|
frankly i never succeeded into configuring LVS to work with NAT, only with
DR, which in your case i think will work better as you have no router
between your machines and is more recomended. However it is weird that if
tcpdump runs then LVS starts to work, as it has nothing to do with it. Try
migrating to DR instead see how it goes, you can find plenty of tutorials on
google depending on your linux distro.
On Thu, Apr 8, 2010 at 1:54 PM, Vlad Dogaru <ddvlad@xxxxxxxxxx> wrote:
> Hello, everyone,
>
> I am just getting the hang of LVS and am using a virtual machine
> (OpenVZ-based) setup for this purpose. I have run into a very strage
> problem while testing: the client can only connect to a RS if tcpdump
> runs on the director.
>
> My setup involves 4 virtual machines, one simulating the client and 3
> real servers. The host node acts as a director.
>
> The three real servers are connected to a bridge, br0, in 10.0.0.0/8
> network. Thus, RIP=10.0.0.x. The client is in network 192.168.0.0/24,
> with CIP=192.168.0.50 and VIP=192.168.0.50. The host has a masquerade
> rule for the RIPs.
>
> Now, all the machines communicate properly, questions 1-3 from [1] are
> all right -- I'm not very savvy at reading tcpdump output, so I'm not
> sure about the fourth. Problem is, while testing, I've noticed that if I
> run a tcpdump, for instance
> tcpdump -i any -ln host 192.168.0.50
> on the director, wget just works, repeatedly (hence, on different real
> servers). Otherwise, if tcpdump is not running on the director, client
> receives 'Connection refused' on VIP. If tcpdump is running on a RS, I
> invariably get 'Connection refused' (I've tried multiple times, to
> account for scheduling.
>
> Here is the configuration on the director, though I suspect that, given
> the symptoms, I could not have messed it up.
>
> srisp-lab:~# ipvsadm
> IP Virtual Server version 1.2.1 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP srisp-lab.local:www rr
> -> realserver3:www Masq 1 0 0
> -> realserver2:www Masq 1 0 0
> -> realserver1:www Masq 1 0 0
>
> [1]
>
> http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-NAT.html#lvs_nat_julians_setup
>
>
> Has anyone encountered a similar issue? Am I somehow missing the obvious?
>
> Thanks in advance,
> Vlad
>
> _______________________________________________
> Please read the documentation before posting - it's available at:
> http://www.linuxvirtualserver.org/
>
> LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> or go to http://lists.graemef.net/mailman/listinfo/lvs-users
>
_______________________________________________
Please read the documentation before posting - it's available at:
http://www.linuxvirtualserver.org/
LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to http://lists.graemef.net/mailman/listinfo/lvs-users
|
