Hi. I'm trying to configure God's flapping condition to avoid infinite
restarts when a problem happens, but I can't seem to make it work. It's
never detecting the flapping state.
That's my God configuration:
God.watch do |w|
w.name = "myapp-unicorn"
w.group = "myapp"
w.dir = RAILS_ROOT
w.env = { 'RAILS_ENV' => environment }
w.start = "bundle exec unicorn -c config/unicorn.rb -E #{environment} -D"
w.stop = "kill -s QUIT `cat #{PID_FILE}`"
w.restart = "kill -s USR2 `cat #{PID_FILE}`"
w.pid_file = PID_FILE
w.behavior :clean_pid_file
w.interval = 30.seconds
w.start_if do |start|
start.condition(:process_running) do |c|
c.interval = 15.seconds
c.running = false
#c.notify = 'developers'
end
end
w.restart_if do |restart|
restart.condition(:memory_usage) do |c|
c.above = 150.megabytes
c.times = [3, 5] # 3 out of 5 intervals
#c.notify = 'developers'
end
restart.condition(:cpu_usage) do |c|
c.above = 50.percent
c.times = 5
#c.notify = 'developers'
end
end
w.lifecycle do |on|
on.condition(:flapping) do |c|
c.to_state = [:start, :restart]
c.times = 5
c.within = 5.minute
c.transition = :unmonitored
c.retry_in = 10.minutes
c.retry_times = 5
c.retry_within = 2.hours
#c.notify = 'developers'
end
end
end
So I tried to change bundle exec to budle exec in the start configuration
above to cause an error. This is what happens when I start god:
$ RAILS_ENV=staging bundle exec god -c config/god.rb -D
I [2013-05-07 12:16:19] INFO: Loading config/god.rb
I [2013-05-07 12:16:19] INFO: Syslog enabled.
I [2013-05-07 12:16:19] INFO: Using pid file directory:
/home/myapp/.god/pids
I [2013-05-07 12:16:19] INFO: Started on drbunix:///tmp/god.17165.sock
I [2013-05-07 12:16:19] INFO: myapp-unicorn move 'unmonitored' to 'up'
I [2013-05-07 12:16:19] INFO: myapp-unicorn moved 'unmonitored' to 'up'
I [2013-05-07 12:16:19] INFO: myapp-unicorn [trigger] process is not
running (ProcessRunning)
I [2013-05-07 12:16:19] INFO: myapp-unicorn move 'up' to 'start'
I [2013-05-07 12:16:19] INFO: myapp-unicorn before_start: no pid file to
delete (CleanPidFile)
I [2013-05-07 12:16:19] INFO: myapp-unicorn start: budle exec unicorn -c
config/unicorn.rb -E staging -D
W [2013-05-07 12:16:19] WARN: myapp-unicorn start command exited with
non-zero code = 1
I [2013-05-07 12:16:19] INFO: myapp-unicorn moved 'up' to 'up'
I [2013-05-07 12:16:19] INFO: myapp-unicorn [trigger] process is not
running (ProcessRunning)
I [2013-05-07 12:16:19] INFO: myapp-unicorn move 'up' to 'start'
I [2013-05-07 12:16:19] INFO: myapp-unicorn before_start: no pid file to
delete (CleanPidFile)
I [2013-05-07 12:16:19] INFO: myapp-unicorn start: budle exec unicorn -c
config/unicorn.rb -E staging -D
W [2013-05-07 12:16:19] WARN: myapp-unicorn start command exited with
non-zero code = 1
I [2013-05-07 12:16:19] INFO: myapp-unicorn moved 'up' to 'up'
...
And it keeps doing that, trying to restart several times per second. I
stopped it after a few seconds (it tried at least 50 times). I expected the
flapping condition to stop it after 5 tries. What I am understanding or
doing wrong?
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