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Forum Discussion

harton's avatar
harton
Icon for Nimbostratus rankNimbostratus
Mar 25, 2014

iRule to Kick Off Process with External URL

Hi Everyone, I'm still learning iRules, so I don't know the full extent of it's capabilities. I've searched around but I can't seem to find anything. I'm guessing it's not doable, but I thought I would pose the question to the community.

 

Here's my scenario: I have two data centers (DC) with GTM and LTMs in both DCs. I have an application that will be running in DC-1. If the health check marks this side down, we want to see if the F5 (either GTM or LTM) can somehow start a process by firing off a HTTP GET that goes after a URL that is in DC-2. The GTM will do it's normal DNS update and the firing of the URL will kick off some processes that will begin to run in DC-2. Is this possible with an iRule or something?

 

Thanks for any help.

 

application delivery
BIG-IP DNS
design
devops
iRules
LTM

1 Reply

  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Mar 25, 2014

    I see potentially three option:

     

    1. Considering this is part of the health check process, you could switch to an external monitor and use a Bash script to cURL the remote resource. This would get triggered when the health monitor fails.

       

    2. You could launch an iCall (or user_alert.conf) process to initiate a cURL request. This would get triggered from an iRule condition (generally a syslog message).

       

    3. You could fire off a sideband call within an iRule. This would get triggered within an iRule condition and as part of the application flow.