Chef monit cookbook

Installs and configures monit.

Also exposes an LWRP for adding and managing additional monit control files.

Attributes

• node['monit']['config']['daemon'] - controls polling frequency
• node['monit']['config']['mailservers'] - specify mail servers to use
• node['monit']['config']['subscribers'] - controls alert recipients
• node['monit']['config']['mail_from'] - controls alert email from address
• node['monit']['config']['mail_subject'] - controls alert email subject
• node['monit']['config']['mail_message'] - controls alert email message
• node['monit']['config']['mmonit_host'] - controls the M/Monit server
• and more!

Check attributes for the full list.

Usage

Attributes

default_attributes(
  'monit' => {
    'config' => {
      'poll_freq' => 30,
      'subscribers' => ["root@localhost", "[email protected]"],
      'mmonit_host' => "http://user:[email protected]:8080/collector",
      'listen_allow' => ["localhost","mmonit.foo.net", "@users read-only"],
      }
    }
  }
)

LWRP

Examples of the LWRP resource:

SSHD

monit_check 'sshd' do
  check_id  "/var/run/sshd.pid"
  group     "system"
  start     "service ssh start"
  stop      "service ssh stop"
  tests [
    {
      'condition' => "failed port 22 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     "service postfix start"
  stop      "service 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     "service nginx start"
  stop      "service nginx stop"
  tests [
    {
      'condition' => "failed port 80 proto http",
      '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     "service memcached start"
  stop      "service 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     "service redis-server start"
  stop      "service 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     "service tomcat6 start"
  stop      "service 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     "service mongodb start"
  stop      "service mongodb stop"
  tests [
    {
      'condition' => "failed port #{node.mongodb.port} proto http for 2 cycles",
      'action' => "restart"
    },
    {
      'condition' => "if 3 restarts within 10 cycles",
      'action' => "timeout"
    },
  ]
end

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

LWRP Attributes

TODO