[Xymon] xymond_filestore - appending to files?

[John Horne]

On Fri, 2012-04-20 at 22:51 +0200, Henrik Størner wrote:
> Hi John,
> 
> > I would like to use the 'xymond_filestore' command to append to
> > files when receiving information from a 'data' channel.
> 
> [snip description of how it works]
> 

> Going back to your original request: Having the data from "data" 
> messages appended to a file. Like the other Xymon channels, information 
> sent via the "data" channel is easily available to any server-side 
> module you can think of. Just run a task out of tasks.cfg that picks up 
> the data-channel messages:
> 
>     xymond_channel --channel=data mymodule.pl
> 
> and then write your "mymodule.pl" program to do what you like.
>
Given that what I want to do is store the data, and xymond_filestore
stores data, I used that as a starting point rather than re-inventing
the wheel :-)

>  It doesn't have to be Perl; feel free to use whatever scripting tool you 
> fancy. I just used Perl as an example, because there is a little Perl 
> program included with Xymon that shows how to do that - look at the 
> xymond/xymond_rootlogin.pl program.
>
Yes, I noticed the 'xymond_rootlogin.pl' program. Thanks, it was
helpful.

>  The header-line of a "data" message is different from the "client"
> header that rootlogin.pl handles, but not very much so you should be
> able to work it out. You can see the messages by running
> 
>     xymoncmd xymond_channel --channel=data cat
> 
Interesting. I used the '--debug' options of xymond_channel and
xymond_filestore to dump out to the log files what they were doing. It
did show what was being sent/received, so again it was helpful in seeing
what was going on.

> 
> And feel free to use xymond_filestore as a starting point for writing 
> your own data-handling program :-)
> 
I suspect that will be the way I go, probably coupled with the 'usermsg'
channel so as to avoid problems with other programs using the other
channels.

Many thanks for the explanations.




John.

-- 
John Horne, Plymouth University, UK
Tel: +44 (0)1752 587287    Fax: +44 (0)1752 587001