILES} ${_LOG_HEALTHY}
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done
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;;
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"Max processes")
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(( ARG_DEBUG != 0 )) && debug "${_USER_LIMIT}: collecting information for user ${_USER}"
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_MAX_PROCESSES=$(_get_processes ${_USER})
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# SOFT limit
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_check_limit "${_USER_LIMIT}" soft 0 ${_USER} "" ${_USER_SOFT_THRESHOLD} \
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${_MAX_PROCESSES} ${_LOG_HEALTHY}
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# HARD limit
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_check_limit "${_USER_LIMIT}" hard 0 ${_USER} "" ${_USER_HARD_THRESHOLD} \
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${_MAX_PROCESSES} ${_LOG_HEALTHY}
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;;
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*)
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# no other limits are supported yet ;-)
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warn "'${_USER_LIMIT}' is an unsupported limit check"
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continue
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;;
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esac
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_LINE_COUNT=$(( _LINE_COUNT + 1 ))
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done
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@ -254,45 +271,79 @@ function _check_limit
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{
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typeset _LIMIT_NAME="${1}"
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typeset _LIMIT_TYPE="${2}"
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typeset _LIMIT_PID=${3}
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typeset _LIMIT_PID=${3} # can be 0
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typeset _LIMIT_USER="${4}"
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typeset _LIMIT_PROCESS="${5}"
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typeset _LIMIT_PROCESS="${5}" # can be ""
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typeset _LIMIT_THRESHOLD=${6}
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typeset _CURR_VALUE=${7}
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typeset _LOG_HEALTHY=${8}
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typeset _LIMIT_COMMAND=""
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typeset _LIMIT_ENTRY=""
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typeset _LIMIT_FIELD=0
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typeset _MSG_BIT=""
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(( ARG_DEBUG != 0 && ARG_DEBUG_LEVEL > 0 )) && set ${DEBUG_OPTS}
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# check for empties
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(( _LIMIT_PID == 0 )) && _LIMIT_PID="N/A"
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[[ -z "${_LIMIT_PROCESS}" ]] && _LIMIT_PROCESS="N/A"
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if [[ -n "${_LIMIT_THRESHOLD}" ]]
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then
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_LIMIT_ENTRY=$(grep -i "${_LIMIT_NAME}" /proc/${_LIMIT_PID}/limits 2>/dev/null)
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if [[ -z "${_LIMIT_ENTRY}" ]]
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then
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warn "unable to gather limits information (${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS})"
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return 1
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fi
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case "${_LIMIT_TYPE}" in
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soft)
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_LIMIT_VALUE=$(print "${_LIMIT_ENTRY}" | sed -s "s/${_LIMIT_NAME}//g" 2>/dev/null | awk '{ print $1}' 2>/dev/null)
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;;
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hard)
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_LIMIT_VALUE=$(print "${_LIMIT_ENTRY}" | sed -s "s/${_LIMIT_NAME}//g" 2>/dev/null | awk '{ print $2}' 2>/dev/null)
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# get limit value
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case "${_LIMIT_NAME}" in
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"Max open files")
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_LIMIT_ENTRY=$(grep -i "${_LIMIT_NAME}" /proc/${_LIMIT_PID}/limits 2>/dev/null)
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if [[ -z "${_LIMIT_ENTRY}" ]]
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then
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warn "${_LIMIT_TYPE}: unable to gather limits information (${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS})"
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return 1
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fi
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case "${_LIMIT_TYPE}" in
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soft)
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_LIMIT_FIELD=1
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;;
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hard)
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_LIMIT_FIELD=2
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;;
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esac
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_LIMIT_VALUE=$(print "${_LIMIT_ENTRY}" | sed -s "s/${_LIMIT_NAME}//g" 2>/dev/null |\
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awk -v f="${_LIMIT_FIELD}" '{ print $f}' 2>/dev/null)
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_MSG_BIT="${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS}"
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;;
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"Max processes")
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case "${_LIMIT_TYPE}" in
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soft)
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_LIMIT_COMMAND="ulimit -a"
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;;
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hard)
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_LIMIT_COMMAND="ulimit -Ha"
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;;
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esac
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_LIMIT_VALUE=$(su - ${_LIMIT_USER} -c "${_LIMIT_COMMAND}" 2>/dev/null |\
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grep -i "max user processes" 2>/dev/null | sed -s "s/max user processes//g" 2>/dev/null |\
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awk '{ print $2}' 2>/dev/null)
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if [[ -z "${_LIMIT_VALUE}" ]]
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then
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warn "${_LIMIT_TYPE}: unable to gather limits information (${_LIMIT_USER})"
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return 1
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fi
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_MSG_BIT="${_LIMIT_USER}"
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;;
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esac
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# check limit value -> threshold
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if [[ "${_LIMIT_VALUE}" = "unlimited" ]]
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then
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log "limit (${_LIMIT_TYPE} on '${_LIMIT_NAME}' is unlimited (${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS})"
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log "limit (${_LIMIT_TYPE} on '${_LIMIT_NAME}' is unlimited (${_MSG_BIT})"
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return 0
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else
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if (( _CURR_VALUE > (_LIMIT_VALUE * _LIMIT_THRESHOLD / 100) ))
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then
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_MSG="(${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS}) limit (${_LIMIT_TYPE}) on '${_LIMIT_NAME}' has been surpassed (${_CURR_VALUE} > ${_LIMIT_VALUE} @${_LIMIT_THRESHOLD}%)"
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_MSG="(${_MSG_BIT}) limit (${_LIMIT_TYPE}) on '${_LIMIT_NAME}' has been surpassed (${_CURR_VALUE} > ${_LIMIT_VALUE} @${_LIMIT_THRESHOLD}%)"
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log_hc "$0" 1 "${_MSG}" ${_CURR_VALUE} $(( _LIMIT_VALUE * _LIMIT_THRESHOLD / 100 ))
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else
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if (( _LOG_HEALTHY > 0 ))
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then
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_MSG="(${_LIMIT_PID}/${_LIMIT_USER}/${_LIMIT_PROCESS}) limit (${_LIMIT_TYPE}) on '${_LIMIT_NAME}' is safe (${_CURR_VALUE} <= ${_LIMIT_VALUE} @${_LIMIT_THRESHOLD}%)"
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_MSG="(${_MSG_BIT}) limit (${_LIMIT_TYPE}) on '${_LIMIT_NAME}' is safe (${_CURR_VALUE} <= ${_LIMIT_VALUE} @${_LIMIT_THRESHOLD}%)"
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log_hc "$0" 0 "${_MSG}" ${_CURR_VALUE} $(( _LIMIT_VALUE * _LIMIT_THRESHOLD / 100 ))
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fi
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fi
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@ -314,6 +365,16 @@ ls -f /proc/${1}/fd/ 2>/dev/null | wc -l 2>/dev/null
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return 0
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}
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# -----------------------------------------------------------------------------
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function _get_processes
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{
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(( ARG_DEBUG != 0 && ARG_DEBUG_LEVEL > 0 )) && set ${DEBUG_OPTS}
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ps -U ${1} --no-headers 2>/dev/null | wc -l 2>/dev/null
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return 0
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}
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# -----------------------------------------------------------------------------
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function _show_usage
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{
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@ -325,7 +386,10 @@ CONFIG : $3 with:
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and formatted stanzas:
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user:<user_name>:<limit_name>:<soft_limit_threshold_%>:<hard_limit_threshold_%>
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process:<process_name>:<limit_name>:<soft_limit_threshold_%>:<hard_limit_threshold_%>
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PURPOSE : Checks the value(s) of the process limits from /proc/*/limits
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PURPOSE : Checks the value(s) of the process limits from /proc/*/limits or ulimit
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Currenty following checks are supported:
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* Max open files (/proc/*/limits)
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* Max processes (ulimit)
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EOT
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