Cannot create Aurora Postgres Serverless Database

I get the error:

The engine mode serverless you requested is currently unavailable.

Reproduction Steps

const database = new CfnDBCluster(construct, 'aurora', {
	databaseName: 'anydatabasename',
	dbClusterIdentifier: environmentPrefix(),
	engine: 'aurora-postgresql',
	engineMode: 'serverless',
	masterUsername: 'admin',
	masterUserPassword: 'admin',
	port: 5432,
	dbSubnetGroupName: subnetGroup.dbSubnetGroupName, // Created previously
	scalingConfiguration: {
		autoPause: true,
		maxCapacity: 1,
		minCapacity: 1,

		// Fifteen minutes should be enough
		secondsUntilAutoPause: 15 * 60,
	},
});

Error Log

1/2 | 5:57:39 PM | UPDATE_FAILED        | AWS::RDS::DBCluster                   | aurora The engine mode serverless you requested is currently unavailable. (Service: AmazonRDS; Status Code: 400; Error Code: InvalidParameterValue; Request ID: 896e55ad-7f9c-4d02-a046-cfeba88e54d6)
	Object.exports.attach ([project directory]/src/aurora.ts:18:19)
	\_ new ApiService ([project directory]/src/index.ts:25:31)
	\_ Object.<anonymous> ([project directory]/src/index.ts:33:1)
	\_ Module._compile (internal/modules/cjs/loader.js:778:30)
	\_ Module.m._compile ([project directory]/node_modules/ts-node/src/index.ts:814:23)
	\_ Module._extensions..js (internal/modules/cjs/loader.js:789:10)
	\_ Object.require.extensions.(anonymous function) [as .ts] ([project directory]/node_modules/ts-node/src/index.ts:817:12)
	\_ Module.load (internal/modules/cjs/loader.js:653:32)
	\_ tryModuleLoad (internal/modules/cjs/loader.js:593:12)
	\_ Function.Module._load (internal/modules/cjs/loader.js:585:3)
	\_ Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
	\_ main ([project directory]/node_modules/ts-node/src/bin.ts:226:14)
	\_ Object.<anonymous> ([project directory]/node_modules/ts-node/src/bin.ts:485:3)
	\_ Module._compile (internal/modules/cjs/loader.js:778:30)
	\_ Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
	\_ Module.load (internal/modules/cjs/loader.js:653:32)
	\_ tryModuleLoad (internal/modules/cjs/loader.js:593:12)
	\_ Function.Module._load (internal/modules/cjs/loader.js:585:3)
	\_ Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
	\_ startup (internal/bootstrap/node.js:283:19)
	\_ bootstrapNodeJSCore (internal/bootstrap/node.js:623:3)

Environment

• CLI Version : 1.22.0
• Framework Version: 1.22.0
• OS : OS X 10.15.2
• Language : Typescript

Other

I saw #3608, but using just aurora as suggested there makes an Aurora MySQL cluster.

I also saw #218, but I think I should be able to do this with CfnDBCluster in the meantime, no?

---

This is 🐛 Bug Report

[moltar]

For anyone who gets here via Google.

You can find if the region has the serverless postgres option via the following command:

aws rds describe-db-engine-versions | jq '.DBEngineVersions[] | select(.SupportedEngineModes != null and .SupportedEngineModes[] == "serverless" and .Engine == "aurora-postgresql")'

Just make sure to run it in the region you want to check.

[jesper-bylund]

@skinny85 yes, just forgot to remove this comment. Sorry about that, and thanks for the follow up!