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
article_path = '{}/{}/employee/{}?pretty'.format(
            self.es_url, TEST_INDEX, TEST_DOC_ID)
        resp = requests.get(article_path, headers=COMMON_HEADERS)
        self.assertIn('I like to collect rock albums', resp.text,
            msg='Document not found({}): {}'.format(resp.status_code, resp.text))
    def test_elasticsearch_search(self):
        search_path = '{}/{}/employee/_search?pretty'.format(self.es_url, TEST_INDEX)
        search = {
            'query': {
                'match': {
                    'last_name': 'Smith'
                }
            }
        }
        resp = requests.get(
            search_path,
            data=json.dumps(search),
            headers=COMMON_HEADERS)
        self.assertIn('I like to collect rock albums', resp.text,
            msg='Search failed({}): {}'.format(resp.status_code, resp.text))
    @classmethod
    def _add_document(self, id, document):