FitterHappier

FitterHappier is a Rails plug-in that provides actions for monitoring site and/or database availability. FitterHappier's monitoring controller disables unnecessary Rails features, like sessions, layouts, and logging, for lightning-fast monitoring URIs.

FitterHappier provides three monitoring URIs

% curl localhost:3000/fitter_happier
FitterHappier Site Check Passed

% curl localhost:3000/fitter_happier/site_check
FitterHappier Site Check Passed @ Wed, 17 Dec 2008 14:27:47 -0800

% curl localhost:3000/fitter_happier/site_and_database_check
FitterHappier Site and Database Check Passed @ Wed, 17 Dec 2008 14:27:57 -0800
Schema Version: 20081217141904

Installation

% cd vendor/plugins
% git clone git://github.com/atmos/fitter_happier.git

Uptime Monitoring

See EngineYard's support guide on uptime monitoring for your rails application

Monit

You can do simple checks with monit like this:

if failed host 127.0.0.1 port 5000
  protocol HTTP request /fitter_happier with checksum 15b8a1ee66d740fbfc00297684bb5430 then restart

Keepalived/LVS

You can also do this in a keepalived/LVS setup:

virtual_server 169.254.y.z 80 {
  delay_loop 15
  lb_algo lc
  lb_kind NAT
  nat_mask 255.255.255.0
  persistence_timeout 0
  protocol TCP
  sorry_server 127.0.0.1 80
  virtualhost www.myfacetube.com
  real_server 10.0.1.34 80 {
    weight 1
    HTTP_GET {
      url {
        path /fitter_happier
        status_code 200
      }
      connect_port 80
      connect_timeout 5
      nb_get_retry 20
      delay_before_retry 2
    }
  }
  real_server 10.0.1.35 80 {
    weight 1
    HTTP_GET {
      url {
        path /fitter_happier
        status_code 200
      }
      connect_port 80
      connect_timeout 5
      nb_get_retry 20
      delay_before_retry 2
    }
  }
}

Copyright (c) 2008 atmos, released under the MIT license