Maintenance URL by iRule

If you already have a maintenance.html page on the site, then I would use this

when HTTP_REDIRECT {
    if { not ([HTTP::uri] equals "/maintenance.html") } {
        HTTP::redirect "http://www.abc.com/maintenance.html"
    }
}    

Otherwise, you would have an endless loop because it's not checking if you're already on that page.

If you want a iRule based maintenance page, the Codeshare page has some examples of that.

Hi Micheal,

 

Thank you..please find updated

 

when HTTP_REQUEST { if { not ([HTTP::uri] equals "/maintenance.html") } { HTTP::redirect "http://www.abc.com/maintenance.html" } }

 

Hi Michael,

 

is it when HTTP_REDIRECT

 

or

 

when HTTP_REQUEST

 

Because "when HTTP_REDIRECT" is not accepting. and error as below

 

Exception caught in LocalLB::urn:iControl:LocalLB/Rule::create() Exception: Common::OperationFailed primary_error_code : 17236305 (0x01070151) secondary_error_code : 0 error_string : 01070151:3: Rule [/Common/Maintenance_iRule_4] error: /Common/Maintenance_iRule_4:1: error: [unknown event (HTTP_REDIRECT)][when HTTP_REDIRECT { if { not ([HTTP::uri] equals "/maintenance.html") } { HTTP::redirect "/maintenance.html" } }]

 

Updated: The other option would just use the uri, which would look like this instead...

when HTTP_REDIRECT {
    if { not ([HTTP::uri] equals "/maintenance.html") } {
        HTTP::redirect "/maintenance.html"
    }
}    

we have made the below iRule and it is working...but images are blocking. images are in /images/

 

can we exclude images by conditions...?

 

when HTTP_REDIRECT { if { not ([HTTP::uri] equals "/maintenance.html") } { HTTP::redirect "/maintenance.html" } }

 

Try this then. If you want to add more exceptions, just append them to the first set of URI checks (the

-

denotes an additional value is on the next line). The

-glob

allows the use of wildcards (the

*

character). So in this case, anything starting with

/images/

will be caught in that condition.

when HTTP_REQUEST { 
    switch -glob [string tolower [HTTP::uri]] {
        "/maintenance.html" -
        "/images/*" {
             Do nothing. These are exceptions
            return
        }
        default {
            HTTP::redirect "/maintenance.html"                 
        }
    } 
}