Building Helix Server Cluster using LVS

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Introduction

RealNetworks' streaming service uses the following protocols:

  • PNM (TCP on port 7070, UDP from server -> player on ports 6970-7170)
  • RTSP (TCP on port 554, similar UDP as above, but often on multiple ports)
  • PNM was our original, but now mostly legacy, protocol used in our versions 1 through 5.
  • There's also a HTTP/TCP-only fallback mode which is (usually) on port 8080.

Architecture

Configuration Example

VS/NAT

VIP/EXT IP 192.168.9.244
GATEWAY IP 192.168.0.1
RS1 192.168.0.150
RS2 192.168.0.160


Run the follwing script on LB Server: 

ipvsadm -A -t 192.168.9.244:554  -s rr
ipvsadm -a -t 192.168.9.244:554  -r 192.168.0.150 -m
ipvsadm -a -t 192.168.9.244:554  -r 192.168.0.160 -m

Run 

realplay rtsp://192.168.9.244/test.rm

for a test.


VS/DR

VIP/eth0:0 192.168.9.200/24
LB/eth0 192.168.9.244
RS1 192.168.9.150 with lo0:0 192.168.9.244/32 noarp
RS2 192.168.9.160 with lo0:0 192.168.9.244/32 noarp

Run the follwing script on LB Server: 

ipvsadm -C
ipvsadm -A -t 192.168.9.200:554  -s rr
ipvsadm -a -t 192.168.9.200:554  -r 192.168.9.150 -g
ipvsadm -a -t 192.168.9.200:554  -r 192.168.9.160 -g

Run 

realplay rtsp://192.168.9.200/test.rm

for a test.

Conclusion

References


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