291 lines
11 KiB
Bash
Executable File
291 lines
11 KiB
Bash
Executable File
#!/bin/bash
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trap "exit" INT TERM
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trap "kill 0" EXIT
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PARENT_PID=$$
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# Prepare
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BACKGROUND_TASKS=()
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# Checks pipe their corresponding container name in this pipe
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if [[ ! -p /tmp/com_pipe ]]; then
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mkfifo /tmp/com_pipe
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fi
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# Common functions
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progress() {
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SERVICE=${1}
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TOTAL=${2}
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CURRENT=${3}
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DIFF=${4}
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[[ -z ${DIFF} ]] && DIFF=0
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[[ -z ${TOTAL} || -z ${CURRENT} ]] && return
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[[ ${CURRENT} -gt ${TOTAL} ]] && return
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[[ ${CURRENT} -lt 0 ]] && CURRENT=0
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percent=$(( 200 * ${CURRENT} / ${TOTAL} % 2 + 100 * ${CURRENT} / ${TOTAL} ))
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completed=$(( ${percent} / 2 ))
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remaining=$(( 50 - ${completed} ))
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echo -ne "$(date) Health level: "
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echo -n "["
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printf "%0.s>" $(seq ${completed})
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[[ ${remaining} != 0 ]] && printf "%0.s." $(seq ${remaining})
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echo -en "] ${percent}% - Service: ${SERVICE}, health trend: "
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[[ ${DIFF} =~ ^-[1-9] ]] && echo -en "\e[31mnegative \e[0m" || echo -en "\e[32mpositive \e[0m"
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echo "(${DIFF})"
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}
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get_container_ip() {
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# ${1} is container
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CONTAINER_ID=
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CONTAINER_IP=
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until [[ ${CONTAINER_IP} =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; do
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sleep 1
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CONTAINER_ID=$(curl --silent --unix-socket /var/run/docker.sock http/containers/json?all=1 | jq -rc "map(select(.Names[] | contains (\"${1}\"))) | .[] .Id")
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CONTAINER_IP=$(curl --silent --unix-socket /var/run/docker.sock http/containers/${CONTAINER_ID}/json | jq -r '.NetworkSettings.Networks[].IPAddress')
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done
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echo ${CONTAINER_IP}
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}
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# Check functions
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nginx_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip nginx-mailcow)
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THRESHOLD=16
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_ping -4 -H ${HOST_IP} -w 2000,10% -c 4000,100% -p2 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_http -4 -H ${HOST_IP} -u / -p 8081 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "Nginx" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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mysql_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip mysql-mailcow)
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THRESHOLD=12
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_mysql -H ${HOST_IP} -P 3306 -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_mysql_query -H ${HOST_IP} -P 3306 -u ${DBUSER} -p ${DBPASS} -d ${DBNAME} -q "SELECT COUNT(*) FROM information_schema.tables" 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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sogo_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip sogo-mailcow)
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THRESHOLD=20
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_http -4 -H ${HOST_IP} -u /WebServerResources/css/theme-default.css -p 9192 -R md-default-theme 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_http -4 -H ${HOST_IP} -u /SOGo.index/ -p 20000 -R "SOGo\sGroupware" 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "SOGo" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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postfix_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip postfix-mailcow)
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THRESHOLD=16
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_smtp -4 -H ${HOST_IP} -p 25 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_smtp -4 -H ${HOST_IP} -p 588 -f watchdog -C "RCPT TO:null@localhost" -C DATA -C . -R 250 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_smtp -4 -H ${HOST_IP} -p 587 -S 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "Postfix" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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dovecot_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip dovecot-mailcow)
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THRESHOLD=24
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_smtp -4 -H ${HOST_IP} -p 24 -f "watchdog" -C "RCPT TO:<watchdog@invalid>" -L -R "User doesn't exist" 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_imap -4 -H ${HOST_IP} -p 993 -S -e "OK " 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_imap -4 -H ${HOST_IP} -p 143 -e "OK " 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_tcp -4 -H ${HOST_IP} -p 10001 -e "VERSION" 1>&2; err_count=$(( ${err_count} + $? ))
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/usr/lib/nagios/plugins/check_tcp -4 -H ${HOST_IP} -p 4190 -e "Dovecot ready" 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "Dovecot" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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phpfpm_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip php-fpm-mailcow)
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THRESHOLD=12
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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cgi-fcgi -bind -connect ${HOST_IP}:9000 | grep PHP 1>&2; err_count=$(( ${err_count} + ($? * 2)))
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/usr/lib/nagios/plugins/check_ping -4 -H ${HOST_IP} -w 2000,10% -c 4000,100% -p2 1>&2; err_count=$(( ${err_count} + $? ))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "PHP-FPM" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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dns_checks() {
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err_count=0
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diff_c=0
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HOST_IP=$(get_container_ip unbound-mailcow)
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THRESHOLD=28
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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 ${THRESHOLD} ]; do
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err_c_cur=${err_count}
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/usr/lib/nagios/plugins/check_dns -H google.com 1>&2; err_count=$(( ${err_count} + ($? * 2)))
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/usr/lib/nagios/plugins/check_dns -s ${HOST_IP} -H google.com 1>&2; err_count=$(( ${err_count} + ($? * 2)))
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dig +dnssec org. @${HOST_IP} | grep -E 'flags:.+ad' 1>&2; err_count=$(( ${err_count} + ($? * 2)))
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sleep $(( ( RANDOM % 30 ) + 10 ))
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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 "Unbound" ${THRESHOLD} $(( ${THRESHOLD} - ${err_count} )) ${diff_c}
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done
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return 1
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}
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# Create watchdog agents
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(
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while true; do
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if ! nginx_checks; then
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echo -e "\e[31m$(date) - Nginx hit error limit\e[0m"
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echo nginx-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! mysql_checks; then
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echo -e "\e[31m$(date) - MySQL hit error limit\e[0m"
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echo mysql-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! phpfpm_checks; then
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echo -e "\e[31m$(date) - PHP-FPM hit error limit\e[0m"
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echo php-fpm-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! sogo_checks; then
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echo -e "\e[31m$(date) - SOGo hit error limit\e[0m"
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echo sogo-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! postfix_checks; then
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echo -e "\e[31m$(date) - Postfix hit error limit\e[0m"
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echo postfix-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! dovecot_checks; then
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echo -e "\e[31m$(date) - Dovecot hit error limit\e[0m"
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echo dovecot-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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(
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while true; do
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if ! dns_checks; then
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echo -e "\e[31m$(date) - Unbound hit error limit\e[0m"
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#echo unbound-mailcow > /tmp/com_pipe
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fi
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done
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) &
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BACKGROUND_TASKS+=($!)
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# Monitor watchdog agents, stop script when agents fails and wait for respawn by Docker (restart:always:n)
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(
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while true; do
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for bg_task in ${BACKGROUND_TASKS[*]}; do
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if ! kill -0 ${bg_task} 21>&2; then
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echo "Worker ${bg_task} died, stopping watchdog and waiting for respawn..."
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kill -TERM ${PARENT_PID}
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fi
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sleep 1
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done
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done
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) &
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# Restart container when threshold limit reached
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while true; do
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CONTAINER_ID=
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read com_pipe_answer </tmp/com_pipe
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if [[ ${com_pipe_answer} =~ .+-mailcow ]]; then
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kill -STOP ${BACKGROUND_TASKS[*]}
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sleep 3
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CONTAINER_ID=$(curl --silent --unix-socket /var/run/docker.sock http/containers/json?all=1 | jq -rc "map(select(.Names[] | contains (\"${com_pipe_answer}\"))) | .[] .Id")
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if [[ ! -z ${CONTAINER_ID} ]]; then
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echo "Sending restart command to ${CONTAINER_ID}..."
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curl --silent --unix-socket /var/run/docker.sock -XPOST http/containers/${CONTAINER_ID}/restart
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fi
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echo "Wait for restarted container to settle and continue watching..."
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sleep 30s
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kill -CONT ${BACKGROUND_TASKS[*]}
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kill -USR1 ${BACKGROUND_TASKS[*]}
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fi
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done
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