Elasticsearch pytest oneliner in the docs is no longer working

[ml-evs]

I've just tried running

docker run -d --name elasticsearch_test -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e "xpack.security.enabled=false" elasticsearch:7.17.1 \
&& sleep 10 \
&& OPTIMADE_DATABASE_BACKEND="elastic" py.test tests/server/; \
docker container stop elasticsearch_test; docker container rm elasticsearch_test

from our docs, and I'm getting connection errors:

E   elasticsearch.exceptions.ConnectionError: ConnectionError(('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))) caused by: ProtocolError(('Connection aborted.', RemoteDisconnected('Remote end closed connection without response')))

probably just needs a tweak to make sure the right ports etc are exposed from the v7 ES image.

[JPBergsma]

With sudo docker run -p 127.0.0.1:9200:9200 -p 127.0.0.1:9300:9300 -e "discovery.type=single-node" -e "xpack.security.enabled=false" elasticsearch:7.17.7

I do get a working instance of elastic search on docker. I can run the test on elastic search from pycharm.

[JPBergsma]

This set seems to do the same as our original. I could not execute it without sudo or as one command. But if I remember correctly, I also had problems with this previously. (the first two lines are one command, but it gets broken in two because it does not fit.)
sudo docker run --rm -d --name elastic_test -p 127.0.0.1:9200:9200 -p 127.0.0.1:9300:9300 -e "discovery.type=single-node" elasticsearch:7.17.7
sleep 20
OPTIMADE_DATABASE_BACKEND="elastic" py.test
sudo docker stop elastic_test

[ml-evs]

After the changes in #1373 the line in the docs now works for me (with the bump to 7.17.7).