From: Alex Balashov <[EMAIL PROTECTED]>
Date: Wed, 11 Apr 2007 20:17:37 -0400 (EDT)
On Wed, 11 Apr 2007, Forrest Beck said something to this effect:
1) Using hearbeat and drbd to monitor the servers. When the primary
fails the backup will assign itself the virtual ip used between the two,
and then mount the drbd disk which has the asterisk configs and voicemail.
The biggest con to this is hearbeat just monitors a ping response either
over IP or a COM port. So if the asterisk service dies, heartbeat will
not fail over. Although I think there are work arounds for this. The
newest version is suppose to have support for monitoring a TCP port as
well....
This seems like a good approach, if you've got any stability and/or
filesystem-related quirks ironed out -- I've heard of some.
I don't know much about heartbeat, but I don't imagine it'd be hard to
hack in a SIP polling event either internally or externally.
You are right. It shouldn't be hard to just require the primary server to
register with the backup, monitor this registration from backup; when
Asterisk on primary fails, run a script to request primary to shutdown and
take over.
Yuan Liu
You could use SIP Swiss Army Knife (sipsak) or some other SIP testing
tool to send a periodic OPTIONS ping to the SIP service and trigger a
protection switch to the secondary server if it's down. Even if you can't
hack this into the heartbeat setup itself (can't it use external scripts
for monitoring?),
you can certainly do something like run it on the primary server and
if the SIP service dies, enact a firewall rule that drops ICMP responses
and thus artificially trigger a failure.
-- Alex
--
Alex Balashov <[EMAIL PROTECTED]>
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