Add function to check the status of the owner of an object

Function verifies:
- Ready condition is True
- observedGeneration matches generation

Author: lmiccini

modules/common/object/metadata.go

@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"slices"
 
+	"github.com/openstack-k8s-operators/lib-common/modules/common/condition"
 	"github.com/openstack-k8s-operators/lib-common/modules/common/helper"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
@@ -31,6 +32,8 @@ import (
 
 	k8s_errors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 )
 
 // CheckOwnerRefExist - returns true if the owner is already in the owner ref list
@@ -114,3 +117,110 @@ func EnsureOwnerRef(
 
 	return nil
 }
+
+// IsOwnerServiceReady checks if the owner service that owns this object is ready.
+// Returns true if the owner is ready, false if not ready, and error only for unexpected failures.
+// If there's no owner with controller=true, it returns true (safe to proceed).
+func IsOwnerServiceReady(
+	ctx context.Context,
+	h *helper.Helper,
+	obj client.Object,
+) (bool, error) {
+	// Find the controller owner reference (e.g., Cinder, Nova, etc.)
+	var ownerRef *metav1.OwnerReference
+	for _, owner := range obj.GetOwnerReferences() {
+		if owner.Controller != nil && *owner.Controller {
+			ownerRef = &owner
+			break
+		}
+	}
+
+	// If no controlling owner, safe to proceed
+	if ownerRef == nil {
+		h.GetLogger().Info("No controller owner found, owner is considered ready")
+		return true, nil
+	}
+
+	// Parse the APIVersion to extract group and version
+	gv, err := schema.ParseGroupVersion(ownerRef.APIVersion)
+	if err != nil {
+		h.GetLogger().Error(err, "Failed to parse owner APIVersion", "apiVersion", ownerRef.APIVersion)
+		return false, err
+	}
+
+	// Fetch the owner resource using unstructured client
+	owner := &unstructured.Unstructured{}
+	owner.SetGroupVersionKind(schema.GroupVersionKind{
+		Group:   gv.Group,
+		Version: gv.Version,
+		Kind:    ownerRef.Kind,
+	})
+
+	err = h.GetClient().Get(ctx, types.NamespacedName{
+		Name:      ownerRef.Name,
+		Namespace: obj.GetNamespace(),
+	}, owner)
+
+	if err != nil {
+		if k8s_errors.IsNotFound(err) {
+			// Owner deleted, safe to proceed
+			h.GetLogger().Info("Owner resource not found, owner is considered ready", "kind", ownerRef.Kind, "name", ownerRef.Name)
+			return true, nil
+		}
+		// Unexpected error, log and return error
+		h.GetLogger().Error(err, "Failed to fetch owner resource", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, err
+	}
+
+	// Check status.conditions for Ready condition
+	conditions, found, err := unstructured.NestedSlice(owner.Object, "status", "conditions")
+	if err != nil || !found {
+		h.GetLogger().Info("No conditions found in owner status, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	// Marshal unstructured conditions to condition.Conditions to use existing helper functions
+	conditionsJSON, err := json.Marshal(conditions)
+	if err != nil {
+		h.GetLogger().Info("Failed to marshal owner conditions, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	var ownerConditions condition.Conditions
+	err = json.Unmarshal(conditionsJSON, &ownerConditions)
+	if err != nil {
+		h.GetLogger().Info("Failed to unmarshal owner conditions, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	// Use existing helper function to check if Ready condition is True
+	if !ownerConditions.IsTrue(condition.ReadyCondition) {
+		h.GetLogger().Info("Owner service not ready, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	// Check if owner has reconciled (observedGeneration matches generation)
+	generation, foundGen, err := unstructured.NestedInt64(owner.Object, "metadata", "generation")
+	if err != nil || !foundGen {
+		h.GetLogger().Info("Could not get owner generation, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	observedGeneration, foundObsGen, err := unstructured.NestedInt64(owner.Object, "status", "observedGeneration")
+	if err != nil || !foundObsGen {
+		h.GetLogger().Info("Could not get owner observedGeneration, waiting", "kind", ownerRef.Kind, "name", ownerRef.Name)
+		return false, nil
+	}
+
+	if observedGeneration != generation {
+		h.GetLogger().Info("Owner service has not reconciled yet (observedGeneration != generation), waiting",
+			"kind", ownerRef.Kind,
+			"name", ownerRef.Name,
+			"generation", generation,
+			"observedGeneration", observedGeneration)
+		return false, nil
+	}
+
+	h.GetLogger().Info("Owner service is ready and has reconciled, safe to proceed", "kind", ownerRef.Kind, "name", ownerRef.Name)
+	return true, nil
+}