Install
apt-based
apt-get install monit
Following installs Monit 5.3 on Ubuntu 12.04. Which is very old!
Binary Install
Go to http://mmonit.com/monit/#download and pick correct binary for your system. Following lines will install Monit 5.14 for Ubuntu 64-bit.
cd ~
wget http://mmonit.com/monit/dist/binary/5.14/monit-5.14-linux-x64.tar.gz
tar zxvf monit-5.14-linux-x64.tar.gz
cd monit-5.14/
cp bin/monit /usr/bin/monit
mkdir /etc/monit
touch /etc/monit/monitrc
chmod 0700 /etc/monit/monitrc
ln -s /etc/monit/monitrc /etc/monitrc
wget https://gist.githubusercontent.com/rahul286/9975061/raw/1aa107e62ecaaa2dacfdb61a12f13efb6f15005b/monit -P /etc/init.d/
chmod u+x /etc/init.d/monit
echo "START=yes" > /etc/default/monit
monit -t
Config
Monit Config File
Add/Update following in /etc/monit/monitrc
#Monitoring Interval in Seconds
set daemon 60
#Enable Web Access
set httpd port 2812
allow admin:easyengine
#Event Queue for 5000 events
set eventqueue basedir /var/monit slots 5000
#MySQL Monitoring
check process mysqld with pidfile "/var/run/mysqld/mysqld.pid"
if cpu > 80% for 2 cycles then alert
#PHP-FPM
check process php5-fpm with pidfile "/var/run/php5-fpm.pid"
if cpu > 80% for 2 cycles then alert
#Nginx
check process nginx with pidfile "/var/run/nginx.pid"
if cpu > 80% for 2 cycles then alert
#System Monitoring
check system PUT_YOUR_HOSTNAME_HERE
if memory usage > 80% for 2 cycles then alert
if cpu usage (user) > 70% for 2 cycles then alert
if cpu usage (system) > 30% then alert
if cpu usage (wait) > 20% then alert
if loadavg (1min) > 6 for 2 cycles then alert
if loadavg (5min) > 4 for 2 cycles then alert
if swap usage > 5% then alert
check filesystem rootfs with path /
if space usage > 80% then alert
set mailserver localhost
set alert you@example.com
##mmonit (optional)
#set mmonit http://user:pass@IP:port/collector
You may also wish to change username admin and password easyengine. Also, change numbers 6 and 4 in loadavg lines based on number of CPU cores on your system.
Start
First test your config using monit -t command. Then start monit using service monit start
Verify
Run command monit status, it should something like:
The Monit daemon 5.13 uptime: 2m
System 'example.com'
status Running
monitoring status Monitored
load average [0.48] [0.40] [0.81]
cpu 0.0%us 0.0%sy 0.0%wa
memory usage 8276900 kB [25.1%]
swap usage 1192 kB [0.0%]
data collected Thu, 03 Apr 2014 10:41:45
#many more lines...
You may also open example.com:2182 in your browser to use web-based interface.
Monit-Graph
You can use commercial version M/Monit for a lot many features or free script monit-graph
Install monit-graph
cd /var/www/example.com/htdocs
git clone https://github.com/danschultzer/monit-graph mg
cd mg
chmod -R 0777 data
chmod 0644 data/index.php
Config File
Open config.php and adjust following values:
"url" => "localhost:2812",
"url_ssl" => false,
"http_username" => "admin",
"http_password" => "easyengine",
Setup Cron
Add following line to cron:
* * * * * php /var/www/example.com/htdocs/mg/cron.php >> /var/log/monit-graph.log
View Graphs
You can open http://example.com/mg in browser to see visual graphs!
TODO
- monit check program for custom script to monitor php5-fpm status page and nginx status page.
- Explore: https://github.com/perusio/monit-miscellaneous/blob/master/php-fpm-tcp
- Explore: https://github.com/regilero/check_phpfpm_status