Use ModifyCluster with an Amazon SDK or CLI

Associate a Security Group with a ClusterThis example shows how to associate a cluster security group with the specified cluster.Command:

aws redshift modify-cluster --cluster-identifier mycluster --cluster-security-groups mysecuritygroup

Modify the Maintenance Window for a ClusterThis shows how to change the weekly preferred maintenance window for a cluster to be the minimum four hour window starting Sundays at 11:15 PM, and ending Mondays at 3:15 AM.Command:

aws redshift modify-cluster --cluster-identifier mycluster --preferred-maintenance-window Sun:23:15-Mon:03:15

Change the Master Password for the ClusterThis example shows how to change the master password for a cluster.Command:

aws redshift modify-cluster --cluster-identifier mycluster --master-user-password A1b2c3d4

import (
	"context"
	"errors"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/redshift"
	"github.com/aws/aws-sdk-go-v2/service/redshift/types"
)



// RedshiftActions wraps Redshift service actions.
type RedshiftActions struct {
	RedshiftClient *redshift.Client
}



// ModifyCluster sets the preferred maintenance window for the given cluster.
func (actor RedshiftActions) ModifyCluster(ctx context.Context, clusterId string, maintenanceWindow string) *redshift.ModifyClusterOutput {
	// Modify the cluster's maintenance window
	input := &redshift.ModifyClusterInput{
		ClusterIdentifier:          aws.String(clusterId),
		PreferredMaintenanceWindow: aws.String(maintenanceWindow),
	}

	var opErr *types.InvalidClusterStateFault
	output, err := actor.RedshiftClient.ModifyCluster(ctx, input)
	if err != nil && errors.As(err, &opErr) {
		log.Println("Cluster is in an invalid state.")
		panic(err)
	} else if err != nil {
		log.Printf("Failed to modify Redshift cluster: %v\n", err)
		panic(err)
	}

	log.Printf("The cluster was successfully modified and now has %s as the maintenance window\n", *output.Cluster.PreferredMaintenanceWindow)
	return output
}

Modify a cluster.

    /**
     * Modifies an Amazon Redshift cluster asynchronously.
     *
     * @param clusterId the identifier of the cluster to be modified
     * @return a {@link CompletableFuture} that completes when the cluster modification is complete
     */
    public CompletableFuture<ModifyClusterResponse> modifyClusterAsync(String clusterId) {
        ModifyClusterRequest modifyClusterRequest = ModifyClusterRequest.builder()
            .clusterIdentifier(clusterId)
            .preferredMaintenanceWindow("wed:07:30-wed:08:00")
            .build();

        return getAsyncClient().modifyCluster(modifyClusterRequest)
            .whenComplete((clusterResponse, exception) -> {
                if (exception != null) {
                    if (exception.getCause() instanceof RedshiftException) {
                        logger.info("Error: {} ", exception.getMessage());
                    } else {
                        logger.info("Unexpected error: {} ", exception.getMessage());
                    }
                } else {
                    logger.info("The modified cluster was successfully modified and has "
                        + clusterResponse.cluster().preferredMaintenanceWindow() + " as the maintenance window");
                }
            });
    }

Create the client.

import { RedshiftClient } from "@aws-sdk/client-redshift";
// Set the AWS Region.
const REGION = "REGION";
//Set the Redshift Service Object
const redshiftClient = new RedshiftClient({ region: REGION });
export { redshiftClient };

Modify a cluster.

// Import required AWS SDK clients and commands for Node.js
import { ModifyClusterCommand } from "@aws-sdk/client-redshift";
import { redshiftClient } from "./libs/redshiftClient.js";

// Set the parameters
const params = {
  ClusterIdentifier: "CLUSTER_NAME",
  MasterUserPassword: "NEW_MASTER_USER_PASSWORD",
};

const run = async () => {
  try {
    const data = await redshiftClient.send(new ModifyClusterCommand(params));
    console.log("Success was modified.", data);
    return data; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
run();

Modify a cluster.

suspend fun modifyCluster(clusterId: String?) {
    val modifyClusterRequest =
        ModifyClusterRequest {
            clusterIdentifier = clusterId
            preferredMaintenanceWindow = "wed:07:30-wed:08:00"
        }

    RedshiftClient { region = "us-west-2" }.use { redshiftClient ->
        val clusterResponse = redshiftClient.modifyCluster(modifyClusterRequest)
        println(
            "The modified cluster was successfully modified and has ${clusterResponse.cluster?.preferredMaintenanceWindow} as the maintenance window",
        )
    }
}

class RedshiftWrapper:
    """
    Encapsulates Amazon Redshift cluster operations.
    """

    def __init__(self, redshift_client):
        """
        :param redshift_client: A Boto3 Redshift client.
        """
        self.client = redshift_client


    def modify_cluster(self, cluster_identifier, preferred_maintenance_window):
        """
        Modifies a cluster.

        :param cluster_identifier: The cluster identifier.
        :param preferred_maintenance_window: The preferred maintenance window.
        """
        try:
            self.client.modify_cluster(
                ClusterIdentifier=cluster_identifier,
                PreferredMaintenanceWindow=preferred_maintenance_window,
            )
        except ClientError as err:
            logging.error(
                "Couldn't modify a cluster. Here's why: %s: %s",
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise

The following code instantiates the RedshiftWrapper object.

    client = boto3.client("redshift")
    redhift_wrapper = RedshiftWrapper(client)