On Wed, Aug 20, 2008 at 10:35:21AM -0400, Nicholas Guarracino wrote:
> On Tue, Aug 19, 2008 at 9:28 PM, Simon Horman <horms@xxxxxxxxxxxx> wrote:
> > If so, the key to persistence working is the persistence template.
> > It is an entry that goes into the connection table with 0 as the from-port
> > and acts as a parent entry for other connections from the same
> > host/netmask - I won't attempt to fail to explain that relationship
> > yet another time.
> > You should see these templates being synchronised to the backup
> > director like any other connection. And you should be able to verify
> > this using either ipvsadm -Lcn or cat /proc/net/ip_vs_conn
> > Can you verify that this is the case?
> > Could you look at the timeouts for the templates?
> Yes, the templates are being synchronized.
> On the director:
> TCP 00:51 NONE 126.96.36.199:0 10.204.54.170:443 10.204.54.165:443
> TCP 00:54 NONE 188.8.131.52:0 10.204.54.170:443 10.204.54.166:443
> On the backup director:
> TCP 02:51 NONE 184.108.40.206:0 10.204.54.170:443 10.204.54.165:443
> TCP 02:54 NONE 220.127.116.11:0 10.204.54.170:443 10.204.54.166:443
> > I suspect that the problem is that the problem is that when
> > templates are synchronised their timeout is not synchronised.
> > Instead, at the other end it is set to 3 minutes. So perhaps they
> > are timing out and disapearing premeturely?
> > I'm looking at the bottom of ip_vs_process_message() in
> > net/ipv4/ipvs/ip_vs_sync.c in 2.6.27-rc2
> > Actually, I think that this works a little differently in 2.6.18,
> > but the affect seems to be much the same according to a quick
> > test that I ran.
> > Clearly this is not ideal, and it would be nice to fix.
> > But does it explain your problem?
> I'm not sure. My timeout is only 1 minute but it does look like when
> the template gets synchronized to the backup director the timeout
> becomes 3 minutes. That would be the opposite situation from what you
> described though, wouldn't it?
Yes, I would imagine so.
I wonder if for some reason the templates on the backup aren't being used.