Document empty or nil prometheus service/pod monitors (#2579)

Signed-off-by: Pavol Loffay <[email protected]>

Author: pavolloffay

apis/v1alpha1/opentelemetrycollector_types.go

@@ -380,11 +380,13 @@ type OpenTelemetryTargetAllocatorPrometheusCR struct {
 	// PodMonitors to be selected for target discovery.
 	// This is a map of {key,value} pairs. Each {key,value} in the map is going to exactly match a label in a
 	// PodMonitor's meta labels. The requirements are ANDed.
+	// Empty or nil map matches all pod monitors.
 	// +optional
 	PodMonitorSelector map[string]string `json:"podMonitorSelector,omitempty"`
 	// ServiceMonitors to be selected for target discovery.
 	// This is a map of {key,value} pairs. Each {key,value} in the map is going to exactly match a label in a
 	// ServiceMonitor's meta labels. The requirements are ANDed.
+	// Empty or nil map matches all service monitors.
 	// +optional
 	ServiceMonitorSelector map[string]string `json:"serviceMonitorSelector,omitempty"`
 }