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On Wed, 14 Dec 2005, Purcocks, Graham wrote:
OK I understand the question more, but on what are you
basing the decision to go the 'special cluster'? If its
something inside the http packet then that is outside of
the scope of a LVS router. It doesn't analyse packets
(that I know of) you'd need some helper code.
the director doesn't look at the content of the packets (eg
the URL), just the dst_ip:dst_port
I still don't quite see why it isn't a redirect. If you
add another address for the special cluster which the
redirect goes to, the when a real server in your main
cluster gets the redirect, then if its not in the special
cluster it will not have that VIP so the request will do
back to the director and be redirected to a real server in
the 'special cluster'. If it is in the 'special cluster'
then it will be resolved as localhost and so be serviced
directly by that real server.
LVS isn't real good about doing this, ie having the
realservers sending requests back to the director.
The code is out there, but no-one is using it yet
for us to know if it really works.
In fact "//ipApplication" is confusing. With "//ipApplication" I meant the
virtual ip that is used for clients to access to cluster.
But there's something that I'm loosing. Director nodes (meaning the nodes
that balances requests from clients) don't use apache for anything
correct. I was talking about apache on the realserver doing
something special with your special url.
Once the cluster node gets the request it looks to apache configuration and
whatever to serve this request.
yes
So when a Director node receives a request for a special web application
that is only in one cluster node (for example node35)
no. The director just sees the IP on the packet. It doesn't
know that you have 1024 virtual IPs/URLs using that IP. The
packets for your whole range of virtual IPs will be sent to
the realservers as if they all were to one site.
please edit your postings. We don't need 3 levels of your
disclaimer
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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