container immediately exits

[d3netxer]

When I try to run a container using this command as listed in the documentation (https://hub.docker.com/_/geonetwork):

$ docker run --name some-geonetwork -d -p 8080:8080 geonetwork

The container immediately exists. Isn't it supposed to stay up?

[d3netxer]

Is it possible that GeoNetwork requires an Elasticsearch instance?

when I try to look at the logs, this is the output:

$ docker logs some-geonetwork
********************************************************************
WARNING: Environment variable ES_HOST is mandatory

GeoNetwork requires an Elasticsearch instance to store the index.
Please define the variable ES_HOST with the Elasticsearch 
host name. For example

docker run -e ES_HOST=elasticsearch geonetwork:4.0.5

********************************************************************

I do not see anything about Elasticsearch in the documentation

[juanluisrp]

GN requires ES in versions >= 4. Previous versions don't.

You can find some samples of docker-compose configuration files here: https://github.com/geonetwork/docker-geonetwork/blob/main/4.0.5/docker-compose.yml