Make production volumes point to external storage

docker/docker-compose.prod.yml

@@ -1,13 +1,13 @@
 version: "2.2"
 
-volumes:
-  metadata_data: {}
-  middle_var: {}
-  historical_var: {}
-  broker_var: {}
-  coordinator_var: {}
-  router_var: {}
-  druid_shared: {}
+# volumes:
+#   metadata_data: {}
+#   middle_var: {}
+#   historical_var: {}
+#   broker_var: {}
+#   coordinator_var: {}
+#   router_var: {}
+#   druid_shared: {}
 
 services:
   app:
@@ -84,7 +84,7 @@ services:
     container_name: postgres
     image: postgres:latest
     volumes:
-      - metadata_data:/var/lib/postgresql/data
+      - /block/store/metadata_data:/var/lib/postgresql/data
     environment:
       - POSTGRES_PASSWORD=FoolishPassword
       - POSTGRES_USER=druid
@@ -131,8 +131,10 @@ services:
     image: apache/druid:0.23.0
     container_name: coordinator
     volumes:
-      - druid_shared:/opt/shared
-      - coordinator_var:/opt/druid/var
+      # - druid_shared:/opt/shared
+      # - coordinator_var:/opt/druid/var
+      - /block/store/druid_shared:/opt/shared
+      - /block/store/coordinator_var:/opt/druid/var
     depends_on: 
       - zookeeper
       - postgres
@@ -147,7 +149,7 @@ services:
     image: apache/druid:0.23.0
     container_name: broker
     volumes:
-      - broker_var:/opt/druid/var
+      - /block/store/broker_var:/opt/druid/var
     depends_on: 
       - zookeeper
       - postgres
@@ -163,8 +165,8 @@ services:
     image: apache/druid:0.23.0
     container_name: historical
     volumes:
-      - druid_shared:/opt/shared
-      - historical_var:/opt/druid/var
+      - /block/store/druid_shared:/opt/shared
+      - /block/store/historical_var:/opt/druid/var
     depends_on: 
       - zookeeper
       - postgres
@@ -180,8 +182,8 @@ services:
     image: apache/druid:0.23.0
     container_name: middlemanager
     volumes:
-      - druid_shared:/opt/shared
-      - middle_var:/opt/druid/var
+      - /block/store/druid_shared:/opt/shared
+      - /block/store/middle_var:/opt/druid/var
     depends_on: 
       - zookeeper
       - postgres
@@ -198,7 +200,7 @@ services:
     image: apache/druid:0.23.0
     container_name: router
     volumes:
-      - router_var:/opt/druid/var
+      - /block/store/router_var:/opt/druid/var
     depends_on:
       - zookeeper
       - postgres