Fixes #27075 - fact names check

definitions/checks/foreman_facts_names.rb

@@ -0,0 +1,29 @@
+class Checks::ForemanFactsNames < ForemanMaintain::Check
+  metadata do
+    label :foreman_fact_names
+    tags :default
+    confine do
+      feature(:foreman_database)
+    end
+    description 'Check number of fact names in database'
+  end
+
+  def run
+    max = 10_000
+    sql = <<-SQL
+    select fact_values.host_id, count(fact_values.id) from fact_values
+    group by fact_values.host_id order by count desc limit 1
+    SQL
+    result = feature(:foreman_database).query(sql).first
+    if result
+      host_id = result['host_id']
+      fact_values = result['fact_values']
+    else
+      fact_values = 0
+    end
+    assert(fact_values < max,
+      "Host (ID #{host_id}) has #{fact_values} fact values. This can cause slow fact processing.",
+      :warn => true,
+      :next_steps => [Procedures::KnowledgeBaseArticle.new(:doc => 'many_fact_values')])
+  end
+end

definitions/procedures/knowledge_base_article.rb

@@ -24,7 +24,8 @@ def run
   def kcs_documents
     {
       'fix_cpdb_validate_failure' => 'https://access.redhat.com/solutions/3362821',
-      'upgrade_puppet_guide_for_sat63' => 'https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html/upgrading_and_updating_red_hat_satellite/upgrading_puppet-1'
+      'upgrade_puppet_guide_for_sat63' => 'https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html/upgrading_and_updating_red_hat_satellite/upgrading_puppet-1',
+      'many_fact_values' => 'https://access.redhat.com/solutions/4163891'
     }
   end
 end