Add extensionpoint to docker-entrypoint.sh

[sebglon]

Add scan folder docker-entrypoint-initels.d to extend container before every start up CMD
show #85

[czerasz]

This would be very useful. For example for adding templates or creating indexes with a specific mapping.

[tianon]

I think the discussion in docker-library/mongo#53 is very relevant here.

[tianon]

Arg, I linked to the wrong discussion, sorry. 😞

Relevant comments/discussion:

• Initialization script  cassandra#31 (comment)
• Add /docker-entrypoint-initdb.d customization hooks rabbitmq#53 (comment)

[yosifkit]

My thought for this one specifically is why not just end my custom script with exec /docker-entrypoint.sh elasticsearch and then run my container with the following:

$ docker run -d -v /custom/script.sh:/custom-script.sh elasticsearch /custom-script.sh

The only thing we miss inheriting from the entrypoint into our script is the chown beforehand and the stepdown from root, which could be a bonus. If we really want to not be root, we can just add --user elasticsearch to the docker run and we get basically the same setup as the PR.

The reason I bring this up is that docker-entrypoint-initdb.d exists in images like postgres to let you do things that can only be done after the database files are initialized and while the database is running. Whereas I don't see that in this PR, since elasticsearch is not running and doesn't require initialization.

For example, I can do the following and have my plugin in the resulting image:

FROM elasticsearch
RUN plugin -i elasticsearch/marvel/latest

[mi-hol]

@sebglon I wonder if @yosifkit proposed solution solved your issue? In case it did this could be closed :)

[zerthimon]

So, what @yosifkit proposed actually works well.
I've made this little custom script to install x-pack

#!/bin/bash

# install x-pack if not yet installed
if ! bin/elasticsearch-plugin list | grep -qs x-pack; then
   yes | bin/elasticsearch-plugin install x-pack
fi

# run elastic
exec /docker-entrypoint.sh elasticsearch "$@"

[kdh6429]

I would like to set templates from docker-compose, and to do this, it require elasticsearch running. Therefore I think this merge is still necessary to do like setting template or index.

[yosifkit]

Closing since the repo is being deprecated. See discussion on #160 for more information.

This image is officially deprecated in favor of the elasticsearch image provided by elastic.co which is available to pull via docker.elastic.co/elasticsearch/elasticsearch:[version] like 5.2.1. This image will receive no further updates after 2017-06-20 (June 20, 2017). Please adjust your usage accordingly.

Elastic provides open-source support for Elasticsearch via the elastic/elasticsearch GitHub repository and the Docker image via the elastic/elasticsearch-docker GitHub repository, as well as community support via its forums.