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Hello,
I am having an odd issue with a DR setup. When the director is running,
and the VIP is on eth0:0, I can't reach the VIP over TCP. I know it's to
do with LVS, because as soon as I swap the director by failing the
heartbeat, the new director (app1) then fails in the same way..
and the failing one (app0) then starts working!
a diagram:
app0 (ipvsadm 1:1.25.clean-1)
eth0:0 94.228.67.2/32
eth0 94.228.67.7/28
app1 (heartbeat backup)
lo:0 94.228.67.2/32
eth0 94.228.67.8/28
app2 (plain old server)
lo:0 94.228.67.2/32
eth0 94.228.67.9/28
and here is the problem:
20:03 app0:~% sudo /etc/init.d/nginx restart
Restarting nginx: nginx.
20:04 app0:~% telnet 94.228.67.2 80
Trying 94.228.67.2...Connected to 94.228.67.2.
Escape character is '^]'.
^]
telnet> Connection closed.
20:04 app0:~% telnet 94.228.67.2 80
Trying 94.228.67.2...
telnet: Unable to connect to remote host: Connection timed out
20:04 app0:~% sudo ethtool -k eth0
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: off
tcp-segmentation-offload: off
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: off
large-receive-offload: off
20:04 app0:~% sudo /etc/init.d/nginx restart
Restarting nginx: nginx.
20:05 app0:~% telnet 94.228.67.2 80
Trying 94.228.67.2...
telnet: Unable to connect to remote host: Connection timed out
20:05 app0:~% sudo sysctl -p
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
20:07 app0:~% uname -a
Linux app0 2.6.32-25-server #45-Ubuntu SMP Sat Oct 16 20:06:58
UTC 2010 x86_64 GNU/Linux
Strangely though, ICMP works throughout the TCP failing. I never lose a
single ping.
These NICs are Broadcom NetXtreme II BCM5709's.
I have successfully setup this configuration on Debian lenny,
2.6.26-2-amd64, so I know it works.. I'm just hoping someone has seen
this before and can point me in the right direction.
Regards,
C.
--
020 7729 4797
http://playlouder.com/
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