|
On Sat 03 Sep 2005 11:52:41 BST , Julian Anastasov <ja@xxxxxx> wrote:
As reported from some users, the ip_nat_ftp module causes some
problems with other virtual services.
<snip detailed explanation and patches>
I performed simple tests, so please test these patches,
for example, persistence+ip_nat_ftp, the ip_vs_sync code is changed
too. If there is a better solution please speak before including them
in next kernel releases. I'm expecting confirmation from people
with the problem that reply packets were not translated from IPVS.
I have ported these patches cleanly into a 2.6.8 kernel tree on my
backup director and rebuilt the kernel - they applied cleanly, and the
kernel built cleanly (this is an FC1 derived tree).
The director booted up clean too.
I then fired up keepalived in BACKUP mode, and it did as expected. I
then stopped keepalived on the MASTER director and it failed over to
the BACKUP as expected.
I rebooted the MASTER to get the new kernel on there and brought it up
without keepalived running to prevent it automatically taking over.
For the next 20 or so minutes I ran on BACKUP alone, and users reported
no session "flaps" from server to server (manifesting themselves
principally as being asked to login to their apps again).
When we were happy that nothing had actually broken, we fired up
keepalived on MASTER and failed back again. Persistence carried across,
so no sessions were dropped at all (certainly by the users we were
monitoring). This did NOT happen in the past, there was a 50/50 chance
that persistence would disappear on failover/failback.
After a further hour or so of monitoring, the users seem to be happy
that they are not losing session persistence now. I will monitor
further during the next 24 hours and see what comes up.
To summarise: works for me, so far :)
Graeme
|
