How to do a simple edit in elasticsearch.yml in a docker container?

Question

I am using docker-compose as in https://github.com/davidefiocco/dockerized-elasticsearch-indexer/blob/master/docker-compose.yml to initialize a containerized elasticsearch index.
Now, I would like to set a larger value for indices.query.bool.max_clause_count than the default setting using a elasticsearch.yml config file (this is to run some heavy queries as in Elasticsearch - set max_clause_count).

So far I tried to add in the docker-compose.yml a volume with:

services:
   elasticsearch:
      volumes:
        - ./elasticsearch/config/elasticsearch.yml

(and variations thereof) trying to point to a elasticsearch.yml file (that I would like to ship with the rest of the files) with the right max_clause_count setting, but to no avail.

Can someone point me to the right direction?

Answer 1

You can mount the host's directory containing the elasticsearch.yml into the container using

services:
   elasticsearch:
      volumes:
        - path_to/custom_elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml:ro