Change default of create_issue for alerts

Add a migration to change the incident settings create_issue
column default. Add incident settings to existing projects by
adding a data migration which adds project incident settings
settings to projects with issues that have the incident label.

changelogs/unreleased/217034-auto-creation-of-issues-for-alerts-off-by-default.yml

+---
+title: Turn off alert issue creation by default
+merge_request: 34107
+author:
+type: added

db/migrate/20200608214008_change_column_default_project_incident_management_settings.rb

+# frozen_string_literal: true
+
+class ChangeColumnDefaultProjectIncidentManagementSettings < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    change_column_default(:project_incident_management_settings, :create_issue, from: true, to: false)
+  end
+
+  def down
+    change_column_default(:project_incident_management_settings, :create_issue, from: false, to: true)
+  end
+end

db/migrate/20200609212701_add_incident_settings_to_all_existing_projects.rb

+# frozen_string_literal: true
+
+class AddIncidentSettingsToAllExistingProjects < ActiveRecord::Migration[6.0]
+  DOWNTIME = false
+
+  def up
+    # Add records to projects project_incident_management_settings
+    # to preserve behavior for existing projects that
+    # are using the create issue functionality with the default setting of true
+    query = <<-SQL
+      WITH project_ids AS (
+        SELECT DISTINCT issues.project_id AS id
+        FROM issues
+        LEFT OUTER JOIN project_incident_management_settings
+                    ON project_incident_management_settings.project_id = issues.project_id
+        INNER JOIN label_links
+               ON label_links.target_type = 'Issue'
+                  AND label_links.target_id = issues.id
+        INNER JOIN labels
+               ON labels.id = label_links.label_id
+        WHERE  ( project_incident_management_settings.project_id IS NULL )
+               -- Use incident labels even though they could be manually added by users who
+               -- are not using alert funtionality.
+               AND labels.title = 'incident'
+               AND labels.color = '#CC0033'
+               AND labels.description = 'Denotes a disruption to IT services and the associated issues require immediate attention'
+      )
+      INSERT INTO project_incident_management_settings (project_id, create_issue, send_email, issue_template_key)
+      SELECT project_ids.id, TRUE, FALSE, NULL
+      FROM project_ids
+      ON CONFLICT (project_id) DO NOTHING;
+    SQL
+
+    execute(query)
+  end
+
+  def down
+    # no-op
+  end
+end

db/structure.sql

@@ -5223,7 +5223,7 @@ ALTER SEQUENCE public.project_import_data_id_seq OWNED BY public.project_import_
 
 CREATE TABLE public.project_incident_management_settings (
     project_id integer NOT NULL,
-    create_issue boolean DEFAULT true NOT NULL,
+    create_issue boolean DEFAULT false NOT NULL,
     send_email boolean DEFAULT false NOT NULL,
     issue_template_key text
 );
@@ -13888,6 +13888,8 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200604174558
 20200608072931
 20200608075553
+20200608214008
 20200609002841
+20200609212701
 \.
 

doc/user/project/integrations/prometheus.md

@@ -998,7 +998,7 @@ In GitLab versions 13.1 and greater, you can configure your manually configured
 >- [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/4925) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 11.11.
 >- [From GitLab Ultimate 12.5](https://gitlab.com/gitlab-org/gitlab/-/issues/13401), when GitLab receives a recovery alert, it will automatically close the associated issue.
 
-Alerts can be used to trigger actions, like opening an issue automatically (enabled by default since `12.1`). To configure the actions:
+Alerts can be used to trigger actions, like opening an issue automatically (disabled by default since `13.1`). To configure the actions:
 
 1. Navigate to your project's **Settings > Operations > Incidents**.
 1. Enable the option to create issues.

spec/helpers/projects_helper_spec.rb

@@ -32,8 +32,8 @@ describe ProjectsHelper do
         setting = helper.project_incident_management_setting
 
         expect(setting).not_to be_persisted
+        expect(setting.create_issue).to be_falsey
         expect(setting.send_email).to be_falsey
-        expect(setting.create_issue).to be_truthy
         expect(setting.issue_template_key).to be_nil
       end
     end

spec/migrations/add_incident_settings_to_all_existing_projects_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20200609212701_add_incident_settings_to_all_existing_projects.rb')
+
+describe AddIncidentSettingsToAllExistingProjects, :migration do
+  let(:project_incident_management_settings) { table(:project_incident_management_settings) }
+  let(:labels) { table(:labels) }
+  let(:label_links) { table(:label_links) }
+  let(:issues) { table(:issues) }
+  let(:projects) { table(:projects) }
+  let(:namespaces) { table(:namespaces) }
+
+  RSpec.shared_examples 'setting not added' do
+    it 'does not add settings' do
+      migrate!
+
+      expect { migrate! }.not_to change { IncidentManagement::ProjectIncidentManagementSetting.count }
+    end
+  end
+
+  RSpec.shared_examples 'project has no incident settings' do
+    it 'has no settings' do
+      migrate!
+
+      expect(settings).to eq(nil)
+    end
+  end
+
+  RSpec.shared_examples 'no change to incident settings' do
+    it 'does not change existing settings' do
+      migrate!
+
+      expect(settings.create_issue).to eq(existing_create_issue)
+    end
+  end
+
+  RSpec.shared_context 'with incident settings' do
+    let(:existing_create_issue) { false }
+    before do
+      project_incident_management_settings.create(
+        project_id: project.id,
+        create_issue: existing_create_issue
+      )
+    end
+  end
+
+  describe 'migrate!' do
+    let(:namespace) { namespaces.create!(name: 'foo', path: 'foo') }
+    let!(:project) { projects.create!(namespace_id: namespace.id) }
+    let(:settings) { project_incident_management_settings.find_by(project_id: project.id) }
+
+    context 'when project does not have incident label' do
+      context 'does not have incident settings' do
+        include_examples 'setting not added'
+        include_examples 'project has no incident settings'
+      end
+
+      context 'and has incident settings' do
+        include_context 'with incident settings'
+
+        include_examples 'setting not added'
+        include_examples 'no change to incident settings'
+      end
+    end
+
+    context 'when project has incident labels' do
+      before do
+        issue = issues.create!(project_id: project.id)
+        incident_label_attrs = IncidentManagement::CreateIssueService::INCIDENT_LABEL
+        incident_label = labels.create!(project_id: project.id, **incident_label_attrs)
+        label_links.create!(target_id: issue.id, label_id: incident_label.id, target_type: 'Issue')
+      end
+
+      context 'when project has incident settings' do
+        include_context 'with incident settings'
+
+        include_examples 'setting not added'
+        include_examples 'no change to incident settings'
+      end
+
+      context 'does not have incident settings' do
+        it 'adds incident settings with old defaults' do
+          migrate!
+
+          expect(settings.create_issue).to eq(true)
+          expect(settings.send_email).to eq(false)
+          expect(settings.issue_template_key).to eq(nil)
+        end
+      end
+    end
+  end
+end

spec/workers/incident_management/process_alert_worker_spec.rb

@@ -4,6 +4,7 @@ require 'spec_helper'
 
 describe IncidentManagement::ProcessAlertWorker do
   let_it_be(:project) { create(:project) }
+  let_it_be(:settings) { create(:project_incident_management_setting, project: project, create_issue: true) }
 
   describe '#perform' do
     let(:alert_management_alert_id) { nil }

spec/workers/incident_management/process_prometheus_alert_worker_spec.rb

@@ -8,6 +8,7 @@ describe IncidentManagement::ProcessPrometheusAlertWorker do
     let_it_be(:prometheus_alert) { create(:prometheus_alert, project: project) }
     let(:payload_key) { Gitlab::Alerting::Alert.new(project: project, payload: alert_params).gitlab_fingerprint }
     let!(:prometheus_alert_event) { create(:prometheus_alert_event, prometheus_alert: prometheus_alert, payload_key: payload_key) }
+    let!(:settings) { create(:project_incident_management_setting, project: project, create_issue: true) }
 
     let(:alert_params) do
       {