[Linux-cluster] ipvs/ipvsadm

[Brett Cave]

on the real hosts (i.e. on 192.168.1.246), add an interface lo:0 (e.g.
rh in /etc/sysconfig/network-scripts/ifcfg-lo:0), add the HA ip's:

DEVICE=lo:0
IPADDR=192.168.1.240
MASK=255.255.255.255
ONBOOT=yes


You should also configure the kernel for arp requests, as follows
(either in /etc/sysctl.conf per persistent or via /proc)
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.eth0.arp_announce = 2




On Tue, May 19, 2009 at 10:45 AM, Sam Wun <swun2010 at gmail.com> wrote:
> Hi,
>
> I used the following commands setup a loadbalancer, however, it doesn't work.
>
> ipvsadm -A -t 192.168.1.240:ssh -s wlc -p
> ipvsadm -a -t 192.168.1.240:ssh -r 192.168.1.246 -i -w 3
>
> Here is the IP configuration:
> eth0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        options=8<VLAN_MTU>
>        ether 00:13:20:65:ad:bd
>        inet 192.168.1.248 netmask 0xffffff00 broadcast 192.168.1.255
>        inet 192.168.1.240 netmask 0xffffff00 broadcast 192.168.1.255
>        media: Ethernet autoselect (100baseTX <full-duplex>)
>        status: active
>
> If I remove the ipvsadm setup with "ipvsadm -C", ssh into
> 192.168.1.240 works for 192.168.1.240 host.
>
> With the above ipvadm rules in-placed,
> I can't ssh thru 192.168.1.240 and ipvsadm shown:
> # ipvsadm
> IP Virtual Server version 1.0.10 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
>  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
> TCP  192.168.1.240:ssh wlc persistent 360
>  -> 192.168.1.246:ssh            Tunnel  3      0          1
>
> What is the correct steps to setup ipvs and use ipvsadm?
>
> Your help is very much appreciated.
> Thanks
>
> --
> Linux-cluster mailing list
> Linux-cluster at redhat.com
> https://www.redhat.com/mailman/listinfo/linux-cluster
>