I've been playing replacing pound http://www.apsis.ch/pound/ with
mod_proxy_balancer (mpb), and I've run into a few issues that I
thought I'd share here, maybe confirm if I understood things correctly.
1) mpb logs when backend servers can't be contacted, but not when
they are available again
It's important to be able to see when a backend server dies and when
it's available again.
I was hoping for something that could be easily matched against, e.g.:
backend B alive; taking online [info]
backend B died; taking offline and moving clients B2 [error]
backend B still dead [warning] -- regular check
backend B has come alive again, taking online [error] -- error recovery
2) mpb doesn't warn/ log when switching backend server when
stickysession=on
It's important to know when this happens as it'll probably mean some
user lost his session.
Something like:
backend B died; taking offline and moving clients to B2; waited S
seconds because stickysessions was set [error] -- maybe even more
serious?
I've been running with loglevel=debug, so I hope I haven't missed
messages like the above amongst all the other messages.
Rgds,
Bjorn
