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I have used LVS on the 2.4 kernel tree for quite some time with keepalived,
the product has worked great. Thank you to the LVS team!
I recently switched to new 64bit xeons with kernel 2.6.17.6 and I am now
having some strange issues with LVS.
Currently I am getting flooded in /var/log/messages with kernel: IPVS:
ip_vs_wrr_schedule(): no available servers.
However, running ipvsadm reports I have all of my real servers loaded into
IPVS.
I have 48 entries in the ipvsadm table, I am pasting one of them here:
TCP imap.mydomain.net:imap wrr persistent 300
-> localhost.localdomain:imap Local 0 0 0
-> 10.0.5.56:imap Route 0 0 0
IPVS is also not functioning as you can imagine since it seems to think it
has no real servers.
I have seem some minor changes between 2.6.17.6 and 2.6.19.2 but nothing I
can see that relates to any bugfixes, so by upgrading I do not think it
would solve this problem. Have I overlooked something?
I have tried shutting off the real servers and let keepalived fail out of
every service which results in the real servers being removed from ipvsadm.
...I have then re-activated the real servers which adds the real servers
back in correctly to ipvsadm. This did not fix the problem but keepalived
appeared to be operating correctly. I have fixed the problem by killing
keepalived and starting it back up. Perhaps this unloads and loads the ipvs
kernel module?
I am also still working on the steps to reproducing this problem.
Has anyone seen anything like this?
Best
Bryan Heitman
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