Monitor CPU and Memory of each VDOM using Check MK

We have two Fortigates 1000D clustered with 9 VDOMs deployed and several IPSEC tunnels. We currently use the Check MK product to monitor Firewalls and interfaces. In the current tool we have the visibility of interfaces, IPSEC tunnels, and Global (CPU, Memory and active sessions) objects . My issue: We are currently needing to monitor the Active Sessions, CPU and Memory of each VDOM, but unfortunately we are not able to implement this setting. Is there any configuration in the Fortigate that I need to do to achieve it?