LB_Failed redirection

Do you want to select the second pool at the time of the initial request or only when load balancing fails? If the former, can you change the event from LB_FAILED to CLLIENT_ACCEPTED or HTTP_REQUEST?

If the latter, can you try using LB::reselect:

 
 when LB_FAILED { 
    if { [active_members [LB::server pool]] < 1 } { 
       snatpool PROD_WebSrvrs 
       LB::reselect pool pool_7185 
    } 
 }  
 

Here are a few related examples:

Help with avoiding Reselect bug in LB_Failed

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=34031

downing a member from LB_FAILED

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=62849

Aaron

Thanx Hoolio...

 

I have used Client Accepted and it is somehow working.

 

 

But I also need 503 header response.

 

 

So you want to replace whatever status code the new pool member sets with a 503?

 

 

HTTP::status (Click here) can only be used to get (not set) the status of the response. So to "change" the status you could need to send your own response using HTTP::respond (Click here) . It's fairly simple if you can send your own response content. Or if you need to leave the response data from the server intact, you'd need to collect the payload for the specific responses and then use HTTP::respond to send a 503 response with the original payload. You can check the HTTP::collect wiki page (Click here) for examples.

 

 

Aaron