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Linux++:::: Load balancing web requests
Posted at 25.Mar,2005 10:21  Comments 0 / Trackbacks 0 / Like this post!
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I replaced my old piranha powered load balancer with a new keepalived powered one. keepalived keeled over and died.

What's up? I have no idea.

The situation:

I have a heavily loaded site that's fronted by piranha on an old i686 128 M RAM. I thought that it's a good time i replaced that with a keepalived installation. I've used keepalived on another site with no problems at all.

So, replaced piranha, I did. After a few minutes, kepalived inhibited all my real servers. What the? Fiddled with the connect_timeout, nb_get_retry, and delay_before_entry, still the same.

Here's the value that I tried:
-30, 10, 1
-120, 50, 1
-60, 10, 1

I have no problems with piranha. the ipvsadm with piranha:



IP Virtual Server version 0.8.2 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 20x.x.x.x:http wlc
-> 19x.x.x.x:http Masq 1 58 5707
TCP 20x.x.x.x:http wlc
-> i:http Masq 1 0 0
TCP 20x.x.x.x:http wlc persistent 1
-> s4:http Masq 3000 210 1
-> s9:http Masq 5500 357 1303
-> s10:http Masq 5500 402 1058
-> s2:http Masq 5500 317 3006
-> s11:http Masq 5500 319 3619
-> s7:http Masq 4000 337 1437
-> s8:http Masq 6500 276 8644


Now, keepalived works with another site, as I've mentioned. The only difference is the load.

ipvsadm of the site (the one with less load):


IP Virtual Server version 1.2.0 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 20x.x.x.x:www wlc
-> s5:www Masq 1 5 1212
-> s4:www Masq 1 6 1139
-> s3:www Masq 1 7 946


So, reverted to piranha, I did. :(

Still trying to make sense of this.
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