[Building Sakai] nofailover setting of apache proxy load balancing

[Sanghyun Jeon]

Hi all,

Unfortunately, I have not heard back from anybody.

I found one thread discussing about the same issue I currently have, but
there was no answer. I am wondering anybody can confirm nofailover=0 is the
right way to redirect our users with lost connection to the next available
Sakai instance. Thank you in advance.

S


On Mon, Jan 13, 2014 at 3:18 PM, Sanghyun Jeon <euksa99 at gmail.com> wrote:

> Hello all,
>
> We are currently using Apache Proxy Balancer as per this guide
>
> https://confluence.sakaiproject.org/display/DOC/Sakai+Admin+Guide+-+Advanced+Tomcat++%28and+Apache%29+Configuration
>
>
> Our problem is
> whenever a tomcat instance goes down (ie crashes), users are sticky to
> that unusable tomcat instance forever (unless our users delete their
> browser's cache or login with a different browser). We would like to let
> our load balancer redirect the users to the next available instance, if the
> user's previous tomcat instance becomes unavailable (crashes or else). The
> users might lose their previous session information but they can start
> again without clicking the unusable site forever.
> We've read nofailover setting (nofailover=off) might be our solution, but
> we would like to have some type of confirmation from other experienced
> developers.
>
> Below is our current setting. We have one apache server and two app node
> servers(two tomcats per each app node server)
>
> 66  ProxyPass /balancer-manager !
>
> 73  # Pass everything else
>
>  74  ProxyPass / balancer://sakaiCluster/ stickysession=JSESSIONID
> nofailover=On
>
>   75  <Proxy balancer://sakaiCluster>
>
>   76   BalancerMember ajp://XXXX:8009 route=Sakai1A ttl=60
>
>   77   BalancerMember ajp://XXXX:8010 route=Sakai1B ttl=60
>
>   78   BalancerMember ajp://XXXX:8009 route=Sakai2A ttl=60
>
>   79   BalancerMember ajp://XXXX:8010 route=Sakai2B ttl=60
>
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