Support Elasticsearch v5.1 - v5.5

.gitlab-ci.yml

@@ -65,13 +65,13 @@ stages:
   services:
     - postgres:9.2
     - redis:alpine
-    - docker.elastic.co/elasticsearch/elasticsearch:5.3.2
+    - docker.elastic.co/elasticsearch/elasticsearch:5.5.2
 
 .use-mysql: &use-mysql
   services:
     - mysql:latest
     - redis:alpine
-    - docker.elastic.co/elasticsearch/elasticsearch:5.3.2
+    - docker.elastic.co/elasticsearch/elasticsearch:5.5.2
 
 
 .only-if-want-mysql: &only-if-want-mysql

changelogs/unreleased-ee/es-5-5.yml

+---
+title: Support Elasticsearch v5.1 - v5.5
+merge_request: 2751
+author:
+type: changed

doc/integration/elasticsearch.md

@@ -17,7 +17,7 @@ special searches:
 | GitLab version | Elasticsearch version |
 | -------------- | --------------------- |
 | GitLab Enterprise Edition 8.4 - 8.17  | Elasticsearch 2.4 with [Delete By Query Plugin](https://www.elastic.co/guide/en/elasticsearch/plugins/2.4/plugins-delete-by-query.html) installed |
-| GitLab Enterprise Edition 9.0+        | Elasticsearch 5.1 - 5.3 |
+| GitLab Enterprise Edition 9.0+        | Elasticsearch 5.1 - 5.5 |
 
 ## Installing Elasticsearch
 

lib/system_check/app/elasticsearch_check.rb

 module SystemCheck
   module App
     class ElasticsearchCheck < SystemCheck::BaseCheck
-      set_name 'Elasticsearch version 5.1 - 5.3?'
+      set_name 'Elasticsearch version 5.1 - 5.5?'
       set_skip_reason 'skipped (elasticsearch is disabled)'
       set_check_pass -> { "yes (#{self.current_version})" }
       set_check_fail -> { "no (#{self.current_version})" }
@@ -18,7 +18,7 @@ module SystemCheck
       end
 
       def check?
-        self.class.current_version.major == 5 && (1..3).cover?(self.class.current_version.minor)
+        self.class.current_version.major == 5 && (1..5).cover?(self.class.current_version.minor)
       end
 
       def show_error