Stop liveness check returning incorrect data

app/controllers/health_controller.rb

@@ -20,9 +20,7 @@ class HealthController < ActionController::Base
   end
 
   def liveness
-    results = CHECKS.map { |check| [check.name, check.liveness] }
-
-    render_check_results(results)
+    render json: { status: 'ok' }, status: :ok
   end
 
   private

changelogs/unreleased/stop-liveness-check-returning-incorrect-data.yml

+---
+title: Changes response body of liveness check to be more accurate
+merge_request: 17655
+author:
+type: changed

doc/user/admin_area/monitoring/health_check.md

@@ -116,28 +116,11 @@ curl 'https://gitlab.example.com/-/liveness'
 
 Example response:
 
-On success, the endpoint will return a valid successful HTTP status code, and a response like below.
+On success, the endpoint will return a `200` HTTP status code, and a response like below.
 
 ```json
 {
-   "db_check":{
-      "status":"ok"
-   },
-   "redis_check":{
-      "status":"ok"
-   },
-   "cache_check":{
-      "status":"ok"
-   },
-   "queues_check":{
-      "status":"ok"
-   },
-   "shared_state_check":{
-      "status":"ok"
-   },
-   "gitaly_check":{
-      "status":"ok"
-   }
+   "status": "ok"
 }
 ```
 

lib/gitlab/health_checks/base_abstract_check.rb

@@ -15,10 +15,6 @@ module Gitlab
         raise NotImplementedError
       end
 
-      def liveness
-        HealthChecks::Result.new(true)
-      end
-
       def metrics
         []
       end

spec/controllers/health_controller_spec.rb

@@ -76,10 +76,7 @@ describe HealthController do
       it 'responds with liveness checks data' do
         subject
 
-        expect(json_response['db_check']['status']).to eq('ok')
-        expect(json_response['cache_check']['status']).to eq('ok')
-        expect(json_response['queues_check']['status']).to eq('ok')
-        expect(json_response['shared_state_check']['status']).to eq('ok')
+        expect(json_response['status']).to eq('ok')
       end
     end
 

spec/lib/gitlab/health_checks/simple_check_shared.rb

@@ -58,9 +58,4 @@ shared_context 'simple_check' do |metrics_prefix, check_name, success_result|
       it { is_expected.to have_attributes(success: false, message: "#{described_class.human_name} check timed out") }
     end
   end
-
-  describe '#liveness' do
-    subject { described_class.readiness }
-    it { is_expected.to eq(Gitlab::HealthChecks::Result.new(true)) }
-  end
 end