Add missing wiki counts to prometheus metrics

changelogs/unreleased-ee/4414-add-wiki-total-synced-failed-to-prometheus-metrics.yml

+---
+title: Add missing wiki counts to prometheus metrics
+merge_request: 3875
+author:
+type: fixed

ee/app/models/geo_node_status.rb

@@ -11,6 +11,9 @@ class GeoNodeStatus < ActiveRecord::Base
     repositories_count: 'Total number of repositories available on primary',
     repositories_synced_count: 'Number of repositories synced on secondary',
     repositories_failed_count: 'Number of repositories failed to sync on secondary',
+    wikis_count: 'Total number of wikis available on primary',
+    wikis_synced_count: 'Number of wikis synced on secondary',
+    wikis_failed_count: 'Number of wikis failed to sync on secondary',
     lfs_objects_count: 'Total number of LFS objects available on primary',
     lfs_objects_synced_count: 'Number of LFS objects synced on secondary',
     lfs_objects_failed_count: 'Number of LFS objects failed to sync on secondary',

spec/ee/spec/services/geo/metrics_update_service_spec.rb

@@ -19,6 +19,9 @@ describe Geo::MetricsUpdateService, :geo do
       repositories_count: 10,
       repositories_synced_count: 1,
       repositories_failed_count: 2,
+      wikis_count: 10,
+      wikis_synced_count: 1,
+      wikis_failed_count: 2,
       lfs_objects_count: 100,
       lfs_objects_synced_count: 50,
       lfs_objects_failed_count: 12,
@@ -101,6 +104,9 @@ describe Geo::MetricsUpdateService, :geo do
         expect(metric_value(:geo_repositories)).to eq(10)
         expect(metric_value(:geo_repositories_synced)).to eq(1)
         expect(metric_value(:geo_repositories_failed)).to eq(2)
+        expect(metric_value(:geo_wikis)).to eq(10)
+        expect(metric_value(:geo_wikis_synced)).to eq(1)
+        expect(metric_value(:geo_wikis_failed)).to eq(2)
         expect(metric_value(:geo_lfs_objects)).to eq(100)
         expect(metric_value(:geo_lfs_objects_synced)).to eq(50)
         expect(metric_value(:geo_lfs_objects_failed)).to eq(12)