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

luyenntk50db · ‎29-Jan-2021

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!

iaine · ‎29-Jan-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>
 
   }
 
  }
 
}

luyenntk50db · ‎31-Jan-2021

Thanks for ,

I changed belong as you. But irule failed.

iaine · ‎01-Feb-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

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