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servas!
yes. Server 1 is a physical server and should be the director.
and the realserver should be a virtual machine QEMU VM.
(an identical physical server #2 will run standby to take over when needed, but
is not running now, since i'm just testing the ldirector-daemon ..)
again i try to access from a laptop within the net (CIP 192.168.0.3) the VIP
192.168.0.40 via ssh.
tcpdump from the director (many times):
14:34:19.152325 IP krebslap.home.frosch.net.51996 > 192.168.0.40.ssh: S
574254289:574254289(0) win 5840 <mss 1460,sackOK,timestamp 68940097
0,nop,wscale 7>
tcpdump from the realserver (many times):
12:51:30.652828 IP 192.168.0.3.45387 > 192.168.0.40.ssh: S
3907198828:3907198828(0) win 5840 <mss 1460,sackOK,timestamp 69973461
0,nop,wscale 7>
hmmm, it seems that the request ist going through the director to the
realserver, but no information is going back?!?
then (after some more reading) i tried on the realserver:
ifconfig lo:1 192.168.0.40 up -> no success
ifconfig lo:1 down
ifconfig eth0:1 192.168.0.40 up -> seems to work !
do i understand correctly that i have to give the realserver also the VIP ?????
ciao
H.
> Hi
>
> On Thu, 10 Jul 2008, "Heinz A. Krebs" <heinz@xxxxxxxxx> wrote:
> > i'm trying to setup a load balancing system with 2 servers and with
> > qemu-kvm-engines running inside. tried it already some days (various
> > techniques), but could not succeed, so i'm asking for help, ...
>
> OK...
>
> > on Server 1:
> > -------------------
> > eth0 is bidged to br0, eth1 not used by now
> > br0 192.168.0.110
> > br0:1 192.168.5.110 (DIP)
> > br0:2 192.168.0.40 (VIP)
>
> Just to check - Server1 is the director, yes? Is this a VM, or the
> real hardware?
>
> > the server is running qemu-kvm, with a virtual network-card connected to
> > br0. the networkcard gets the address 192.168.5.115, with default
> > gateway 192.168.5.110. inside the virtual engine i'm running a
> > nameserver
>
> Again, to be clear - the "realserver" (in LVS terms) is a QEMU VM?
>
> > relevant part of my ldirector.cf:
> > virtual=192.168.0.40:53
> > real=192.168.5.115:53 masq
> > service=dns
> > scheduler=rr
> > protocol=tcp
> > checktype=on
> > and a similar entrie for ssh
>
> You'd be much better off just doing one service at a time. Since SSH
> responds with a banner (DNS does not) please consider getting your LVS
> up and running using SSH alone.
>
> > from the server i can:
> > ssh 192.168.5.115 -> connection o.k.
> > telnet 192.168.5.115 53 -> connection o.k.
>
> Which means that the bridge device is working OK, at least locally.
>
> > but from outside (CIP 192.168.0.5):
> > ssh 192.168.0.40 -> no route to host
> > telnet 192.168.0.40 53 -> connection refused
> > ping 192.168.0.40: ping is o.k.
>
> Is 192.168.0.5 a completely separate physical machine?
>
> > tcpdump 'tcp port 53' says:
> > 12:37:19.757766 IP 192.168.0.5.34186 > 192.168.0.40.domain: S
> > 3157355270:3157355270(0) win 5840 <mss 1460,sackOK,timestamp 150219440
> > 0,nop,wscale 6>
> > so it seems that the packages reaches the server, but is not forwarded
> > to the virtual machine ..
>
> Which machine - real or VM - was that taken from?
>
> Strip it back to SSH only, and try again. This time run a tcpdump on
> the director and the realserver (the QEMU VM) and see what you get.
> I'm fairly sure there's something basic going on here.
>
> Graeme
>
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