upgrade to elasticsearch 5

bakerydemo/settings/production.py

@@ -51,7 +51,7 @@ if ELASTICSEARCH_ENDPOINT:
     from elasticsearch import RequestsHttpConnection
     WAGTAILSEARCH_BACKENDS = {
         'default': {
-            'BACKEND': 'wagtail.search.backends.elasticsearch2',
+            'BACKEND': 'wagtail.search.backends.elasticsearch5',
             'HOSTS': [{
                 'host': ELASTICSEARCH_ENDPOINT,
                 'port': int(os.getenv('ELASTICSEARCH_PORT', '9200')),

docker-compose.yml

@@ -16,7 +16,7 @@ services:
     expose:
       - "6379"
   elasticsearch:
-    image: elasticsearch:2.3
+    image: elasticsearch:5.4
     restart: always
     expose:
       - "9200"

requirements/production.txt

@@ -1,7 +1,5 @@
 -r base.txt
-# elasticsearch==2.x.x chosen for compatibility with t2.micro.elasticsearch and t2.small.elasticsearch
-# instance types on AWS (Elasticsearch 2.3). Adjust for your deployment as needed.
-elasticsearch==2.4.1
+elasticsearch==5.5.3
 # Additional dependencies for Heroku, AWS, and Google Cloud deployment
 dj-database-url==0.4.1
 uwsgi>=2.0.17,<2.1