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?

Volumes have two parts: your local directory, and the container directory. You are trying to mount a relative path to a file to an unspecified volume; not sure what you are expecting docker to do there. You might want to read the documentation for docker, docker-compose and the readme for the official elasticsearch docker containers that should explain this pretty well. — Jilles van Gurp, Apr 10 '18 at 11:25

score 9 · Accepted Answer · answered Apr 10 '18 at 11:29

9

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

answered Apr 10 '18 at 11:29

Shoan

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How could be this applied to Windows 10? The path and all that stuff – chomp May 08 '18 at 15:49
@chomp The left side of the ':' is the relative location of the path of the yml file. The right side should remain constant. – Shoan May 09 '18 at 12:40
Is that `:ro` at the end a typo? – Noumenon Aug 25 '21 at 00:19
At the time I wrote the answer, it wasn't a typo. The `:ro` at the end allows for the path to be mounted as read-only. – Shoan Aug 25 '21 at 10:07

Davide Fiocco · Answer 2 · 2018-04-10T13:56:49.767

7

One workaround to perform that (trivial) modification to elasticsearch.yml in the container is to modify directly a relevant Dockerfile with the syntax

USER root
RUN echo "indices.query.bool.max_clause_count: 1000000" >> /usr/share/elasticsearch/config/elasticsearch.yml

so to append the desired custom value.

edited Apr 10 '18 at 13:56

answered Apr 10 '18 at 13:42

Davide Fiocco

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

2 Answers2

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