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From Szász Csaba <szasz.cs...@gmail.com>
Subject Re: [users@httpd] How to make apache httpd load balancer sends to a member that is in Err.
Date Fri, 21 Jan 2011 10:51:06 GMT
Hi,

I don't know if the Message Broker has Web server plug-in or not. This
is very useful to use between WAS and various HTTP servers.
http://www.ibm.com/developerworks/websphere/library/techarticles/0310_cocasse/cocasse.html
It handles overloaded or hanging backend systems.


2011/1/20 James Harrison <jamesaharrisonuk@yahoo.co.uk>:
> Hello.
>
> Does anyone have an idea what I need to do to fix my problems?
>
> I'm completely clueless how to fix my problems.
>
> Thanks,
> James Harrison
>
> ________________________________
> From: James Harrison <jamesaharrisonuk@yahoo.co.uk>
> To: users@httpd.apache.org
> Sent: Thu, January 20, 2011 9:28:42 AM
> Subject: [users@httpd] How to make apache httpd load balancer sends to a
> member that is in Err.
>
> Hello.
>
> This is quite an urgent plea for help.
>
> I am using apache httpd 2.2.17 on Windows 2008 server as a gateway to our
> backend systems. The backend are two IBM's Websphere Message Broker (v7)
> system, that uses SOAP messages to send information back and forth. There
> are two hosts (machines) running the Broker software in an active-active
> configuration.
>
> There are two ports that are available for communication from the httpd to
> the Broker (7803 and 7805), however, the actual services are URL based, so
> to communicate to a service, I would use: https://{hostname}:7803/url/path
> and I wouldget a response.
>
> I have four major problems:
> 1. Broker services can switch from one machine to another at any time and
> httpd doesn't know this until a request is sent and httpd returns error code
> 404 and the SOAP request is lost.
>
> 2. I have the two Broker communication ports in a load balancer
> configuration and I use (failonstatus) to check for backend errors. httpd
> still sends SOAP requests to load balancer members in "Err"!
>
> 3. The first request to a member in Err results in return code 404, from
> that point the load balancer will not use that member, however this means
> that the initial request is lost.
>
> 4. When requests stop coming into the httpd server, after a timeout occurs
> and the above problem (3) occurs again.
>
> Here is my configuration for the load balancer and one of the services:
>
>
> # ------------------------------------------------------------
>
> Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/"
> env=BALANCER_ROUTE_CHANGED
>
> <Proxy balancer://mycluster nofailover=Off stickysession=ROUTEID
> failonstatus=404,301,500>
>        BalancerMember https://256.XX.57.181:7805 route=191_181_7805
> redirect=191_180_7803 keepalive=on timeout=1200
>        BalancerMember https://256.XX.57.180:7803 route=191_180_7803
> status=+H keepalive=on timeout=1200
>        ProxySet lbmethod=byrequests timeout=600
> </Proxy>
>
> # https://256.xx.xx.191/ balancer-manager
> ProxyPass /balancer-manager !
>
> ProxyPass / balancer://mycluster/
>
> # GeoSupportService service
> <location /GeographyServices/ GeoSupportService_v1_0>
>        ProxyPass balancer://mycluster/
> </Location>
>
> <Location /balancer-manager>
>        SetHandler balancer-manager
>        Order Allow,Deny
>        Allow from all
> </Location>
>
> ErrorLog logs/VirtualHosterror.log
> LogLevel error
> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i
> \"" combined
> LogFormat "%h %l %u %t \"%r\" %>s %b" common
> LogFormat "%{Referer}i -> %U" referer
> LogFormat "%{User-agent}i" agent
> CustomLog logs/VirtualHostaccess.log common
>
>
> # ------------------------------------------------------------
>
> I hope someone can help.
>
> Many thanks,
> James Harrison
>
>



-- 
Üdvözlettel / Best Regards / Mit freundlichen Grüßen
Tsaby


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