将 AWS Lambda 与 Aurora Serverless 相结合

Question

Is it possible to access Aurora Serverless DB from AWS Lambda?

In my case I have a Flutter mobile application which is communicating with Lumen micro framework through RESTful API. For DB I use MySQL.

After creating AWS Aurora cluster, can I connect to it like to a normal MySQL DB connection?

DB_CONNECTION=mysql
DB_HOST=my.awshost.com
DB_PORT=3306
DB_DATABASE=homestead
DB_USERNAME=homestead
DB_PASSWORD=secret

I am relatively new to AWS. I've been only using EC2 so far. Therefore, I am trying to getting more familiar with Serverless concept.

Any help is appreciated.

Answer 1

Yes, you can access like other service but there is limitation of Serverless DB, it can only accessible within VPC, so you should define Lambda in the same VPC and configure networking.

Limitations of Aurora Serverless

• Aurora with MySQL version 5.6 compatibility

• Aurora with PostgreSQL version 10.7 compatibility

• The port number for connections must be:

3306 for Aurora MySQL

5432 for Aurora PostgreSQL

• You can't give an Aurora Serverless DB cluster a public IP address. You can access an Aurora Serverless DB cluster only from within a virtual private cloud (VPC) based on the Amazon VPC service.

• Each Aurora Serverless DB cluster requires two AWS PrivateLink endpoints. If you reach the limit for PrivateLink endpoints within your VPC, you can't create any more Aurora Serverless clusters in that VPC. For information about checking and changing the limits on endpoints within a VPC, see Amazon VPC Limits.

• You can't access an Aurora Serverless DB cluster's endpoint through an AWS VPN connection or an inter-region VPC peering connection.

aurora-serverless

You can explore getting-started-with-the-amazon-aurora-serverless-data-api for configuration lambda with Serverless DB.

Answer 2

Hi I'm also quite new on AWS. I have a lambda function using sqlalchemy and alembic to connect to a postgre database. Locally I connect to the db using these params in a.env file: RS_POSTGRES_USER
RS_POSTGRES_PASSWORD
RS_POSTGRES_PORT
RS_POSTGRES_HOST
RS_POSTGRES_DB

I have created an Aurora serverless RDS, but not using dataAPI. Both RDS and lambda are deployed in the same VPC (same subnets and security group). Any other things to do (VPC, IAM role), to make sure my lambda can connect to my DB? For now I have a timeout error.

Thanks.

Edouard