You need to increase the `vm.max_map_count` kernel setting on your Docker host.
To do this follow the recommended instructions from the Elastic documentation: [Install Elasticsearch with Docker](https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html#docker-cli-run-prod-mode)
## SELinux
On distributions which have SELinux enabled out-of-the-box you will need to either re-context the files or set SELinux into Permissive mode in order for docker-elk to start properly.
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@@ -108,25 +103,7 @@ In the above example the folder `logstash/config` is mapped onto the container `
## How can I tune Elasticsearch configuration?
The Elasticsearch container is using the [shipped configuration](https://github.com/elastic/elasticsearch-docker/blob/master/build/elasticsearch/elasticsearch.yml).
If you want to override the default configuration, create a file `elasticsearch/config/elasticsearch.yml` and add your configuration in it.
Then, you'll need to map your configuration file inside the container in the `docker-compose.yml`. Update the elasticsearch container declaration to:
The Elasticsearch configuration is stored in `elasticsearch/config/elasticsearch.yml`.
You can also specify the options you want to override directly via environment variables:
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@@ -196,7 +173,7 @@ The startup scripts for Elasticsearch and Logstash can append extra JVM options
| Elasticsearch | ES_JAVA_OPTS |
| Logstash | LS_JAVA_OPTS |
To accomodate environments where memory is scarce (Docker for Mac has only 2 GB available by default), the Heap Size allocation is capped by default to 256MB per service within the `docker-compose.yml` file. If you want to override the default JVM configuration, edit the matching environment variable(s) in the `docker-compose.yml` file.
To accomodate environments where memory is scarce (Docker for Mac has only 2 GB available by default), the Heap Size allocation is capped by default to 256MB per service in the `docker-compose.yml` file. If you want to override the default JVM configuration, edit the matching environment variable(s) in the `docker-compose.yml` file.
For example, to increase the maximum JVM Heap Size for Logstash:
