Re: CSM and proxy stickyness

f.franceschini · ‎07-18-2003

Hi all,

let me explain my testbed:

- 16 frontend proxy servers

- 72 backend application servers (AS)

requests to the proxy servers are first balanced from a couple of css; after that the new request originating from the proxy is balanced between the 72 backend AS from a couple of CSM.

I instructed the proxy to populate the X-Forwarded-For header field so that the CSM can still see the client IP in the header.

How can I configure some sort of stickyness on the CSM to meet these requirements:

1) the 72 AS are equally loaded;

2) Request from the same client are directed to the same AS;

Thanks in advance.

Fausto Franceschini

Gilles Dufour · ‎07-20-2003

unfortunately, this is not possible.

First reason is that the header match function, can't match a X-forward header currently.

What I would suggest is do cookie sticky if your servers can generate a cookie or use the 'cookie insert' feature of the csm (the command is 'sticky 1 cookie insert'

Regards,

Gilles.

Gilles Dufour · ‎07-21-2003

Sorry.

I need to correct what I said.

You can stick on any header field with the command

'sticy <1-255> header '

Gilles.

f.franceschini · ‎07-21-2003

Thanks Gilles,

I'll try this configuration as soon as possible.

Fausto

Gilles Dufour · ‎07-22-2003

Fausto,

sorry for this, but I was in touch with our developper about the command I gave you and unfortunately I have to say that the command is there, but the code not :-(

It means the command is useless.

This command will only work starting with version 3.3

Gilles.

f.franceschini · ‎07-23-2003

Hi Gilles,

do you know when release 3.3 will be available?

Fausto

Gilles Dufour · ‎07-23-2003

6 to 12 months I would say.

3.2 is just coming out now.

Gilles.

f.franceschini · ‎07-21-2003

Is there something similiar on the CSS as well?

Thanks

Fausto

Gilles Dufour · ‎07-21-2003

this for sure, the answer is NO.

Same workaround as I gave you earlier with cookie.

Gilles.