Re: [monit] Monit and BackgroundRB

[Martin Pala]

For security reasons monit purges the environment and only sets  
spartan PATH variable that contains /bin, /usr/bin, /sbin and /usr/ 
sbin (see monit FAQ - Q6: http://www.tildeslash.com/monit/doc/faq.php).
The start program is not executed in shell - the arguments are given  
to execv(), thus the following construct in your configuration won't  
work:

--8--
start program = "/usr/bin/env PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/ 
local/bin HOME=/home/ramon /usr/bin/ruby /home/ramon/app/current/ 
script/backgroundrb start"
--8--

You have several options:

1.) you can use absolute paths in your startup script or put the PATH  
setting to the beginning of the script.
2.) you can wrap the start command in shell like this:
start program = "/bin/bash -c '/usr/bin/env PATH=/bin:/usr/bin:/sbin:/ 
usr/sbin:/usr/local/bin HOME=/home/ramon /usr/bin/ruby /home/ramon/app/ 
current/script/backgroundrb start'"

Martin


On Sep 21, 2008, at 11:17 AM, Ramon Miguel M. Tayag wrote:

> Hi all!
>
> I'm new to this server administration, and I got myself Deploying
> Rails Apps by Prag Prog to help me out.  I've learned a great lot by
> trial and error and some pulling of hair.
>
> My problem now is I get inconsistent results.  This configuration (as
> far as I know), used to work. But...
>
> Now, I can't seem to find a way to debug what's wrong.  When I start
> backgroundrb via command line, it starts fine.  When I make monit do
> it, I get an "Execution failed".
>
> If I start it from the command line, and monit still has the
> backgroundrb "Execution failed" status but still monitoring it, the
> status becomes "running" (since I started it from command line)
> However, when I stop and start from monit, or simply restart, I get
> the execution failed again.
>
> Note: I start it with the exact same code (I copy and paste the
> command from my monit) except that I add "sudo" at the beginning.
>
> Why would it fail if I start from monit but work if I start from the
> command line?
>
> Here are my config scripts:
> http://pastie.org/276608
>
> Thanks, and hoping for a solution,
> --
> Ramon Tayag
>
>
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