Persistance?

[kdomke]

Maybe I am stupid, but every time I restart this, I get an empty database.

Where do I have to add a volume to not loose my data?

[lasat]

You should add a volume to elasticsearch: docker-compose.override.yml

version: '3.5'
services:
  elasticsearch:
    volumes:
      - ./data/es:/usr/share/elasticsearch/data