Persist Elasticsearch data by default via named volume (#430)

* Persist Elasticsearch data by default via named volume

* update volume declaration to long format

* Update README

README.md

@@ -33,6 +33,7 @@ Other available stack variants:
      * [macOS](#macos)
 2. [Usage](#usage)
    * [Bringing up the stack](#bringing-up-the-stack)
+   * [Cleanup](#cleanup)
    * [Initial setup](#initial-setup)
      * [Setting up user authentication](#setting-up-user-authentication)
      * [Injecting data](#injecting-data)
@@ -43,15 +44,13 @@ Other available stack variants:
    * [How to configure Logstash](#how-to-configure-logstash)
    * [How to disable paid features](#how-to-disable-paid-features)
    * [How to scale out the Elasticsearch cluster](#how-to-scale-out-the-elasticsearch-cluster)
-4. [Storage](#storage)
-   * [How to persist Elasticsearch data](#how-to-persist-elasticsearch-data)
-5. [Extensibility](#extensibility)
+4. [Extensibility](#extensibility)
    * [How to add plugins](#how-to-add-plugins)
    * [How to enable the provided extensions](#how-to-enable-the-provided-extensions)
-6. [JVM tuning](#jvm-tuning)
+5. [JVM tuning](#jvm-tuning)
    * [How to specify the amount of memory used by a service](#how-to-specify-the-amount-of-memory-used-by-a-service)
    * [How to enable a remote JMX connection to a service](#how-to-enable-a-remote-jmx-connection-to-a-service)
-7. [Going further](#going-further)
+6. [Going further](#going-further)
    * [Using a newer stack version](#using-a-newer-stack-version)
    * [Plugins and integrations](#plugins-and-integrations)
    * [Swarm mode](#swarm-mode)
@@ -112,6 +111,16 @@ You can also run all services in the background (detached mode) by adding the `-
 
 If you are starting the stack for the very first time, please read the section below attentively.
 
+### Cleanup
+
+Elasticsearch data is persisted inside a volume by default.
+
+In order to entirely shutdown the stack and remove all persisted data, use the following Docker Compose command:
+
+```console
+$ docker-compose down -v
+```
+
 ## Initial setup
 
 ### Setting up user authentication
@@ -240,28 +249,6 @@ settings][trial-license]).
 
 Follow the instructions from the Wiki: [Scaling out Elasticsearch](https://github.com/deviantony/docker-elk/wiki/Elasticsearch-cluster)
 
-## Storage
-
-### How to persist Elasticsearch data
-
-The data stored in Elasticsearch will be persisted after container reboot but not after container removal.
-
-In order to persist Elasticsearch data even after removing the Elasticsearch container, you'll have to mount a volume on
-your Docker host. Update the `elasticsearch` service declaration to:
-
-```yml
-elasticsearch:
-
-  volumes:
-    - /path/to/storage:/usr/share/elasticsearch/data
-```
-
-This will store Elasticsearch data inside `/path/to/storage`.
-
-> :information_source: (Linux users) Beware that the Elasticsearch process runs as the [unprivileged `elasticsearch`
-user][esuser] is used within the Elasticsearch image, therefore the mounted data directory must be writable by the uid
-`1000`.
-
 ## Extensibility
 
 ### How to add plugins

docker-compose.yml

@@ -1,7 +1,6 @@
 version: '3.2'
 
 services:
-
   elasticsearch:
     build:
       context: elasticsearch/
@@ -12,6 +11,9 @@ services:
         source: ./elasticsearch/config/elasticsearch.yml
         target: /usr/share/elasticsearch/config/elasticsearch.yml
         read_only: true
+      - type: volume
+        source: elasticsearch
+        target: /usr/share/elasticsearch/data
     ports:
       - "9200:9200"
       - "9300:9300"
@@ -63,6 +65,8 @@ services:
       - elasticsearch
 
 networks:
-
   elk:
     driver: bridge
+
+volumes:
+  elasticsearch: