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Jean-Francois Nadeau wrote:
>
> Hi !
>
> I want to create a cluster of 2 Apache web servers. What I need is a way to
> send 100 % of the load on the first real server and switch the exedent
> requests locally.
>
> Ex : Server1 (172.17.20.151) gets 100 % of the load until it reaches 400
> connections. The next requests would go locally on 127.0.0.1.
>
> ipvsadm -C
> ipvsadm -A -t 172.17.20.161:0 -s rr -p 300
> ipvsadm -a -t 172.17.20.161:0 -r 127.0.0.1:0 -w 0
> ipvsadm -a -t 172.17.20.161:0 -r 172.16.20.151:0 -w 100
>
> ipvsadm -l
> IP Virtual Server version 0.9.5 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP 172.17.20.161:(null) rr persistent 300
> -> localhost:(null) Local 00 0 0
> -> 172.17.20.160:(null) Route 100 0 0
>
> I could rewrite:
> ipvsadm -e -t 172.17.20.161:0 -r 127.0.0.1:0 -w 100
> ipvsadm -e -t 172.17.20.161:0 -r :0 -w 0
>
> when I see 400 ActiveConn using a script...
>
> But I dont want the request on 127.0.0.1 to be persistent !
>
> Any idea on how to do this ?
>
I don't understand why you want to set requests to 172.17.20.160
persistent and not to set request to localhost persistent. It doesn't
hurt when you leave the virtual server persistent. :-) After your real
server recovers from the overloaded state, you can set "ipvsadm -e -t
172.17.20.161:0 -r localhost -w 0" and "ipvsadm -e -t 172.17.20.161:0
-r 172.17.20.160 -w 100". After all the persistent connections to the
localhost expires, all new connections go to your real server.
Anyway, if you don't want your service persistent, just simple do
"ipvsadm -E -t 172.17.20.161:0 -s rr"
Wensong
> Can I desactivate the persitent connections on 127.0.0.1 ?
>
> Any better way of doing this ?
>
> Where in the code should I look to create my own sets of scheduling algo ?
>
> Thanks in advance.
> Jean-Francois Nadeau
>
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