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-   -   Problem setting up LVS (load-balancer, linux virtual server) in Xen Virtual Machine (http://www.howtoforge.com/forums/showthread.php?t=7985)

cifroes 6th November 2006 21:32

Problem setting up LVS (load-balancer, linux virtual server) in Xen Virtual Machine
 
Hi all,

I'm trying to setup 3 virtual machines, 1 with LVS (Linux Virtual Server) load-balancing and 2 with Tomcat+Axis (webserver and stuff).

I'm using openSUSE 10.1 (xen 3.0.2) in all VMs and Dom0. rcSuseFirewall is stopped, iptables -l report everything "accept"'ing.

Here's my IP configuration:
http://pwp.netcabo.pt/pformoso/network.gif

You can see there are 3VMs running.


In the LB virtual machine I configure Linux Virtual Server (ipvsadm):
ipvsadm -A -t 192.168.200.180:8080 -s rr
ipvsadm -a -t 192.168.200.180:8080 -r 192.168.200.185:8080 -m
ipvsadm -a -t 192.168.200.180:8080 -r 192.168.200.190:8080 -m

I also set ip_forward:
echo "1" > /proc/sys/net/ipv4/ip_forward


Then, in dom0 I try my LVS:
lynx http://192.168.200.180:8080
but I only get "making http connection to xxxx..."


Tomcat logs in both VMs don't report the connection.
TCP sniffer in VM10/20 reports:
Capturing on eth0
1 0.000000 192.168.200.150 -> 192.168.200.185 TCP 44000 > http-alt [SYN] Seq=0 Ack=0 Win=5840 Len=0 MSS=1460 TSV=19301554 TSER=0 WS=2
2 0.009607 192.168.200.185 -> 192.168.200.150 TCP http-alt > 44000 [SYN, ACK] Seq=0 Ack=1 Win=5792 Len=0 MSS=1460 TSV=19273803 TSER=19301554 WS=2
3 0.009658 192.168.200.150 -> 192.168.200.185 TCP 44000 > http-alt [RST] Seq=1 Ack=4283853535 Win=0 Len=0


TCP sniffer in LB reports:
1 0.000000 192.168.200.150 -> 192.168.200.180 TCP 44000 > http-alt [SYN] Seq=0 Ack=0 Win=5840 Len=0 MSS=1460 TSV=19301554 TSER=0 WS=2
2 0.009344 192.168.200.150 -> 192.168.200.185 TCP 44000 > http-alt [SYN] Seq=0 Ack=0 Win=5840 Len=0 MSS=1460 TSV=19301554 TSER=0 WS=2



Any ideas why this doesn't work? How should I do it? Any tutorial/howto help is appreciated.


Thanks in advance,
--cifroes

falko 7th November 2006 17:55

Did you have a look at this tutorial? http://www.howtoforge.com/high_avail...apache_cluster


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