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Sonny's avatar
Sonny
Icon for Cirrus rankCirrus
Jun 28, 2017

Allowing users to access a VS while it's in maintenance mode

I wanted to get the community input as to what's the best way to go about letting users access a VS when you've have attached an irule which puts it in maintenance mode. Basically, the irule directs ...
application delivery
LTM
  • Stanislas_Piro2's avatar
    Stanislas_Piro2
    Jun 28, 2017

    Hi,

    you can try something like that

    when HTTP_REQUEST {
    if {[URI::query [HTTP::uri] bypassMaintenance] equals "true"} {
        HTTP::respond 302 Location [HTTP::path] "Set-Cookie" "bypassMaintenance=true;path=/"
    } elseif {[URI::query [HTTP::uri] bypassMaintenance] equals "false"} {
        HTTP::respond 302 Location [HTTP::path] "Set-Cookie" "bypassMaintenance=false;expires=Thu, 01-Jan-1970 00:00:01 GMT;path=/"
    } elseif {!([HTTP::cookie value bypassMaintenance] equals "true") } {
        pool maintenance
    }
}

    then in the browser, request 

    http://www.company.com/?bypassMaintenance=true
    all following requests will bypass maintenance pool. this add a cookie to bypass maintenance mode.

    to reactivate maintenance mode for this session, request 

    http://www.company.com/?bypassMaintenance=false
    . it will remove the cookie.

Samir_Jha_52506's avatar
Samir_Jha_52506
Icon for Noctilucent rankNoctilucent
Jun 28, 2017

Please find the below iRule for maintenance page.

Do you want to move all request to maintenance page? Yes

        when HTTP_REQUEST { 
        HTTP::respond 200 content {
            
             
        Apology Page
     
     
        We are sorry, but the site you are looking for is temporarily under maintenance.
        ----------- 
        Please try after sometime or contact your system administator 
     
  
        }
    }
}

Send request to maintenance page if VIP pool is down.

    when LB_FAILED {
          POOL-NAME is pool which you have attached to VIP
        if { [active_members POOL-NAME] < 1 } {
         Log and direct the client to Maintenance Page
        HTTP::respond 200 content {
        
        
        Apology Page
         
        
             We are sorry, but the site you are looking for is temporarily under maintenance.
        --
        Please try after sometime or contact your system administator 
         
     
            }
         }
    }

iRules Recipe 4: Static Maintenance Page link for Maintenance Page