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luyenntk50db's avatar
luyenntk50db
Icon for Nimbostratus rankNimbostratus
Jan 29, 2021

Using an iRule to display a maintenance page when the pool is down

I have configured to redirect Virtual server to maintenance page when all pool member down.

I have configured below guide:

https://support.f5.com/csp/article/K14702105

When i used irule below, Irule has completed configuration.

when HTTP_REQUEST { 

   if { [active_members [LB::server pool]] == 0 } { 

     HTTP::respond 200 content "

      <html>

         <head>

            <title>Maintenance Page</title>

         </head>

         <body>

            We are sorry, but the site you are looking for is temporarily out of service.

            If you feel you have reached this page in error, please try again.

         </body>

      </html>

      "

   }

}

But, when I edited as below, irule has not change:

when HTTP_REQUEST { 

  if { [active_members [LB::server pool]] == 0 } {

   HTTP::respond 200 content "

   <html>

     <head>

      <title>Maintenance Page</title>

     </head>

     <body>

     <article>

       <center><h1 style="color: #000;">

      Xin lỗi quý vị, hệ thống đang được bảo trì. Xin quý vị quay lại sau khi bảo trì hoàn tất.</h1> <center>

      <div>

    <center><h1 style="color: #000;">Xin trân trọng cảm ơn!.<p></p><center>

    </center></h1></center></div>

     <article>

     </body>

   </html>

   "

  }

}

Errors as below:

 

 

Pls guide me!

application delivery
BIG-IP
iRules

3 Replies

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  • iaine's avatar
    iaine
    Icon for Nacreous rankNacreous
    Jan 29, 2021

    Hi

    Try changing the " " to group the HTML to { } braces instead as per the error. Suspect the " in the style lines are causing a conflict.

    when HTTP_REQUEST { 
 
  if { [active_members [LB::server pool]] == 0 } {
 
   HTTP::respond 200 content {
 
   <html>
 
     <head>
 
      <title>Maintenance Page</title>
 
     </head>
 
     <body>
 
     <article>
 
       <center><h1 style="color: #000;">
 
      Xin lỗi quý vị, hệ thống đang được bảo trì. Xin quý vị quay lại sau khi bảo trì hoàn tất.</h1> <center>
 
      <div>
 
    <center><h1 style="color: #000;">Xin trân trọng cảm ơn!.<p></p><center>
 
    </center></h1></center></div>
 
     <article>
 
     </body>
 
   </html>
 
   }
 
  }
 
}
  • iaine's avatar
    iaine
    Icon for Nacreous rankNacreous
    Feb 01, 2021

    OK - so you could either move your html code to a variable and then make a call to it like this

     

    when RULE_INIT {
 
set static::sorry_code {
<html>
 
     <head>
 
      <title>Maintenance Page</title>
 
     </head>
 
     <body>
 
     <article>
 
       <center><h1 style="color: #000;">
 
      Xin lỗi quý vị, hệ thống đang được bảo trì. Xin quý vị quay lại sau khi bảo trì hoàn tất.</h1> <center>
 
      <div>
 
    <center><h1 style="color: #000;">Xin trân trọng cảm ơn!.<p></p><center>
 
    </center></h1></center></div>
 
     <article>
 
     </body>
 
   </html>
 
 
}
 
}
 
 
when HTTP_REQUEST { 
 
  if { [active_members [LB::server pool]] == 0 } {
 
   HTTP::respond 200 content $static::sorry_page
 
  }
 
}

    ...or you could try moving the html code to an iFile - https://clouddocs.f5.com/api/irules/iFile.html - if there are any strange characters in the html code that is causing a conflict then this method should resolve these issues