On our WLS servers we use Node Manager to manage the WLS instances. The project defines the requirement to monitor the Node Manager instances on the several servers with the OEM 12c. I searched the OEM 12c documentation for this but didn't find any hints to solve this task. In our OEM console I can see the WLS servers as targets after the Auto Discovery but not the Node Managers.
Is it possible to add the Node Mangers as targets and monitor them with the OEM 12c? If yes, where can I find the relevant documentation?
It is not possible to monitor a Node Manager with the OEM 12c out of the box. There is no such target. If you want to monitor the Node Manager you must implement a plugin with the extention framework. Got the information from Oracle Support.