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Hi,
Yes. At real server have another kernel module that can rebuild the
connection base on the packet that contains URLs. The DRWS-filter is the
module at real server. You can see the mechanism in the slides.
ps. I see your mail address from gnuchina.org! Maybe I can use
traditional Chinese to mail with you.
Motse
----- Original Message -----
From: "Wensong Zhang" <wensong@xxxxxxxxxxxx>
To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Sunday, April 14, 2002 11:04 PM
Subject: Re: DRWS-a layer 7 load balancer
>
>
> Hi,
>
> On Sat, 13 Apr 2002, 8923517 wrote:
>
> >
> > Now, in my implement, I only support 255 content types.
> >
> > the rule is file ext. match such as *.htm will redirect to
> >
> > server A and *.gif will redirect to server B.
> >
> > A type of content means a service in LVS.
> >
> > A special type 0xff, means not match any contents.
> >
> > At first, a syn packet comes to load balance, and it will match
> >
> > a service(0xff) , and redirect it to back end.
> >
> > After three-way handshae, client sends a packet with HTTP header,
> >
> > and the load balancer parses the header to find out the content
> >
> > type. And then, It find out a service that serives the content.
> >
> > If the dest. is the same as pervious back-end, the packet will
> >
> > be sent to that back-end. otherwise,the packet will be sent to
> >
> > a new server that services the content.
> >
>
> Does it work that the packet (whoes payload has URL request) is sent to a
> new server? it is broken, because there is no three-handshake to establish
> a TCP connection between the client and the new server. Unless you have
> already implemented some mechanism to migrate the socket end-point at the
> original server to the new server.
>
> Regards,
>
> Wensong
>
>
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