Schedule iRule

Joe actually walks through doing something like this, sort of:

 

 

http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=70

 

http://devcentral.f5.com/wiki/default.aspx/iRules/LTMMaintenanceWindow.html

 

 

This is for bringing up a maintenance page at a given part of the day. It could be modified for your purposes, though.

 

 

Colin

Here's a simple example as well for 10.x:

when RULE_INIT {

    Start of maintenance window in YYYY-mm-dd HH:MM format
   set static::start_date "2011-05-29 18:45"

    End of maintenance window in YYYY-mm-dd HH:MM format
   set static::end_date "2011-05-29 18:50"

    Convert start/end times to seconds from the epoch for easier date comparisons
   set static::start [clock scan $static::start_date]
   set static::end [clock scan $static::end_date]
}
when CLIENT_ACCEPTED {

   set now [clock seconds]
   if {$now > $static::start and $now < static::end}{
      pool MAINT_POOL
   }
}

Aaron

i was under the impression that setting the static end date and time the irule would no longer process a redirect or whatever method it was instrcuted. is that not the case?

or is this the missing piece?

 

set now [clock seconds]

 

if {$now > $static::start and $now < static::end}

 

 

 

 

Hi Steve,

 

 

Can you clarify what your question is?

 

 

Thanks, Aaron

sure, is the code that was shared capable of sending traffic to the maint_pool during the specified date/time frame? If so, after the date/time frame specified has passed, will traffic resume normally to the vip the irule is bound too?

 

Hi Steve,

 

 

If I understand your question properly you are concerned about what will happen after the end-time has been reached.

 

 

The iRule that hoolio provided sets a start time and stop time for the maintenance window.

 

 

After the end time the traffic should no longer be sent to your maintenance pool or page since the qualifiers in the iRule are no longer true. Then traffic would flow normally as if the iRule was not applied.

 

 

If you want the maintenance page to be put up at a certain time but not be taken down until you manually remove the iRule you could make a few adjustments to make that happen.

 

thanks Michael, that is what i was looking for. now i don't have a "pool" but i do have a url. do you know which command I could use other then pool that works with CLIENT_APPECTED? I tried to use HTTP::redirect but it doesn't seem to work with current event context.

Hi Steve,

You can look on the CLIENT_ACCEPTED event Wiki page to see a list of available commands in that event.

You are correct that you cannot use an HTTP::redirect or HTTP::respond in that event. You could however set a flag / variable in this event that is picked up in the HTTP_REQUEST event and triggers a redirect.

Here's an example:

 
when CLIENT_ACCEPTED {
 Check Client IP Address Exclusions GO HERE!
if { !([matchclass [IP::remote_addr] equals $::MaintenancePageOverride ]) } {

 If it's not on the exclusion list.  Tag it here.
set rewrite_response 1
} else {
 If it is to be excluded, set value here.
set rewrite_response 0
}
}
when HTTP_REQUEST {
if { [HTTP::uri] contains "maintenanceaccess" } {
set rewrite_response 3
}
}
when HTTP_RESPONSE {
if { $rewrite_response equals "1" } {
HTTP::respond 200 content "Site unavailable



System Maintenance
NOTICE: This website down for system maintenance. 

"
}
elseif { $rewrite_response equals "3" } {
HTTP::respond 200 content "Maintenance Access



Maintenance Access Assistance
Your IP Address is: [IP::client_addr] 

Please provide the IP Address listed above to the Support Team Representative assisting you with
your maintenance window.  This will allow the Representative to grant you override access to the
maintenance page.

Thank you.
"
}
}

so that is pretty tight script you have shared.. I can follow the logic on whats happening, but my tcl\irule chops are not even to a point where i could support that code.... thanks.