Application Dependencies and the importance of having correct detection methods in your deployment types for ConfigMgr 2012

May 30, 2012 at 7:15 pm in Uncategorized by Kenny Buntinx [MVP]

A brand new feature in CM’s 2012 application model is the ability to set dependencies on applications. This is something that I have been waiting for to replace task sequences in CM07. Of course every “application” must have a deployment type and in that deployment type you will then need to specify a valid detection method .

If your detection method in one of the chaining dependencies is wrong , the whole “application” with dependent applications will fail .

Troubleshooting could be hard , but here is how to easy logic behind it :

– The policy will reach the client and the client will launch the application thru the Application catalog.

– The application will check which deployment type is valid and then it will check thru your defined detection method (s) if the “application” is installed on the machine. A detection method could be MSI product code , Registry , File or custom script . In my case a registry key as shown in the picture below :

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It will check if the above registry key is in place , based on the above detection method. You could find that back in the “Appenforce.log” or “Appdiscovery.log”

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– If the “application” isn’t installed on the machine , it will start installation of the “application” . You could find that back in the “Appenforce.log” or “Appdiscovery.log”

You will see in this example below that the success code = 0

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– After the “application” is successfully installed thru the selected deployment type , it will check again thru your defined detection method (s) if the “application” is installed on the machine. IF your defined detection method (s) fail , the “application” will fail as well !

In the case where I made a mistake :

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In the case I corrected my mistake :

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– your Application deployment (re-)evaluation cycle will kick off every seven days by default and will launch your detection methods again to see if the application is still installed (dummy user protection Smile ) . This means if you change your detection methods in the meanwhile on your existing application , it will validate the new detection mechanism rules !

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My advise : Test – Test –Test or use simulated deployment to rule out basic mistakes .

Hope it Helps ,

Kenny Buntinx

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