How to install ElasticSeach plugins using docker compose
Here is a blog post by Elastic pertaining to exactly that! You need to use a Dockerfile which executes commands to extend an image. Your Dockerfile will look something like this:
FROM custom_elasticsearch_1
RUN elasticsearch-plugin install royrusso/elasticsearch-HQ
Inspired by @NickPridorozhko's answer, but updated and tested with elasticsearch^7.0.0 (with docker stack / swarm), example with analysis-icu:
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch:7.3.0
user: elasticsearch
command: >
/bin/sh -c "./bin/elasticsearch-plugin list | grep -q analysis-icu
|| ./bin/elasticsearch-plugin install analysis-icu;
/usr/local/bin/docker-entrypoint.sh"
...
The main difference are the updated commands for ^7.0.0, and the use of the docker entrypoint instead of ./bin/elasticsearch (in a stack's context, you'd get an error related to a limit of spawnable processes).