The vSphere Client indicates, with an icon on the cluster object, whether a cluster is valid, overcommitted (yellow triangle), or invalid (red diamond). DRS clusters can become overcommitted or invalid because:
- A cluster can become overcommitted if a host fails.
- A cluster can become invalid if you use the vSphere Client to directly access the ESXi host to power on or make changes to the virtual machine.
- A cluster can become invalid if the user reduces the reservation on a parent resource pool while a virtual machine is failing over.