Add Support for supplemental groups

pkg/api/types.go

@@ -1008,6 +1008,12 @@ type PodSecurityContext struct {
 	// Use the host's ipc namespace.
 	// Optional: Default to false.
 	HostIPC bool `json:"hostIPC,omitempty"`
+
+	// SupplementalGroups can be used to specify a list of
+	// additional groups which the main container process will run
+	// as. This will be applied to all containers in the pod in
+	// addition to the primary group of the container.
+	SupplementalGroups []int64 `json:"supplementalGroups,omitempty"`
 }
 
 // PodStatus represents information about the status of a pod. Status may trail the actual