Difference between revisions of "Building Windows Media Service Cluster using LVS"

Revision as of 17:21, 13 July 2006

Introduction

Microsoft Windows Media Service uses uses two streaming media protocols to deliver content as a unicast stream to clients:

• Real Time Streaming Protocol (RTSP)
• Microsoft Media Server (MMS) protocol

Architecture

Configuration Example

In order for us to get this to work, we need to allow the following ports in:

• 80 tcp (ONLY NEEDED IF YOU ARE SERVING STREAMS THROUGH HTTP)
• 554 tcp/udp
• 1755 tcp/udp
• 1024-5000 udp

This can be done like so, replacing $EXT_IF and $EXT_IP with your appropriate interface and IP:

• iptables -A INPUT -i $EXT_IF -p tcp -s 0/0 -d $EXT_IP --dport 1755 -j ACCEPT
• iptables -A INPUT -i $EXT_IF -p tcp -s 0/0 -d $EXT_IP --dport 554 -j ACCEPT
• iptables -A INPUT -i $EXT_IF -p udp -s 0/0 -d $EXT_IP --dport 554 -j ACCEPT
• iptables -A INPUT -i $EXT_IF -p udp -s 0/0 -d $EXT_IP --dport 1024:5000 -j ACCEPT

(example: iptables -A INPUT -i eth0 -p tcp -s 0/0 -d 1.2.3.4 --dport 1755 -j ACCEPT)

Next, we need to take a group the packets by using the MANGLE table in iptables. To do that you would do the following, replacing $EXT_IF, $EXT_IP and $WMS_MARK with your appropriate interface, IP and mark that you would like to tag the packets with:

• iptables -t mangle -A PREROUTING -i $EXT_IF -p tcp -s 0/0 -d $EXT_IP --dport 554 -j MARK --set-mark $WMS_MARK
• iptables -t mangle -A PREROUTING -i $EXT_IF -p udp -s 0/0 -d $EXT_IP --dport 554 -j MARK --set-mark $WMS_MARK
• iptables -t mangle -A PREROUTING -i $EXT_IF -p tcp -s 0/0 -d $EXT_IP --dport 1755 -j MARK --set-mark $WMS_MARK
• iptables -t mangle -A PREROUTING -i $EXT_IF -p udp -s 0/0 -d $EXT_IP --dport 1755 -j MARK --set-mark $WMS_MARK
• iptables -t mangle -A PREROUTING -i $EXT_IF -p udp -s 0/0 -d $EXT_IP --dport 1024:5000 -j MARK --set-mark $WMS_MARK

(example: iptables -t mangle -A PREROUTING -i eth0 -p tcp -s 0/0 -d 1.2.3.4 --dport 554 -j MARK --set-mark WMSLVS1)

Next, we need to tell LVS to do the load balancing. This can be done by doing the following, replacing $WMS_MARK and $RSx_IP with the appropriate mark that you chose above and your real server IPs:

• ipvsadm -D -f $WMS_MARK
• ipvsadm -A -f $WMS_MARK -s rr -p 600
• ipvsadm -a -f $WMS_MARK -r $RS1_IP:0 -m
• ipvsadm -a -f $WMS_MARK -r $RS1_IP:0 -m

(example: ipvsadm -A -f WMSLVS1 -s rr -p 600)
(example: ipvsadm -a -f WMSLVS1 -r 10.10.10.1:0 -m)

Once you have completed these steps, you should have a working Windows Media Streaming Server LVS! Enjoy!

Conclusion

References

• http://archive.linuxvirtualserver.org/html/lvs-users/2004-03/msg00176.html
• Firewall Information for Windows Media Services 9 Series

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