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Dear all,
I recently switched from LVS-NAT to LVS-DR and thus needed to solve the ARP
issue. I've compiled RedHat's 2.4.9 kernel with Julian's hidden patch, it
works fine.
But when I try a very specific setup, willing to use a node both as a
realserver and a backup director, here comes the problem :(
Actually, I have eth0:2 being the VIP, because at this point,
"backup-and-node" is the director. But when it's not, I still need VIP to be
setup on lo:1 to use "backup-and-node" as a realserver.
I end up with the following config :
[root@backup-and-node root]# cat /proc/sys/net/ipv4/conf/all/hidden
1
[root@backup-and-node root]# cat /proc/sys/net/ipv4/conf/lo/hidden
1
[root@backup-and-node root]# cat /proc/sys/net/ipv4/conf/eth0/hidden
0
[root@backup-and-node root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:40:05:5C:C2:04
inet addr:172.22.48.208 Bcast:172.22.63.255 Mask:255.255.240.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
eth0:2 Link encap:Ethernet HWaddr 00:40:05:5C:C2:04
inet addr:172.22.48.212 Bcast:172.22.63.255 Mask:255.255.240.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
lo:1 Link encap:Local Loopback
inet addr:172.22.48.212 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
The problem is that when VIP is setup on both lo:1 and eth0:2,
"backup-and-node" will not answer *any* ARP request for VIP, whereas it
should via eth0 (as far as I understand the purpose of the hidden feature).
Is this a bug or something I haven't understood ? Has anybody already
experienced that ?
TIA
--
Sébastien Bonnet
Ingénieur d'exploitation
Centre de contacts - Experian France
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