Add elasticsearch_datadir_volume

Change-Id: Id8276448c6e779b2b4a0aafee45d953c4f009fc1

ansible/group_vars/all.yml

@@ -133,6 +133,7 @@ keepalived_virtual_router_id: "51"
 # Elasticsearch Options
 #######################
 es_heap_size: "1G"
+elasticsearch_datadir_volume: "elasticsearch"
 
 ###################
 # Messaging options

ansible/roles/destroy/tasks/cleanup_host.yml

@@ -5,6 +5,7 @@
   environment:
     enable_haproxy: "{{ enable_haproxy }}"
     enable_swift: "{{ enable_swift }}"
+    elasticsearch_datadir_volume: "{{ elasticsearch_datadir_volume }}"
     glance_file_datadir_volume: "{{ glance_file_datadir_volume }}"
     nova_instance_datadir_volume: "{{ nova_instance_datadir_volume }}"
     gnocchi_metric_datadir_volume: "{{ gnocchi_metric_datadir_volume }}"

ansible/roles/elasticsearch/defaults/main.yml

@@ -12,7 +12,7 @@ elasticsearch_services:
     volumes:
       - "{{ node_config_directory }}/elasticsearch/:{{ container_config_directory }}/"
       - "/etc/localtime:/etc/localtime:ro"
-      - "elasticsearch:/var/lib/elasticsearch/data"
+      - "{{ elasticsearch_datadir_volume }}:/var/lib/elasticsearch/data"
     dimensions: "{{ elasticsearch_dimensions }}"
     haproxy:
       elasticsearch:

doc/source/reference/logging-and-monitoring/central-logging-guide.rst

@@ -31,6 +31,10 @@ By default Elasticsearch is deployed on port ``9200``.
    Elasticsearch stores a lot of logs, so if you are running centralized logging,
    remember to give ``/var/lib/docker`` an adequate space.
 
+   Alternatively it is possible to use a local directory instead of the volume
+   ``elasticsearch`` to store the data of Elasticsearch. The path can be set via
+   the variable ``elasticsearch_datadir_volume``.
+
 Kibana
 ~~~~~~
 

tools/cleanup-host

@@ -61,6 +61,11 @@ if [[ "$nova_instance_datadir_volume" != "nova_compute" && -d "$nova_instance_da
     rm -rfv  $nova_instance_datadir_volume
 fi
 
+if [[ "$elasticsearch_datadir_volume" != "elasticsearch" && -d "$elasticsearch_datadir_volume" ]]; then
+    echo "Removing elasticsearch volume if it is customzied"
+    rm -rfv  $elasticsearch_datadir_volume
+fi
+
 if [[ "$gnocchi_metric_datadir_volume" != "gnocchi" && -d "$gnocchi_metric_datadir_volume" ]]; then
     echo "Removing gnocchi volume if it is customzied"
     rm -rfv  $gnocchi_metric_datadir_volume