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//> On Tue, 5 Apr 2005 12:31:15 -0400,
//> "Brad Taylor" <btaylor@xxxxxxxxxxxx> wrote:
> I still don't get how it check the real server. Is it HTTP? My real
> server will be an IIS server will that matter?
ldirectord determines the protocol to use for health checking by reading
the configuration option "service". If service=http (in ldirectord.cf),
ldirectord uses the http protocol to check the real servers. It does
nothing more than a normal HTTP GET request. Like:
GET /index.html HTTP/1.0
ldirectord then searches for the regular expression specified by
"receive" option in the HTML code the real server responded, with. If
it doesn't find the regular expression within the response, or the real
server does not answer in general, it will take the particular real
server out of the load balancing.
Is that what you are asking for?
It doesn't matter which webserver you use, as far it understands the
HTTP protocol. It works fine with MS IIS, too.
> # Virtual Server for HTTP
> virtual=10.1.3.61:80
> fallback=127.0.0.1:80
> real=192.168.6.4:80 masq
> real=192.168.6.5:80 masq
> service=http
> request="index.html"
> receive="Test Page"
> scheduler=rr
> #persistent=600
> protocol=tcp
> checktype=negotiate
> In the above the LVS checks http://192.168.6.4/index.html What would be
> the contents of index.html? Just "Test Page" without quotes? Thanks.
It searches for the string "Test Page" in the resulting HTML code (in
this case index.html) from the real server.
Regards,
Volker
Volker Dormeyer <volker@xxxxxxxxxxxx>
> -----Original Message-----
> From: Malcolm Turnbull [mailto:malcolm@xxxxxxxxxxxxxxxx]
> Sent: Tuesday, April 05, 2005 11:27 AM
> To: LinuxVirtualServer.org users mailing list.
> Subject: Re: ldirectord.cf
> If the checktype is negotiate then the page will be grep'd for the
> recieve string,
> details are in the man page for ldirectord (or the perl source).
> Other checks are documented for DNS,FTP IMAP etc.
> Brad Taylor wrote:
>> In file ldirectord.cf how does the below work?
>>
>> request="index.html"
>> receive="Test Page"
>>
>> How is the request send? http? Is index.html a text file with the
> words
>> "Test Page"? Does that page need to be in HTML? Is "Test Page" the
>> title or body. Is there documentation on request and receive. The man
>> page doesn't answer these questions. Thanks
>>
>> Brad
>>
>> _______________________________________________
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>>
>>
> --
> Regards,
> Malcolm Turnbull.
> Loadbalancer.org Limited
> Office: +44 (0)870 443 8779
> Mobile: +44 (0)7715 770523
> http://www.loadbalancer.org/
> " When a single point of failure is not an option"
> Why not try our online demonstration
> <http://www.loadbalancer.org/online_Demo.htm> ? Or get answers to common
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> _______________________________________________
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> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> or go to http://www.in-addr.de/mailman/listinfo/lvs-users
> _______________________________________________
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> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
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