Difference between revisions of "Building Helix Server Cluster using LVS"
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[http://en.wikipedia.org/wiki/Helix_%28project%29 Helix] is an open source project started by Real Networks to provide audio and media service. | [http://en.wikipedia.org/wiki/Helix_%28project%29 Helix] is an open source project started by Real Networks to provide audio and media service. | ||
| − | A single Helix always has its limitation in performance. Server cluster can be used to scale up the performance of the whole Helix media system. | + | A single Helix server always has its limitation in performance. Server cluster can be used to scale up the performance of the whole Helix media system and provide redundancy. |
Helix streaming service uses the following protocols: | Helix streaming service uses the following protocols: | ||
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* PNM was our original, but now mostly legacy, protocol used in our versions 1 through 5. | * 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. | * There's also a HTTP/TCP-only fallback mode which is (usually) on port 8080. | ||
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| + | When a media player client is accessing those services, those service might have some affinity. A good [[load balancer]] need to combine those service together as a single load balancing service. | ||
== Architecture == | == Architecture == | ||
Latest revision as of 08:16, 8 April 2007
Contents
Introduction
Helix is an open source project started by Real Networks to provide audio and media service.
A single Helix server always has its limitation in performance. Server cluster can be used to scale up the performance of the whole Helix media system and provide redundancy.
Helix 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.
When a media player client is accessing those services, those service might have some affinity. A good load balancer need to combine those service together as a single load balancing service.
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
- How Do You Scale Your Digital Media Deployment
- http://archive.linuxvirtualserver.org/html/lvs-users/2001-06/msg00097.html
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