[Xymon] html_mail1.2 is using simple hostname instead of FQDN in the link in the message

[David Baldwin]

Christian,
>
> Hello out there,
>
>  
>
> Perhaps there’s anybody else using alerts:html_mail1.2 which is
> available from http://xymonton.org/alerts:html_mail1.2
>
>  
>
I do! I wrote the latest version, some updates still pending.
>
> I’ve set it up and i’ve done some changes to the way it sends the
> subject and the body. All of this is working fine.
>
> There’s one thing that makes me wonder and I’ve tried a bit for me,
> but I’m concerned why I cannot get this to work.
>
> The body of the eMails coming from the perl script contains a link to
> the affected host, for example:
>
>  
>
> http://XYMONHOST/xymon-cgi/bb-hostsvc.sh?HOST=testhost&SERVICE=http
> <http://XYMONHOST/xymon-cgi/bb-hostsvc.sh?HOST=testhost&SERVICE=http>
>
>  
>
> But I need to have the link as follows:
>
>  
>
> http://XYMONHOST.FULL-QUALIFIED-DOMAIN/xymon-cgi/bb-hostsvc.sh?HOST=testhost&SERVICE=http
> <http://XYMONHOST.FULL-QUALIFIED-DOMAIN/xymon-cgi/bb-hostsvc.sh?HOST=testhost&SERVICE=http>
>
>  
>
If you look at the perl code, these URLs are constructed using exactly
what xymon has as in its config files.
>
>  
>
> This is due to the fact that we do monitoring for different customers
> having their Xymon servers with different domain names.
>
>  
>
> For example, we have a Xymon server xymonA.domainA.org and another one
> called xymonB.domainB.org.
>
>  
>
> Therefore I need the fully qualified hostname in the link.
>
>  
>
> While reviewing the perl code of the script I recognized a section
> “Retrieve the data from the environment variables”.
>
> Within there I inserted a line
>
>  
>
> $BBSERVERHOSTNAME = $ENV{‘BBSERVERHOSTNAME’} || “”;
>
>  
>
> The syntax is the same as for the other variables. Then I changed the
> line containing the subject for the eMail to contain this variable
> instead of $BBSERVERWWWNAME.
>
> As last step I changed the setting for the XYMONSERVERHOSTNAME (which
> is also set as BBSERVERHOSTNAME) in xymonserver.cfg.
>
>  
>
> After restarting the xymon services and the webserver I’m still
> getting eMails containing the link WITHOUT having the fully qualified
> hostname.
>
>  
>
> I’m NOT getting entries in /var/log/xymon/alert.log saying that the
> variable $BBSERVERHOSTNAME is uninitialized.
>
> When commenting out the line
>
> $BBSERVERHOSTNAME = $ENV{‘BBSERVERHOSTNAME’} || “”;
>
> in the perl script, then I get this message.
>
>  
>
> For me this means, that I might have done the most things the right
> way; didn’t i? Anybody out there having an idea?
>
>  
>
> Sorry if my english isn’t at 100%....
>
>  
>
The $BBSERVERWWWNAME variable is what is used for the hostname in the
URL section.

If you have separate servers I suggest 2 options:
1) change the BBSERVERWWWNAME variable in the server.cfg file on each server
2) hack the perl code to hard-code the BBSERVERWWWNAME variable on each
server.

The easiest way to test the script is to set up a special alert rule for
a testing host/service combination in alerts.cfg - e.g.

HOST=testhost SERVICE=testname
    SCRIPT /path/to/html_mail.pl testalias COLOR=red

Then send red status updates using the xymon command - e.g. (on the
xymon server)

xymon localhost "status testhost.testname red html_mail test"

Send a green status to reset and then repeat to trigger the script again.
This should not require restarting services at all.

David.

-- 
David Baldwin - Senior Systems Administrator (Datacentres + Networks)
Information and Communication Technology Services
Australian Sports Commission          http://ausport.gov.au
Tel 02 62147830 Fax 02 62141830       PO Box 176 Belconnen ACT 2616
david.baldwin at ausport.gov.au          Leverrier Street Bruce ACT 2617


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