Re: cron problem

On Tue, Jun 07, 2005 at 08:33:35AM -0700, Spruce Weber wrote:
> The python script executed by cron to make sure skunkweb is running
> stopped working after I was moved from one server to another.
> 
> The script is called restartSkunkWebIfNeeded.py, from
> python-hosting.com, and it works when executed from my bash login.
> 
> In my config I noticed a sys.path.append referring to a non-existant
> "sitelibs" directory directly under my skunkweb installation directory.
> Could that be a problem?

No.  A non-existant directory on sys.path doesn't do any harm.
> 
> The path to my skunkweb installation and document root directories has
> not changed on the new server.
> 
> 
> restartSkunkWebIfNeeded.py:
> 
> #!/usr/local/bin/python2.1
> 
> # Check if SkunkWeb is running and restart it if it isn't
> 
> import os,sys
> skunkHome=os.path.dirname(sys.argv[0])
> 
> running=0
> try:
>         f=open(skunkHome+'/var/run/sw.pid')
>         pid=f.readline()
>         f.close()
>         res=os.popen('ps -aux | grep %s'%pid).readlines()
>         for r in res:
>                 if r.find('grep')==-1: running=1
> 
> except IOError: pass
> 
> if not running:
>         os.system(skunkHome+"/bin/swmgr start")
> 

Well, without knowing what actually fails I can't say.  I'd run this
by Remi.  I suggest adding better error reporting to the script so you
can tell what failed.  

Once skunkweb is up, it is really unlikely that it will go down unless
there is a reboot.  I have never seen the papa process crash.  But
python-hosting machines do seem to reboot from time to time, so you
want something to make sure it comes up.

You could also use a simpler cron just to deal with reboots:

  #! /bin/bash
  PID=/path/to/pid
  SWMGR=/path/to/swmgr
  
  [ ! -f $PID ] && $SWMGR start

Very primitive, but if it dies you'll know why.

Cheers,

js

-- 
Jacob Smullyan

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