A quick update:
I was able to find the check_process_status method and all it does is read
the pid from the pid file then do a kill -0 on the pid so this should work
but it doesn't for some reason. Perhaps I mis a config step where Ambari is
not calling the our python script somehow. But Ambari is calling the script
to start our app so any suggestion is appreciated.
One more question I setup the customer script in
/var/lib/ambari-server/resources/stacks/HDP/2.2/... but when ambari starts
it complains that it can't find my script at
/var/lib/ambari-agent/cache/stacks/HDP/2.2/services/... so I manually
created the directory that ambari is looking for and copied the script
there and ambari was able to start our app. Anyone knows how to set a
custom service up so I don't have to manually copy my script to the
/var/lib/ambari-agent/cache/... directory ??
Many thanks!
the portion of the check_process_status code I was talking about :
try:
pid = int(sudo.read_file(pid_file))
except:
Logger.debug("Pid file {0} does not exist".format(pid_file))
raise ComponentIsNotRunning()
try:
# Kill will not actually kill the process
# From the doc:
# If sig is 0, then no signal is sent, but error checking is still
# performed; this can be used to check for the existence of a
# process ID or process group ID.
os.kill(pid, 0)
except OSError:
Logger.debug("Process with pid {0} is not running. Stale pid file"
" at {1}".format(pid, pid_file))
raise ComponentIsNotRunning()
On Fri, May 22, 2015 at 10:35 AM, Tim To <[email protected]> wrote:
> Hi all,
> I am using ambari 2.0 and hadoop 2.4. We have a customer process and I've
> been trying to set up monitoring and alert for it base on what I leanred
> from two populate sites:
> The offiical ambari one:
> https://cwiki.apache.org/confluence/display/AMBARI/Ambari
> and another one that has more detailed explanations:
>
> http://mozartanalytics.com/how-to-create-a-software-stack-for-ambari/?preview=true
>
> So far I was able to set it up and I can deploy our custom service and
> have ambari starts it for me (so I think the stop will work too). However
> check status doesn't work. Based on comments from the second site I'm
> trying to pass a pid file location to check_process_status() and magic
> should happen and Ambari would be able to tell whether this process is
> working or not.
> here's my python function for status:
>
> def status(self, env):
> print 'Status of Phemi Central';
> check_process_status('/home/testuser/appName/logs/pid-8888')
>
> I manaully checked the file after ambari started our app and it does
> contain the correct pid for the process but ambari still think the app is
> "stopped".
>
> - Any pointer as to how check status works and how I am suppose to setup
> up is apprecaited.
> - Any more detailed documentation to setup monitoring and alert in
> addition to the avoe mentioend website would be greatly helpful (even a
> confirmation that there is none would save me searching for more :) )
> - I also checked out the latest ambari code from github but have a hard
> time locatng the where check status is done so any help with looking for
> the code would also be helpful.
>
> Thanks in advance everyone!!
>
>
> --
> *Tim To*
> Software Engineer
> *PHEMI Health Systems*
> 180-887 Great Northern Way
> Vancouver, BC V5T 4T5
> website <http://www.phemi.com/> twitter <https://twitter.com/PHEMISystems>
> Linkedin
> <http://www.linkedin.com/company/3561810?trk=tyah&trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>
>
--
*Tim To*
Software Engineer
*PHEMI Health Systems*
180-887 Great Northern Way
Vancouver, BC V5T 4T5
website <http://www.phemi.com/> twitter <https://twitter.com/PHEMISystems>
Linkedin
<http://www.linkedin.com/company/3561810?trk=tyah&trkInfo=tarId%3A1403279580554%2Ctas%3Aphemi%20hea%2Cidx%3A1-1-1>
