Split ci_queuing_disaster_recovery into two feature flags

app/services/ci/queue/builds_table_strategy.rb

@@ -18,7 +18,7 @@ module Ci
           .joins('LEFT JOIN project_features ON ci_builds.project_id = project_features.project_id')
           .where('project_features.builds_access_level IS NULL or project_features.builds_access_level > 0')
 
-        if Feature.enabled?(:ci_queueing_disaster_recovery, runner, type: :ops, default_enabled: :yaml)
+        if Feature.enabled?(:ci_queueing_disaster_recovery_disable_fair_scheduling, runner, type: :ops, default_enabled: :yaml)
           # if disaster recovery is enabled, we fallback to FIFO scheduling
           relation.order('ci_builds.id ASC')
         else

app/services/ci/queue/pending_builds_strategy.rb

@@ -18,7 +18,7 @@ module Ci
           .joins('LEFT JOIN project_features ON ci_pending_builds.project_id = project_features.project_id')
           .where('project_features.builds_access_level IS NULL or project_features.builds_access_level > 0')
 
-        if Feature.enabled?(:ci_queueing_disaster_recovery, runner, type: :ops, default_enabled: :yaml)
+        if Feature.enabled?(:ci_queueing_disaster_recovery_disable_fair_scheduling, runner, type: :ops, default_enabled: :yaml)
           # if disaster recovery is enabled, we fallback to FIFO scheduling
           relation.order('ci_pending_builds.build_id ASC')
         else

config/feature_flags/ops/ci_queueing_disaster_recovery_disable_fair_scheduling.yml

+---
+name: ci_queueing_disaster_recovery_disable_fair_scheduling
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56658
+rollout_issue_url:
+milestone: "13.12"
+type: ops
+group: group::pipeline execution
+default_enabled: false

config/feature_flags/ops/ci_queueing_disaster_recovery_disable_quota.yml

+---
+name: ci_queueing_disaster_recovery_disable_quota
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56658
+rollout_issue_url:
+milestone: "13.12"
+type: ops
+group: group::pipeline execution
+default_enabled: false

doc/administration/troubleshooting/defcon.md

@@ -10,7 +10,7 @@ type: reference
 This document describes a feature that allows you to disable some important but computationally
 expensive parts of the application to relieve stress on the database during an ongoing downtime.
 
-## `ci_queueing_disaster_recovery`
+## `ci_queueing_disaster_recovery_disable_fair_scheduling`
 
 This feature flag, if temporarily enabled, disables fair scheduling on shared runners.
 This can help to reduce system resource usage on the `jobs/request` endpoint
@@ -20,6 +20,16 @@ Side effects:
 
 - In case of a large backlog of jobs, the jobs are processed in the order
   they were put in the system, instead of balancing the jobs across many projects.
+
+## `ci_queueing_disaster_recovery_disable_quota`
+
+This feature flag, if temporarily enabled, disables enforcing CI minutes quota
+on shared runners. This can help to reduce system resource usage on the
+`jobs/request` endpoint by significantly reducing the computations being
+performed.
+
+Side effects:
+
 - Projects which are out of quota will be run. This affects
   only jobs created during the last hour, as prior jobs are canceled
   by a periodic background worker (`StuckCiJobsWorker`).

ee/app/services/ee/ci/queue/build_queue_service.rb

@@ -10,7 +10,7 @@ module EE
         override :builds_for_shared_runner
         def builds_for_shared_runner
           # if disaster recovery is enabled, we disable quota
-          if ::Feature.enabled?(:ci_queueing_disaster_recovery, runner, type: :ops, default_enabled: :yaml)
+          if ::Feature.enabled?(:ci_queueing_disaster_recovery_disable_quota, runner, type: :ops, default_enabled: :yaml)
             super
           else
             enforce_minutes_based_on_cost_factors(super)

ee/spec/services/ci/register_job_service_spec.rb

@@ -37,7 +37,7 @@ RSpec.describe Ci::RegisterJobService, '#execute' do
         end
 
         it 'when in disaster recovery it ignores quota and returns anyway' do
-          stub_feature_flags(ci_queueing_disaster_recovery: true)
+          stub_feature_flags(ci_queueing_disaster_recovery_disable_quota: true)
 
           is_expected.to be_kind_of(Ci::Build)
         end
@@ -67,7 +67,7 @@ RSpec.describe Ci::RegisterJobService, '#execute' do
         end
 
         it 'when in disaster recovery it ignores quota and returns anyway' do
-          stub_feature_flags(ci_queueing_disaster_recovery: true)
+          stub_feature_flags(ci_queueing_disaster_recovery_disable_quota: true)
 
           is_expected.to be_kind_of(Ci::Build)
         end

spec/services/ci/register_job_service_spec.rb

@@ -145,7 +145,7 @@ module Ci
 
             context 'when using DEFCON mode that disables fair scheduling' do
               before do
-                stub_feature_flags(ci_queueing_disaster_recovery: true)
+                stub_feature_flags(ci_queueing_disaster_recovery_disable_fair_scheduling: true)
               end
 
               context 'when all builds are pending' do

spec/spec_helper.rb

@@ -260,8 +260,9 @@ RSpec.configure do |config|
       # tests, until we introduce it in user settings
       stub_feature_flags(forti_token_cloud: false)
 
-      # This feature flag is by default disabled and used in disaster recovery mode
-      stub_feature_flags(ci_queueing_disaster_recovery: false)
+      # These feature flag are by default disabled and used in disaster recovery mode
+      stub_feature_flags(ci_queueing_disaster_recovery_disable_fair_scheduling: false)
+      stub_feature_flags(ci_queueing_disaster_recovery_disable_quota: false)
 
       enable_rugged = example.metadata[:enable_rugged].present?