Django: Elastic Beanstalk - cannot create new RDS

Question

I used eb-create in the EB CLI to spin up a new application environment. However, when I tried to create a new database, it required me to select at least at least two availability zones from a list of four.

No matter which two I selected it would stop me with an error using the following language:

DBSubnets: Invalid option value [...] Specify the VPC ID and make sure all subnets exist.

I tried enabling the same options in the VPC configuration, but I was told this couldn't be done on an existing environment. It took me a while to find the answer, so I am posting it here.

Answer 1

The following EB CLI command properly initiated my environment and resulted in successful deployment of my application:

eb create --database.engine postgres

There are a few other settings you can provide from here as well. Please refer to the docs for additional assistance.