On 12/13/2006 09:40:03 AM, Sylwester S. Biernacki wrote:
On Wednesday, December 13, 2006, at 15:59:02, Karl O. Pinc wrote:
> OpenBSD has ifstated, which is pretty simple to configure
> state engine.
it's true, but it's unusable here - if machine get 100% cpu load it
won't put down their interface.
ifstatd will run scripts. You'd have to
write various scripts on the load balancer
to monitor various aspects of the webservers.
And various scripts to fiddle with the load balancing
as a result. The only thing ifstatd would do "automatically"
is detect if one of the load balancer's interfaces went down
for whatever reason. That _is_ something that
you'd want to do to be through. You could use
snmp or roll your own for whatever
monitoring plugin scripts you'd need. All
ifstatd provides is a basic control
framework. This is an advantage because the state engine
approach makes things nice and modular.
The only limitation is that ifstatd uses polling
for everything but the interface detection.
YMMV.
Karl <[EMAIL PROTECTED]>
Free Software: "You don't pay back, you pay forward."
-- Robert A. Heinlein
