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addons:monit:start

Introduction

Monit is a utility for managing and monitoring processes, files, directories and filesystems on a Unix system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. E.g. Monit can start a process if it does not run, restart a process if it does not respond and stop a process if it uses too much resources. You may use Monit to monitor files, directories and filesystems for changes, such as timestamps changes, checksum changes or size changes.

Monit manpage Monit slideshow

Configuration

The monit addon comes with a default configuration file monitrc in /etc.

Examples

Monitor asterisk instance

check process asterisk with pidfile /var/run/asterisk/asterisk.pid
        start   = "/etc/init.d/asterisk start"
        stop    = "/etc/init.d/asterisk stop"
        restart = "/etc/init.d/asterisk restart"
        if failed host secure.dus.net port 5061 type TCP then alert
        
check host proxy.dus.net with address proxy.dus.net
        if failed
                port 5060 type tcp protocol sip
                with target "proxy.dus.net:5060"
        then alert

check host sipgate.de with address sipgate.de
        if failed
                port 5060 type udp protocol sip
                with target "sipgate.de:5060"
        then alert

check file asterisk-log with path /var/log/asterisk/messages
       if match ".*Wrong password.*" then alert
       if match "Oh dear... we couldn't allocate a port for RTP instance" then alert
       if match "Registration for '41.*timed out" then alert
       if match "Registration for '42.*timed out" then exec "/usr/sbin/asterisk -r -x 'core restart now'"

check file asterisk-security path /var/log/asterisk/security
       if match "InvalidPassword" then alert

Monitor VDR process

check file vdr-log with path /var/log/vdr                                                                                                                                          
        if match "ERROR: video data stream broken" then alert #exec "/etc/init.d/runvdr-server restart"                                                                            
        if match "SATIP-ERROR: Connect failed" then alert #exec "/etc/init.d/runvdr-server restart"

check process vdr-server with pidfile /var/run/runvdr-server.pid                                                                                                                   
        start program = "/etc/init.d/runvdr-server start" with timeout 60 seconds                                                                                                  
        stop  program = "/etc/init.d/runvdr-server stop"
        if memory usage > 25% for 5 cycles then alert
        if memory usage > 30% for 5 cycles then restart
addons/monit/start.txt · Last modified: 2015/03/23 20:01 by Dirk Wagner