Use DescribeDBInstances with an Amazon SDK or CLI

    /// <summary>
    /// Returns a list of DB instances.
    /// </summary>
    /// <param name="dbInstanceIdentifier">Optional name of a specific DB instance.</param>
    /// <returns>List of DB instances.</returns>
    public async Task<List<DBInstance>> DescribeDBInstances(string dbInstanceIdentifier = null)
    {
        var results = new List<DBInstance>();
        var instancesPaginator = _amazonRDS.Paginators.DescribeDBInstances(
            new DescribeDBInstancesRequest
            {
                DBInstanceIdentifier = dbInstanceIdentifier
            });
        // Get the entire list using the paginator.
        await foreach (var instances in instancesPaginator.DBInstances)
        {
            results.Add(instances);
        }
        return results;
    }

        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";

    Aws::RDS::RDSClient client(clientConfig);


//! Routine which gets a DB instance description.
/*!
 \sa describeDBInstance()
 \param dbInstanceIdentifier: A DB instance identifier.
 \param instanceResult: The 'DBInstance' object containing the description.
 \param client: 'RDSClient' instance.
 \return bool: Successful completion.
 */
bool AwsDoc::RDS::describeDBInstance(const Aws::String &dbInstanceIdentifier,
                                     Aws::RDS::Model::DBInstance &instanceResult,
                                     const Aws::RDS::RDSClient &client) {
    Aws::RDS::Model::DescribeDBInstancesRequest request;
    request.SetDBInstanceIdentifier(dbInstanceIdentifier);

    Aws::RDS::Model::DescribeDBInstancesOutcome outcome =
            client.DescribeDBInstances(request);

    bool result = true;
    if (outcome.IsSuccess()) {
        instanceResult = outcome.GetResult().GetDBInstances()[0];
    }
    else if (outcome.GetError().GetErrorType() !=
             Aws::RDS::RDSErrors::D_B_INSTANCE_NOT_FOUND_FAULT) {
        result = false;
        std::cerr << "Error with RDS::DescribeDBInstances. "
                  << outcome.GetError().GetMessage()
                  << std::endl;
    }
        // This example does not log an error if the DB instance does not exist.
        // Instead, instanceResult is set to empty.
    else {
        instanceResult = Aws::RDS::Model::DBInstance();
    }

    return result;
}

To describe a DB instance

The following describe-db-instances example retrieves details about the specified DB instance.

aws rds describe-db-instances \
    --db-instance-identifier mydbinstancecf

Output:

{
    "DBInstances": [
        {
            "DBInstanceIdentifier": "mydbinstancecf",
            "DBInstanceClass": "db.t3.small",
            "Engine": "mysql",
            "DBInstanceStatus": "available",
            "MasterUsername": "masterawsuser",
            "Endpoint": {
                "Address": "mydbinstancecf.abcexample.us-east-1.rds.amazonaws.com",
                "Port": 3306,
                "HostedZoneId": "Z2R2ITUGPM61AM"
            },
            ...some output truncated...
        }
    ]
}

type DbInstances struct {
	RdsClient *rds.Client
}



// GetInstance gets data about a DB instance.
func (instances *DbInstances) GetInstance(instanceName string) (
	*types.DBInstance, error) {
	output, err := instances.RdsClient.DescribeDBInstances(context.TODO(),
		&rds.DescribeDBInstancesInput{
			DBInstanceIdentifier: aws.String(instanceName),
		})
	if err != nil {
		var notFoundError *types.DBInstanceNotFoundFault
		if errors.As(err, &notFoundError) {
			log.Printf("DB instance %v does not exist.\n", instanceName)
			err = nil
		} else {
			log.Printf("Couldn't get instance %v: %v\n", instanceName, err)
		}
		return nil, err
	} else {
		return &output.DBInstances[0], nil
	}
}

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.rds.RdsClient;
import software.amazon.awssdk.services.rds.model.DescribeDbInstancesResponse;
import software.amazon.awssdk.services.rds.model.DBInstance;
import software.amazon.awssdk.services.rds.model.RdsException;
import java.util.List;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class DescribeDBInstances {

    public static void main(String[] args) {
        Region region = Region.US_EAST_1;
        RdsClient rdsClient = RdsClient.builder()
                .region(region)
                .build();

        describeInstances(rdsClient);
        rdsClient.close();
    }

    public static void describeInstances(RdsClient rdsClient) {
        try {
            DescribeDbInstancesResponse response = rdsClient.describeDBInstances();
            List<DBInstance> instanceList = response.dbInstances();
            for (DBInstance instance : instanceList) {
                System.out.println("Instance ARN is: " + instance.dbInstanceArn());
                System.out.println("The Engine is " + instance.engine());
                System.out.println("Connection endpoint is" + instance.endpoint().address());
            }

        } catch (RdsException e) {
            System.out.println(e.getLocalizedMessage());
            System.exit(1);
        }
    }
}

suspend fun describeInstances() {

    RdsClient { region = "us-west-2" }.use { rdsClient ->
        val response = rdsClient.describeDbInstances(DescribeDbInstancesRequest {})
        response.dbInstances?.forEach { instance ->
            println("Instance Identifier is ${instance.dbInstanceIdentifier}")
            println("The Engine is ${instance.engine}")
            println("Connection endpoint is ${instance.endpoint?.address}")
        }
    }
}

require __DIR__ . '/vendor/autoload.php';

use Aws\Exception\AwsException;


//Create an RDSClient
$rdsClient = new Aws\Rds\RdsClient([
    'region' => 'us-east-2'
]);

try {
    $result = $rdsClient->describeDBInstances();
    foreach ($result['DBInstances'] as $instance) {
        print('<p>DB Identifier: ' . $instance['DBInstanceIdentifier']);
        print('<br />Endpoint: ' . $instance['Endpoint']["Address"]
            . ':' . $instance['Endpoint']["Port"]);
        print('<br />Current Status: ' . $instance["DBInstanceStatus"]);
        print('</p>');
    }
    print(" Raw Result ");
    var_dump($result);
} catch (AwsException $e) {
    echo $e->getMessage();
    echo "\n";
}

class InstanceWrapper:
    """Encapsulates Amazon RDS DB instance actions."""

    def __init__(self, rds_client):
        """
        :param rds_client: A Boto3 Amazon RDS client.
        """
        self.rds_client = rds_client

    @classmethod
    def from_client(cls):
        """
        Instantiates this class from a Boto3 client.
        """
        rds_client = boto3.client("rds")
        return cls(rds_client)


    def get_db_instance(self, instance_id):
        """
        Gets data about a DB instance.

        :param instance_id: The ID of the DB instance to retrieve.
        :return: The retrieved DB instance.
        """
        try:
            response = self.rds_client.describe_db_instances(
                DBInstanceIdentifier=instance_id
            )
            db_inst = response["DBInstances"][0]
        except ClientError as err:
            if err.response["Error"]["Code"] == "DBInstanceNotFound":
                logger.info("Instance %s does not exist.", instance_id)
            else:
                logger.error(
                    "Couldn't get DB instance %s. Here's why: %s: %s",
                    instance_id,
                    err.response["Error"]["Code"],
                    err.response["Error"]["Message"],
                )
                raise
        else:
            return db_inst

require "aws-sdk-rds"  # v2: require 'aws-sdk'

# List all Amazon Relational Database Service (Amazon RDS) DB instances.
#
# @param rds_resource [Aws::RDS::Resource] An SDK for Ruby Amazon RDS resource.
# @return [Array, nil] List of all DB instances, or nil if error.
def list_instances(rds_resource)
  db_instances = []
  rds_resource.db_instances.each do |i|
    db_instances.append({
                          "name": i.id,
                          "status": i.db_instance_status
                        })
  end
  db_instances
rescue Aws::Errors::ServiceError => e
  puts "Couldn't list instances:\n#{e.message}"
end