maintenance

Would the fallback host option in the http profile not work for you?

Not sure, how would that work? Here is an example. We do maintenace one very few weeks. I have 6 pools. I would like to force fail the pools, and then send all the requests to another URL. Once we are done with maintenance, I would like to un-fail, and allow traffic back to the 6 pools.

You can always get the number of active members in the current pool with the active_members command. Something like this should work for you...

when HTTP_REQUEST {
  if { 0 == [active_members [LB::server pool]] } {
    HTTP::redirect "http://backup_domain/maintenance.html"
  }
}

Then, just disable all members in the pool and the active_members count will go to zero and the redirect will occur.

Keep in mind, that you could also embed a HTML page directly in the iRule and return that with a HTTP::respond. See the "Custom Reporting with iRules" tech tip I wrote a while back...

http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=66

Click here

The only gotcha is that you can't store any images on the BIG-IP, the response will have to be the entire content.

-Joe

This works great, but I just need one more question answered. I have around 500 pools, how do i set a redirect based off the domain. I don't really want to create 1 rule for each pool.

 

 

Example:

 

 

I want to send *.mysite.com to maintenance.mysite.com and want to send *.mysitealso.com to maintenance.mysitealso.com

 

It's your lucky day, I think the domain command is just what you need!

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

Click here

Give this a shot...

when HTTP_REQUEST {
  if { 0 == [active_members [LB::server pool]] } {
    set dom [domain [HTTP::host] 2]
    HTTP::redirect "http://maintenance.${dom}"
  }
}

Or, without the local variable

when HTTP_REQUEST {
  if { 0 == [active_members [LB::server pool]] } {
    HTTP::redirect "http://maintenance.[domain [HTTP::host] 2]"
  }
}

-Joe