Difference between revisions of "Monit"

__NOTOC__

=== How to install M/Monit from sources ===

* Download Monit tar file from tildeslash

wget http://www.tildeslash.com/monit/dist/monit-4.10.1.tar.gz

* Unpack and install

tar zxvf monit-4.10.1.tar.gz

cd monit-4.10.1

./configure

make

make install

=== How to setup M/Monit ===

* Open <tt>/etc/monit.conf</tt> and set/uncomment this values:

** Run Monit as daemon

set daemon 120

:* Send logs to /var/log/messages

set logfile syslog facility log_daemon

:* Setup Monit Web Service with authentication from anywhere

set httpd port 2812 and

allow user:password

:* Read configuration files for each service

include /etc/monit.d/*

* Open <tt>/etc/httpd/conf/httpd.conf</tt> and add the following lines:

# Avoid Monit activity to be logged on Apache log

SetEnvIf Request_URI "^/monit/token$" dontlog

CustomLog logs/access_log common env=!dontlog

* Open port on iptables to watch monit on TCP port 2812

iptables -A INPUT -p tcp --dport 2812 -j ACCEPT

=== How to configure M/Monit services ===

==== Apache ====

'''File:''' <tt>/etc/monit.d/httpd.conf</tt>

check process httpd with pidfile /var/run/httpd.pid

group apache

start program = "/sbin/service httpd start"

stop program = "/sbin/service httpd stop"

if failed port host 127.0.0.1 port 80 protocol http

and request "/api/restaurant/id"

then restart

if 5 restarts within 5 cycles then timeout

==== MySQL ====

'''File:''' <tt>/etc/monit.d/mysqld.conf</tt>

check process mysql with pidfile /var/run/mysqld/mysqld.pid

group mysql

start program = "/sbin/service mysqld start"

stop program = "/sbin/service mysqld stop"

if failed host 127.0.0.1 port 3306 protocol mysql

then restart

if 5 restarts within 5 cycles then timeout

==== Actionqueue ====

'''File:''' <tt>/etc/monit.d/actionqueue.conf</tt>

check process actionqueue with pidfile /var/run/actionqueue.pid

group root

start program = "/sbin/service actionqueue start"

stop program = "/sbin/service actionqueue stop"

if failed host 127.0.0.1 port 8443

then restart

if 5 restarts within 5 cycles then timeout

=== How to setup and start M/Monit service ===

==== Boot from init.d ====

* Register the service to start on boot

chkconfig monit on

* Start service

service monit start

==== Respawnning with inittab ====

* Append <tt>/etc/inittab</tt> to add:

mo:2345:respawn:/usr/bin/monit -Ic /etc/monit.conf

* Start monit

init q