examples/gravatar.god

   1 # run with:  god -c /path/to/gravatar.god
   2 #
   3 # This is the actual config file used to keep the mongrels of
   4 # gravatar.com running.
   5
   6 RAILS_ROOT = "/Users/tom/dev/gravatar2"
   7
   8 %w{8200 8201 8202}.each do |port|
   9   God.watch do |w|
  10     w.name = "gravatar2-mongrel-#{port}"
  11     w.interval = 30.seconds # default
  12     w.start = "mongrel_rails start -c #{RAILS_ROOT} -p #{port} \
  13       -P #{RAILS_ROOT}/log/mongrel.#{port}.pid  -d"
  14     w.stop = "mongrel_rails stop -P #{RAILS_ROOT}/log/mongrel.#{port}.pid"
  15     w.restart = "mongrel_rails restart -P #{RAILS_ROOT}/log/mongrel.#{port}.pid"
  16     w.start_grace = 10.seconds
  17     w.restart_grace = 10.seconds
  18     w.pid_file = File.join(RAILS_ROOT, "log/mongrel.#{port}.pid")
  19
  20     w.behavior(:clean_pid_file)
  21
  22     w.start_if do |start|
  23       start.condition(:process_running) do |c|
  24         c.interval = 5.seconds
  25         c.running = false
  26       end
  27     end
  28
  29     w.restart_if do |restart|
  30       restart.condition(:memory_usage) do |c|
  31         c.above = 150.megabytes
  32         c.times = [3, 5] # 3 out of 5 intervals
  33       end
  34
  35       restart.condition(:cpu_usage) do |c|
  36         c.above = 50.percent
  37         c.times = 5
  38       end
  39     end
  40
  41     # lifecycle
  42     w.lifecycle do |on|
  43       on.condition(:flapping) do |c|
  44         c.to_state = [:start, :restart]
  45         c.times = 5
  46         c.within = 5.minute
  47         c.transition = :unmonitored
  48         c.retry_in = 10.minutes
  49         c.retry_times = 5
  50         c.retry_within = 2.hours
  51       end
  52     end
  53   end
  54 end