Hey all!

I'm using localstack for a project where I consume data from kinesis, process it and put it in elasticsearch.

In the later versions of localstack 'elasticsearch' was removed and is now lazily loaded after call to es::CreateElasticsearchDomain (at least that's how I understand it from #1881, #1865, #1870).

I'm running localstack in a docker using testcontainers (which gives me dynamic port mappings etc). My processing code is running on localhost.

The problem I'm facing now is that the response from es::CreateElasticsearchDomain returns an elasticsearch endpoint like: http://[docker container id]:port.
With my set up, this gives me two issues:
1. [docker container id] host is not (I believe) reachable from localhost unless I add it to /etc/hosts or something like that. I can surely "hack" my way around this by just replacing [docker container id] with localhost.
2. It says here: https://github.com/localstack/localstack/issues/1881#issuecomment-567495056 that we should not assume that elasticsearch will run on a static port in the future. When running localstack in a docker, how would I know which port to expose then in order to reach elasticsearch from localhost?

I currently have my tests running using 1.10.7 but there I just make a dummy call to es::CreateElasticsearchDomain and hardcode elasticsearch endpoint to http://localhost:4571. (It seems like it always chooses 4571 as of now?)

Thanks
Stefan
if not message:
        if error_type == 'ResourceNotFoundException':
            message = 'Resource not found.'
        elif error_type == 'ResourceAlreadyExistsException':
            message = 'Resource already exists.'
    response = make_response(jsonify({'error': message}))
    response.headers['x-amzn-errortype'] = error_type
    return response, code
def get_domain_config_status():
    return {
        'CreationDate': '%.2f' % time.time(),
        'PendingDeletion': False,
        'State': 'Active',
        'UpdateDate': '%.2f' % time.time(),
        'UpdateVersion': randint(1, 100)
    }
def get_domain_config(domain_name):