Update a Kafka cluster

Update a Kafka cluster

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For detailed documentation that includes this code sample, see the following:

Code sample

Go

Before trying this sample, follow the Go setup instructions in the Managed Service for Apache Kafka quickstart using client libraries. For more information, see the Managed Service for Apache Kafka Go API reference documentation.

To authenticate to Managed Service for Apache Kafka, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/managedkafka/apiv1/managedkafkapb"
	"google.golang.org/api/option"
	"google.golang.org/protobuf/types/known/fieldmaskpb"

	managedkafka "cloud.google.com/go/managedkafka/apiv1"
)

func updateCluster(w io.Writer, projectID, region, clusterID string, memory int64, opts ...option.ClientOption) error {
	// projectID := "my-project-id"
	// region := "us-central1"
	// clusterID := "my-cluster"
	// memoryBytes := 4221225472
	ctx := context.Background()
	client, err := managedkafka.NewClient(ctx, opts...)
	if err != nil {
		return fmt.Errorf("managedkafka.NewClient got err: %w", err)
	}
	defer client.Close()

	clusterPath := fmt.Sprintf("projects/%s/locations/%s/clusters/%s", projectID, region, clusterID)
	capacityConfig := &managedkafkapb.CapacityConfig{
		MemoryBytes: memory,
	}
	cluster := &managedkafkapb.Cluster{
		Name:           clusterPath,
		CapacityConfig: capacityConfig,
	}
	paths := []string{"capacity_config.memory_bytes"}
	updateMask := &fieldmaskpb.FieldMask{
		Paths: paths,
	}

	req := &managedkafkapb.UpdateClusterRequest{
		UpdateMask: updateMask,
		Cluster:    cluster,
	}
	op, err := client.UpdateCluster(ctx, req)
	if err != nil {
		return fmt.Errorf("client.UpdateCluster got err: %w", err)
	}
	resp, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("op.Wait got err: %w", err)
	}
	fmt.Fprintf(w, "Updated cluster: %#v\n", resp)
	return nil
}

Java

Before trying this sample, follow the Java setup instructions in the Managed Service for Apache Kafka quickstart using client libraries. For more information, see the Managed Service for Apache Kafka Java API reference documentation.

To authenticate to Managed Service for Apache Kafka, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 


import com.google.api.gax.longrunning.OperationFuture;
import com.google.api.gax.longrunning.OperationSnapshot;
import com.google.api.gax.longrunning.OperationTimedPollAlgorithm;
import com.google.api.gax.retrying.RetrySettings;
import com.google.api.gax.retrying.TimedRetryAlgorithm;
import com.google.cloud.managedkafka.v1.CapacityConfig;
import com.google.cloud.managedkafka.v1.Cluster;
import com.google.cloud.managedkafka.v1.ClusterName;
import com.google.cloud.managedkafka.v1.ManagedKafkaClient;
import com.google.cloud.managedkafka.v1.ManagedKafkaSettings;
import com.google.cloud.managedkafka.v1.OperationMetadata;
import com.google.cloud.managedkafka.v1.UpdateClusterRequest;
import com.google.protobuf.FieldMask;
import java.time.Duration;
import java.util.concurrent.ExecutionException;

public class UpdateCluster {

  public static void main(String[] args) throws Exception {
    // TODO(developer): Replace these variables before running the example.
    String projectId = "my-project-id";
    String region = "my-region"; // e.g. us-east1
    String clusterId = "my-cluster";
    long memoryBytes = 4221225472L; // 4 GiB
    updateCluster(projectId, region, clusterId, memoryBytes);
  }

  public static void updateCluster(
      String projectId, String region, String clusterId, long memoryBytes) throws Exception {
    CapacityConfig capacityConfig = CapacityConfig.newBuilder().setMemoryBytes(memoryBytes).build();
    Cluster cluster =
        Cluster.newBuilder()
            .setName(ClusterName.of(projectId, region, clusterId).toString())
            .setCapacityConfig(capacityConfig)
            .build();
    FieldMask updateMask = FieldMask.newBuilder().addPaths("capacity_config.memory_bytes").build();

    // Create the settings to configure the timeout for polling operations
    ManagedKafkaSettings.Builder settingsBuilder = ManagedKafkaSettings.newBuilder();
    TimedRetryAlgorithm timedRetryAlgorithm = OperationTimedPollAlgorithm.create(
        RetrySettings.newBuilder()
            .setTotalTimeoutDuration(Duration.ofHours(1L))
            .build());
    settingsBuilder.updateClusterOperationSettings()
        .setPollingAlgorithm(timedRetryAlgorithm);

    try (ManagedKafkaClient managedKafkaClient = ManagedKafkaClient.create(
        settingsBuilder.build())) {
      UpdateClusterRequest request =
          UpdateClusterRequest.newBuilder().setUpdateMask(updateMask).setCluster(cluster).build();
      OperationFuture<Cluster, OperationMetadata> future =
          managedKafkaClient.updateClusterOperationCallable().futureCall(request);

      // Get the initial LRO and print details. CreateCluster contains sample code for polling logs.
      OperationSnapshot operation = future.getInitialFuture().get();
      System.out.printf("Cluster update started. Operation name: %s\nDone: %s\nMetadata: %s\n",
          operation.getName(),
          operation.isDone(),
          future.getMetadata().get().toString());

      Cluster response = future.get();
      System.out.printf("Updated cluster: %s\n", response.getName());
    } catch (ExecutionException e) {
      System.err.printf("managedKafkaClient.updateCluster got err: %s", e.getMessage());
    }
  }
}

Python

Before trying this sample, follow the Python setup instructions in the Managed Service for Apache Kafka quickstart using client libraries. For more information, see the Managed Service for Apache Kafka Python API reference documentation.

To authenticate to Managed Service for Apache Kafka, set up Application Default Credentials. For more information, see Set up authentication for a local development environment. 

from google.api_core.exceptions import GoogleAPICallError
from google.cloud import managedkafka_v1
from google.protobuf import field_mask_pb2

# TODO(developer)
# project_id = "my-project-id"
# region = "us-central1"
# cluster_id = "my-cluster"
# memory_bytes = 4295000000

client = managedkafka_v1.ManagedKafkaClient()

cluster = managedkafka_v1.Cluster()
cluster.name = client.cluster_path(project_id, region, cluster_id)
cluster.capacity_config.memory_bytes = memory_bytes
update_mask = field_mask_pb2.FieldMask()
update_mask.paths.append("capacity_config.memory_bytes")

# For a list of editable fields, one can check https://cloud.google.com/managed-kafka/docs/create-cluster#properties.
request = managedkafka_v1.UpdateClusterRequest(
    update_mask=update_mask,
    cluster=cluster,
)

try:
    operation = client.update_cluster(request=request)
    print(f"Waiting for operation {operation.operation.name} to complete...")
    response = operation.result()
    print("Updated cluster:", response)
except GoogleAPICallError as e:
    print(f"The operation failed with error: {e.message}")

What's next

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