dynamodb-local | A wrapper for AWS DynamoDB Local , intended for use | AWS library

The above code worked fine for me. Sometimes you need to be sure there is a region set, even though you are setting a ServiceUrl.

You can use https://github.com/marketplace/actions/start-dynamodb-in-github-actions in your workflow:

I have used this for local testing with Jest (https://github.com/shelfio/jest-dynamodb). For mocking in unit tests for code that interfaces with DynamoDB it works wonderfully. Very easy to provision tables and indices for testing purposes.

There are some important caveats to keep in mind (AWS lists them here: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DynamoDBLocal.UsageNotes.html), and IAM policies aren't really going to work as you aren't running on AWS infrastructure.

I suspect that your problem is in here:

The Compose samples in the AWS docs look like the image is configured with ENTRYPOINT ["java"], so you have to start the options (the command string) with -jar DynamoDBLocal.jar to tell the JVM what to run.

As described in this issue, removing and re-installing serverless solved the problem for me:

It looks like my issue was that I was assuming this would be exposed on port 8000 for localhost. Instead it needed to be linked to the dynamo docker container. In the yml file for the python docker compose I needed to add the following:

The key to make it work is to use the -sharedDB flag, as detailed here.

Unfortunately, adding only that one key would cause container to exit right after start, I believe the reason is that by providing one flag it overwrites all the standard ones.

To obviate the problem I just supply all the standard ones and it works:

The parameter --global-secondary-index-updates should be a valid JSON string, which it is not in your case. It is also missing a mandatory key, ProvisionedThroughput.

https://docs.aws.amazon.com/cli/latest/reference/dynamodb/update-table.html

Here goes: