Chef monit cookbook

Installs and configures monit, with a resource provider for managing additional monit checks.

Recipes

• monit::default: installs and optionally configures monit
• monit::repo: installs monit from a package repository
• monit::source: installs monit from source
• monit::config: configures monit
• monit::{crond,ntpd,postfix,rsyslog,snmpd,sshd}: install common service checks

Attributes

monit_check resource examples

External Service Check

monit_check 'facebook_api' do
  check_type  'host'
  check_id    'api.facebook.com'
  group       'external'
  tests [
    {
      'condition' => 'failed port 80 proto http',
      'action'    => 'alert'
    },
    {
      'condition' => 'failed port 443 type tcpSSL proto http',
      'action'    => 'alert'
    },
  ]
end

SSHD

monit_check 'sshd' do
  check_id  '/var/run/sshd.pid'
  group     'system'
  start     '/etc/init.d/ssh start'
  stop      '/etc/init.d/ssh stop'
  tests [
    {
      'condition' => "failed port #{node.openssh.server.port} proto ssh for 3 cycles",
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 5 cycles',
      'action'    => 'alert'
    },
  ]
end

Postfix

monit_check 'postfix' do
  check_id  '/var/spool/postfix/pid/master.pid'
  group     'system'
  start     '/etc/init.d/postfix start'
  stop      '/etc/init.d/postfix stop'
  tests [
    {
      'condition' => 'failed port 25 proto smtp',
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 5 cycles',
      'action'    => 'alert'
    },
  ]
end

Nginx

monit_check 'nginx' do
  check_id  '/var/run/nginx.pid'
  group     'app'
  start     '/etc/init.d/nginx start'
  stop      '/etc/init.d/nginx stop'
  tests [
    {
      'condition' => 'failed port 80',
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 5 cycles',
      'action'    => 'alert'
    }
  ]
end

Memcache

monit_check 'memcache' do
  check_id  '/var/run/memcached.pid'
  group     'app'
  start     '/etc/init.d/memcached start'
  stop      '/etc/init.d/memcached stop'
  tests [
    {
      'condition' => 'failed port 11211 proto memcache',
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 15 cycles',
      'action'    => 'alert'
    },
  ]
end

Redis

monit_check 'redis' do
  check_id  '/var/run/redis/redis-server.pid'
  group     'database'
  start     '/etc/init.d/redis-server start'
  stop      '/etc/init.d/redis-server stop'
  tests [
    {
      'condition' => 'failed host 127.0.0.1 port 6379 
                     send "SET MONIT-TEST value\r\n" expect "OK" 
                     send "EXISTS MONIT-TEST\r\n" expect ":1"',
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 5 cycles',
      'action'    => 'alert'
    },
  ]
end

Solr

monit_check 'solr' do
  check_id  '/var/run/tomcat6.pid'
  group     'app'
  start     '/etc/init.d/tomcat6 start'
  stop      '/etc/init.d/tomcat6 stop'
  tests [
    {
      'condition' => 'failed port 8080 proto http and request "/solr/admin/ping" for 2 cycles',
      'action'    => 'restart'
    },
    {
      'condition' => '3 restarts within 5 cycles',
      'action'    => 'timeout'
    },
  ]
end

MongoDB

monit_check 'mongo' do
  check_id  "#{node.mongodb.dbpath}/mongod.lock"
  group     'database'
  start     '/etc/init.d/mongodb start'
  stop      '/etc/init.d/mongodb stop'
  tests [
    {
      'condition' => "failed port #{node.mongodb.port} proto http for 2 cycles",
      'action'    => 'restart with timeout 60 seconds'
    },
    {
      'condition' => 'if 3 restarts within 10 cycles',
      'action'    => 'timeout'
    },
  ]
end