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From Daniel Ruggeri <DRugg...@primary.net>
Subject Re: [users@httpd] Proxy Balancing Not working as Expected
Date Mon, 24 Jun 2013 23:44:33 GMT
On 6/24/2013 6:35 AM, nskarthik wrote:
> Hi
>
> SPEC : Apache 2.22
> O/s :Suse ent-10
> LBS for 2 Tomcat's with Session based
>
> Config currently
>
> #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`
> <IfModule !mod_proxy.c>
>     LoadModule proxy_module modules/mod_proxy.so
> </IfModule>
>
> LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
> LoadModule proxy_balancer_module modules/mod_proxy_balancer.so
> LoadModule proxy_http_module     modules/mod_proxy_http.so
> LoadModule proxy_connect_module  modules/mod_proxy_connect.s
>
>
> ProxyPass /balancer-manager !
> ProxyPreserveHost On
>
> <Proxy balancer://mycluster>
> BalancerMember http://192.168.4.32:8085/  loadfactor=50      #node1
> BalancerMember http://192.168.4.32:8086/  loadfactor=50      #node2
> ProxySet lbmethod=bytraffic timeout=15  
> </Proxy>
>
> ProxyPass / balancer://mycluster/ stickysession=JSESSIONID|jsessionid
> nofailover=On
> ProxyPassReverse / balancer://mycluster/
>
> #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> Problem
> a)If any one IP/PORT of node is down , Does the above config route to
> another node which is alive one ?
> b)What would happen to the session already latched to the node. ?
>  
> I have tried evaluating both cases , but failed 
>
>
> with regards
> karthik

a) If one node is down, the other will be elected for new traffic.
b) If there is a session sticky cookie to one node, the user will
receive an error (BAD GATEWAY) because nofailover is set. This parameter
ensures that if a failure occurs on the sticky node, the user stays put.

--
Daniel Ruggeri


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