Docker - ELK - vm.max_map_count

Question

I'm trying to use the docker's image elk-docker (https://elk-docker.readthedocs.io/) , using Docker Compose. The .yml file, is like this:

elk:
image: sebp/elk
ports:
  - "5601:5601"
  - "9200:9200"
  - "5044:5044"

When I run the command: sudo docker-compose up, the console shows:

* Starting Elasticsearch Server
sysctl: setting key "vm.max_map_count": Read-only file system
...fail!
waiting for Elasticsearch to be up (1/30)
waiting for Elasticsearch to be up (2/30)
waiting for Elasticsearch to be up (3/30)
waiting for Elasticsearch to be up (4/30)
waiting for Elasticsearch to be up (5/30)
waiting for Elasticsearch to be up (6/30)
waiting for Elasticsearch to be up (7/30)
waiting for Elasticsearch to be up (8/30)
waiting for Elasticsearch to be up (9/30)
waiting for Elasticsearch to be up (10/30)
waiting for Elasticsearch to be up (11/30)
waiting for Elasticsearch to be up (12/30)
waiting for Elasticsearch to be up (13/30)
waiting for Elasticsearch to be up (14/30)
waiting for Elasticsearch to be up (15/30)
waiting for Elasticsearch to be up (16/30)
waiting for Elasticsearch to be up (17/30)
waiting for Elasticsearch to be up (18/30)
waiting for Elasticsearch to be up (19/30)
waiting for Elasticsearch to be up (20/30)
waiting for Elasticsearch to be up (21/30)
waiting for Elasticsearch to be up (22/30)
waiting for Elasticsearch to be up (23/30)
waiting for Elasticsearch to be up (24/30)
waiting for Elasticsearch to be up (25/30)
waiting for Elasticsearch to be up (26/30)
waiting for Elasticsearch to be up (27/30)
waiting for Elasticsearch to be up (28/30)
waiting for Elasticsearch to be up (29/30)
waiting for Elasticsearch to be up (30/30)
Couln't start Elasticsearch. Exiting.
Elasticsearch log follows below.
cat: /var/log/elasticsearch/elasticsearch.log: No such file or directory
docker_elk_1 exited with code 1

How can I resolve the problem?

Answer 1

You probably need to set vm.max_map_count in /etc/sysctl.conf on the host itself, so that Elasticsearch does not attempt to do that from inside the container. If you don't know the desired value, try doubling the current setting and keep going until Elasticsearch starts successfully. Documentation recommends at least 262144.