Miguel,
you may want to consider parsing the XML for all your clusters
on your server (by connecting to localhost oprt 8651).
This perl for example prints hosts that are down:
------------------------------------------------------------
#!/usr/bin/perl
open (FD, "nc localhost 8651 |") or die "netcat";
while (<FD>) {
($cluster) = / NAME="([^"]*)" / if (/^<CLUSTER NAME/);
$host="";
($host,$TN,$TMAX) = / NAME="([^"]*)" .*TN="([^"]*)".*TMAX="([^"]*)"/ if
(/^<HOST NAME/);
$cluster =~ s/ /-/g;
$clusters{$host} .= "$cluster ";
if (defined $TN{$host}) {
# Seen this host before - that's not right.
print "$host duplicate in XML. $clusters{$host} TN=$TN
TN=$TN{$host}\n";
}
if ($host) {
if ($TN > 10*$TMAX) {
printf("$host ($cluster) has not reported for %.1f
hours (TN=$TN TMAX=$TMAX)\n", $TN/(60*60));
$dead{$host}++;
}
}
}
foreach $host (sort keys %dead) {
print "$host in clusters $clusters{$host}\n" if $clusters{$host} =~ /.
./;
}
---------------------------------------------------------------
It is crude, but OK for the purpose. As all metrics from all servers flow out
as well, you could log or trigger an event with other criteria.
But remember that ganglia is not an alerting tool.
regards,
Richard
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of José Miguel
Pereira Tavares
Sent: 24 April 2006 16:32
To: ganglia-developers@lists.sourceforge.net
Subject: [Ganglia-developers] Trigger on defined conditions
Hi all!
I'm trying to find out if there is tool already developed that would
trigger when a precondition is achieved for example is a host is dead
then send a SMS to the system administrator.
I found on the ganglia-general mailing list a thread started by Leif
Nixon about this http://sourceforge.net/mailarchive/message.php?msg_id=2212186
I would like to avoid the installing nagios (keep it simple) if
possible, and from the choices given in
http://sourceforge.net/mailarchive/message.php?msg_id=2214585
by Steven Wagner, I think that creating a small application (option #3)
would be the fastest to develop and probably the most powerfull way of
doing this (using a scripting language such as python or pearl).
So has any work been done on this subject?
Thanks in advance for any information,
Miguel Tavares
--
"Until they become conscious they will never rebel,
and until after they have rebelled they cannot become conscious."
- George Orwell's 1984 -
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