feat: namespace config for topic auto creation

api/v1alpha1/pulsarnamespace_types.go

@@ -22,6 +22,20 @@ import (
 	"github.com/streamnative/pulsar-resources-operator/pkg/utils"
 )
 
+// TopicAutoCreationConfig defines the configuration for automatic topic creation
+type TopicAutoCreationConfig struct {
+	// Allow specifies whether to allow automatic topic creation
+	Allow bool `json:"allow,omitempty"`
+
+	// Type specifies the type of automatically created topics
+	// +kubebuilder:validation:Enum=partitioned;non-partitioned
+	Type string `json:"type,omitempty"`
+
+	// Partitions specifies the default number of partitions for automatically created topics
+	// +optional
+	Partitions *int32 `json:"partitions,omitempty"`
+}
+
 // EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
 // NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
 
@@ -130,6 +144,11 @@ type PulsarNamespaceSpec struct {
 
 	// BookieAffinityGroup is the name of the namespace isolation policy to apply to the namespace.
 	BookieAffinityGroup *BookieAffinityGroupData `json:"bookieAffinityGroup,omitempty"`
+
+	// TopicAutoCreationConfig controls whether automatic topic creation is allowed in this namespace
+	// and configures properties of automatically created topics
+	// +optional
+	TopicAutoCreationConfig *TopicAutoCreationConfig `json:"topicAutoCreationConfig,omitempty"`
 }
 
 type BookieAffinityGroupData struct {

config/crd/bases/resource.streamnative.io_pulsarnamespaces.yaml

@@ -238,6 +238,28 @@ spec:
                   Should be set in conjunction with RetentionSize for effective retention policy.
                   Retention Quota must exceed configured backlog quota for namespace
                 type: string
+              topicAutoCreationConfig:
+                description: |-
+                  TopicAutoCreationConfig controls whether automatic topic creation is allowed in this namespace
+                  and configures properties of automatically created topics
+                properties:
+                  allow:
+                    description: Allow specifies whether to allow automatic topic
+                      creation
+                    type: boolean
+                  partitions:
+                    description: Partitions specifies the default number of partitions
+                      for automatically created topics
+                    format: int32
+                    type: integer
+                  type:
+                    description: Type specifies the type of automatically created
+                      topics
+                    enum:
+                    - partitioned
+                    - non-partitioned
+                    type: string
+                type: object
             required:
             - connectionRef
             - name

docs/pulsar_namespace.md

@@ -28,9 +28,48 @@ The `PulsarNamespace` resource defines a namespace in a Pulsar cluster. It allow
 | `replicationClusters`         | List of clusters to which the namespace is replicated. Use only if replicating clusters within the same Pulsar instance.                                                                                          | No       |
 | `deduplication`               | Whether to enable message deduplication for the namespace.                                                                                                                                                        | No       |
 | `bookieAffinityGroup`         | Set the bookie-affinity group for the namespace, which has two sub fields: `bookkeeperAffinityGroupPrimary(String)` is required, and `bookkeeperAffinityGroupSecondary(String)` is optional.                      | No       |
+| `topicAutoCreationConfig`     | Configures automatic topic creation behavior within this namespace. Contains settings for whether auto-creation is allowed, the type of topics created, and default number of partitions.                          | No       |
 
 Note: Valid time units are "s" (seconds), "m" (minutes), "h" (hours), "d" (days), "w" (weeks).
 
+## topicAutoCreationConfig
+
+The `topicAutoCreationConfig` field allows you to control the automatic topic creation behavior at the namespace level:
+
+| Field        | Description                                                                           | Required |
+|-------------|---------------------------------------------------------------------------------------|----------|
+| `allow`     | Whether automatic topic creation is allowed in this namespace.                         | No       |
+| `type`      | The type of topics to create automatically. Options: "partitioned", "non-partitioned". | No       |
+| `partitions`| The default number of partitions for automatically created topics when type is "partitioned". | No   |
+
+This configuration overrides the broker's default topic auto-creation settings for the specific namespace. When a client attempts to produce messages to or consume messages from a non-existent topic, the broker can automatically create that topic based on these settings.
+
+### Configuration examples
+
+1. **Enable auto-creation with partitioned topics**:
+   ```yaml
+   topicAutoCreationConfig:
+     allow: true
+     type: "partitioned"
+     partitions: 8
+   ```
+   This will automatically create partitioned topics with 8 partitions when clients attempt to use non-existent topics.
+
+2. **Enable auto-creation with non-partitioned topics**:
+   ```yaml
+   topicAutoCreationConfig:
+     allow: true
+     type: "non-partitioned"
+   ```
+   This will automatically create non-partitioned topics when clients attempt to use non-existent topics.
+
+3. **Disable auto-creation**:
+   ```yaml
+   topicAutoCreationConfig:
+     allow: false
+   ```
+   This explicitly disables topic auto-creation for the namespace, overriding any broker-level settings that might enable it.
+
 ## replicationClusters vs geoReplicationRefs
 
 The `replicationClusters` and `geoReplicationRefs` fields serve different purposes in configuring replication for a Pulsar namespace:
@@ -74,6 +113,10 @@ spec:
   # retentionTime: 20h
   # retentionSize: 2Gi
   # lifecyclePolicy: CleanUpAfterDeletion
+  # topicAutoCreationConfig:
+  #  allow: true
+  #  type: "partitioned"
+  #  partitions: 4
 ```
 
 2. Apply the YAML file to create the namespace.
@@ -101,7 +144,7 @@ Please note the following important points:
 
 1. The fields `name` and `bundles` cannot be updated after the namespace is created. These are immutable properties of the namespace.
 
-2. Other fields such as `backlogQuotaLimitSize`, `backlogQuotaLimitTime`, `messageTTL`, `maxProducersPerTopic`, `maxConsumersPerTopic`, `maxConsumersPerSubscription`, `retentionTime`, and `retentionSize` can be modified.
+2. Other fields such as `backlogQuotaLimitSize`, `backlogQuotaLimitTime`, `messageTTL`, `maxProducersPerTopic`, `maxConsumersPerTopic`, `maxConsumersPerSubscription`, `retentionTime`, `retentionSize`, and `topicAutoCreationConfig` can be modified.
 
 3. If you want to change the `connectionRef`, ensure that the new PulsarConnection resource exists and is properly configured. Changing the `connectionRef` can have significant implications:
 

pkg/admin/impl.go

@@ -471,6 +471,38 @@ func (p *PulsarAdminClient) applyNamespacePolicies(completeNSName string, params
 		}
 	}
 
+	// Handle topic auto-creation configuration
+	if params.TopicAutoCreationConfig != nil {
+		topicTypeStr, err := utils.ParseTopicType(params.TopicAutoCreationConfig.Type)
+		if err != nil {
+			return err
+		}
+
+		// Convert operator's TopicAutoCreationConfig to Pulsar client's TopicAutoCreationConfig
+		config := &utils.TopicAutoCreationConfig{
+			Allow: params.TopicAutoCreationConfig.Allow,
+			Type:  topicTypeStr,
+		}
+
+		// Set default partitions
+		if params.TopicAutoCreationConfig.Partitions != nil {
+			partitions := int(*params.TopicAutoCreationConfig.Partitions)
+			config.Partitions = &partitions
+		}
+
+		// Call Pulsar client API to set topic auto-creation configuration
+		err = p.adminClient.Namespaces().SetTopicAutoCreation(*naName, *config)
+		if err != nil {
+			return err
+		}
+	} else {
+		// If no configuration is specified, try to remove topic auto-creation configuration (ignore errors if it doesn't exist)
+		err = p.adminClient.Namespaces().RemoveTopicAutoCreation(*naName)
+		if err != nil && !IsNotFound(err) {
+			return err
+		}
+	}
+
 	return nil
 }
 

pkg/admin/interface.go

@@ -55,6 +55,7 @@ type NamespaceParams struct {
 	ReplicationClusters         []string
 	Deduplication               *bool
 	BookieAffinityGroup         *v1alpha1.BookieAffinityGroupData
+	TopicAutoCreationConfig     *v1alpha1.TopicAutoCreationConfig
 }
 
 // TopicParams indicates the parameters for creating a topic

pkg/connection/reconcile_namespace.go

@@ -164,6 +164,7 @@ func (r *PulsarNamespaceReconciler) ReconcileNamespace(ctx context.Context, puls
 		OffloadThresholdSize:        namespace.Spec.OffloadThresholdSize,
 		Deduplication:               namespace.Spec.Deduplication,
 		BookieAffinityGroup:         namespace.Spec.BookieAffinityGroup,
+		TopicAutoCreationConfig:     namespace.Spec.TopicAutoCreationConfig,
 	}
 
 	if refs := namespace.Spec.GeoReplicationRefs; len(refs) != 0 || len(namespace.Spec.ReplicationClusters) > 0 {

tests/utils/spec.go

@@ -23,6 +23,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/utils/pointer"
+	"k8s.io/utils/ptr"
 
 	"github.com/streamnative/pulsar-resources-operator/api/v1alpha1"
 	rsutils "github.com/streamnative/pulsar-resources-operator/pkg/utils"
@@ -81,6 +82,11 @@ func MakePulsarNamespace(namespace, name, namespaceName, connectionName string,
 			BacklogQuotaLimitSize: &backlogSize,
 			Bundles:               &bundle,
 			MessageTTL:            ttl,
+			TopicAutoCreationConfig: &v1alpha1.TopicAutoCreationConfig{
+				Allow:      true,
+				Type:       "partitioned",
+				Partitions: ptr.To[int32](10),
+			},
 		},
 	}
 }