DBClusterParameterGroup not found: default.aurora5.6

Describe the bug My DatabaseCluster ist configured with engine: rds.DatabaseClusterEngine.AuroraMysql and no custom ClusterParameterGroup is configured.

The following Exception is thrown:

DBClusterParameterGroup not found: default.aurora5.6 (Service: AmazonRDS; Status Code: 404; Error Code: DBClusterParameterGroupNotFound;

To Reproduce

        new rds.DatabaseCluster(this, 'prodRdsCuster', {
            clusterIdentifier: 'rds-prod',
            engine: rds.DatabaseClusterEngine.AuroraMysql,
            instances: 1,
            port: 3306,
            defaultDatabaseName: 'app',
            masterUser: {
                username: 'admin'
            },
            instanceProps: {
                instanceType: new ec2.InstanceTypePair(ec2.InstanceClass.Burstable2, ec2.InstanceSize.Medium),
                securityGroup: rdsSecurityGroup,
                vpc: props.vpc,
                vpcSubnets: {
                    subnetType: ec2.SubnetType.Isolated,
                }
            },
            backup: {
                preferredWindow: '02:00-03:00',
                retentionDays: 21
            },
            preferredMaintenanceWindow: 'Sun:03:00-Sun:04:00'
        });

cdk deploy

Expected behavior Successful deployment

Version:

• OS: MacOS Moave
• Programming Language: TypeScript
• CDK Version: 0.31.0

Workaround Create a ClusterParameterGroup with explicit family setting:

const rdsClusterPrameterGroup = new ClusterParameterGroup(this, 'rdsClusterPrameterGroup', {
            description: 'MySQL 5.7',
            family: 'aurora-mysql5.7'
}

and use it in your cluster with

parameterGroup: rdsClusterPrameterGroup

[jogold]

Also already experienced this.

I think this is a bug in RDS. The problem is that the default.xxx parameter groups (created by AWS) are created only after creating a instance/cluster in the console or using the API directly. So if you never created a instance/cluster this way in a region and you try to deploy with CloudFormation it will not find the default.xxx parameter group.

[joehillen]

@jogold Incorrect. I just launched a cluster with a default parameter group

    this.db = new DatabaseCluster(this, "Database", {
      engine: rds.DatabaseClusterEngine.AuroraPostgresql,
      engineVersion: "10.7",
      masterUser: {
        username: "admin",
      },
      defaultDatabaseName: "main",
      instanceProps: {
        instanceType: new ec2.InstanceType("r5.large"),
        vpcSubnets: {
          subnetType: ec2.SubnetType.Private,
        },
        vpc,
      },
      storageEncrypted: true,
      parameterGroup: {
        parameterGroupName: "default.aurora-postgresql10",
      } as any,
    });

Note: The engineVersion props comes from my PR https://github.com/awslabs/aws-cdk/pull/2698