Add GraphQL API to update Canary Ingress Weight

Canary Ingress weight is to control the traffic
between stable and canary tracks in Auto Deployed
environment.

app/models/environment.rb

@@ -305,6 +305,10 @@ def has_opened_alert?
     latest_opened_most_severe_alert.present?
   end
+  def has_running_deployments?
+    all_deployments.running.exists?
+  end
+
   def metrics
     prometheus_adapter.query(:environment, self) if has_metrics_and_can_query?
   end

app/serializers/environment_entity.rb

@@ -4,6 +4,11 @@ class EnvironmentEntity < Grape::Entity
   include RequestAwareEntity
   expose :id
+
+  expose :global_id do |environment|
+    environment.to_global_id.to_s
+  end
+
   expose :name
   expose :state
   expose :external_url

doc/api/graphql/reference/gitlab_schema.graphql

@@ -6618,6 +6618,41 @@ Identifier of Environment
 """
 scalar EnvironmentID
+"""
+Autogenerated input type of EnvironmentsCanaryIngressUpdate
+"""
+input EnvironmentsCanaryIngressUpdateInput {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  The global ID of the environment to update
+  """
+  id: EnvironmentID!
+
+  """
+  The weight of the Canary Ingress
+  """
+  weight: Int!
+}
+
+"""
+Autogenerated return type of EnvironmentsCanaryIngressUpdate
+"""
+type EnvironmentsCanaryIngressUpdatePayload {
+  """
+  A unique identifier for the client performing the mutation.
+  """
+  clientMutationId: String
+
+  """
+  Errors encountered during execution of the mutation.
+  """
+  errors: [String!]!
+}
+
 """
 Represents an epic
 """
@@ -13208,6 +13243,7 @@ type Mutation {
   """
   discussionToggleResolve(input: DiscussionToggleResolveInput!): DiscussionToggleResolvePayload
   dismissVulnerability(input: DismissVulnerabilityInput!): DismissVulnerabilityPayload @deprecated(reason: "Use vulnerabilityDismiss. Deprecated in 13.5")
+  environmentsCanaryIngressUpdate(input: EnvironmentsCanaryIngressUpdateInput!): EnvironmentsCanaryIngressUpdatePayload
   epicAddIssue(input: EpicAddIssueInput!): EpicAddIssuePayload
   epicSetSubscription(input: EpicSetSubscriptionInput!): EpicSetSubscriptionPayload
   epicTreeReorder(input: EpicTreeReorderInput!): EpicTreeReorderPayload

doc/api/graphql/reference/gitlab_schema.json

@@ -18349,6 +18349,108 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "INPUT_OBJECT",
+          "name": "EnvironmentsCanaryIngressUpdateInput",
+          "description": "Autogenerated input type of EnvironmentsCanaryIngressUpdate",
+          "fields": null,
+          "inputFields": [
+            {
+              "name": "id",
+              "description": "The global ID of the environment to update",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "EnvironmentID",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "weight",
+              "description": "The weight of the Canary Ingress",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Int",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "defaultValue": null
+            }
+          ],
+          "interfaces": null,
+          "enumValues": null,
+          "possibleTypes": null
+        },
+        {
+          "kind": "OBJECT",
+          "name": "EnvironmentsCanaryIngressUpdatePayload",
+          "description": "Autogenerated return type of EnvironmentsCanaryIngressUpdate",
+          "fields": [
+            {
+              "name": "clientMutationId",
+              "description": "A unique identifier for the client performing the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "errors",
+              "description": "Errors encountered during execution of the mutation.",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "LIST",
+                  "name": null,
+                  "ofType": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "SCALAR",
+                      "name": "String",
+                      "ofType": null
+                    }
+                  }
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "inputFields": null,
+          "interfaces": [
+
+          ],
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "Epic",
@@ -37454,6 +37556,33 @@
               "isDeprecated": true,
               "deprecationReason": "Use vulnerabilityDismiss. Deprecated in 13.5"
             },
+            {
+              "name": "environmentsCanaryIngressUpdate",
+              "description": null,
+              "args": [
+                {
+                  "name": "input",
+                  "description": null,
+                  "type": {
+                    "kind": "NON_NULL",
+                    "name": null,
+                    "ofType": {
+                      "kind": "INPUT_OBJECT",
+                      "name": "EnvironmentsCanaryIngressUpdateInput",
+                      "ofType": null
+                    }
+                  },
+                  "defaultValue": null
+                }
+              ],
+              "type": {
+                "kind": "OBJECT",
+                "name": "EnvironmentsCanaryIngressUpdatePayload",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "epicAddIssue",
               "description": null,

doc/api/graphql/reference/index.md

@@ -1101,6 +1101,15 @@ Describes where code is deployed for a project.
 | `path` | String! | The path to the environment. |
 | `state` | String! | State of the environment, for example: available/stopped |
+### EnvironmentsCanaryIngressUpdatePayload
+
+Autogenerated return type of EnvironmentsCanaryIngressUpdate.
+
+| Field | Type | Description |
+| ----- | ---- | ----------- |
+| `clientMutationId` | String | A unique identifier for the client performing the mutation. |
+| `errors` | String! => Array | Errors encountered during execution of the mutation. |
+
 ### Epic
 Represents an epic.

ee/app/graphql/ee/types/mutation_type.rb

@@ -13,6 +13,7 @@ module MutationType
         mount_mutation ::Mutations::Issues::SetIteration
         mount_mutation ::Mutations::Issues::SetWeight
         mount_mutation ::Mutations::Issues::SetEpic
+        mount_mutation ::Mutations::Environments::CanaryIngress::Update
         mount_mutation ::Mutations::EpicTree::Reorder
         mount_mutation ::Mutations::Epics::Update
         mount_mutation ::Mutations::Epics::Create

ee/app/graphql/mutations/environments/canary_ingress/update.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Environments
+    module CanaryIngress
+      class Update < ::Mutations::BaseMutation
+        graphql_name 'EnvironmentsCanaryIngressUpdate'
+
+        authorize :update_environment
+
+        argument :id,
+                 ::Types::GlobalIDType[::Environment],
+                 required: true,
+                 description: 'The global ID of the environment to update'
+
+        argument :weight,
+                 GraphQL::INT_TYPE,
+                 required: true,
+                 description: 'The weight of the Canary Ingress'
+
+        def resolve(id:, **kwargs)
+          environment = authorized_find!(id: id)
+
+          result = ::Environments::CanaryIngress::UpdateService
+            .new(environment.project, current_user, kwargs)
+            .execute(environment)
+
+          { errors: Array.wrap(result[:message]) }
+        end
+
+        def find_object(id:)
+          # TODO: remove as part of https://gitlab.com/gitlab-org/gitlab/-/issues/257883
+          id = ::Types::GlobalIDType[::Environment].coerce_isolated_input(id)
+          GitlabSchema.find_by_gid(id)
+        end
+      end
+    end
+  end
+end

ee/app/models/ee/clusters/platforms/kubernetes.rb

@@ -38,6 +38,15 @@ def rollout_status(environment, data)
           ::Gitlab::Kubernetes::RolloutStatus.from_deployments(*deployments, pods_attrs: pods, ingresses: ingresses)
         end
+        def ingresses(namespace)
+          ingresses = read_ingresses(namespace)
+          ingresses.map { |ingress| ::Gitlab::Kubernetes::Ingress.new(ingress) }
+        end
+
+        def patch_ingress(namespace, ingress, data)
+          kubeclient.patch_ingress(ingress.name, data, namespace)
+        end
+
         private
         def read_deployments(namespace)

ee/app/models/ee/environment.rb

@@ -75,6 +75,18 @@ def rollout_status
       result || ::Gitlab::Kubernetes::RolloutStatus.loading
     end
+    def ingresses
+      return unless rollout_status_available?
+
+      deployment_platform.ingresses(deployment_namespace)
+    end
+
+    def patch_ingress(ingress, data)
+      return unless rollout_status_available?
+
+      deployment_platform.patch_ingress(deployment_namespace, ingress, data)
+    end
+
     private
     def rollout_status_available?

ee/app/services/environments/canary_ingress/update_service.rb

+# frozen_string_literal: true
+
+module Environments
+  module CanaryIngress
+    class UpdateService < ::BaseService
+      def execute(environment)
+        result = validate(environment)
+
+        return result unless result[:status] == :success
+
+        canary_ingress = environment.ingresses&.find(&:canary?)
+
+        unless canary_ingress.present?
+          return error(_('Canary Ingress does not exist in the environment.'))
+        end
+
+        if environment.patch_ingress(canary_ingress, patch_data)
+          success
+        else
+          error(_('Failed to update the Canary Ingress.'), :bad_request)
+        end
+      end
+
+      private
+
+      def validate(environment)
+        unless Feature.enabled?(:canary_ingress_weight_control, environment.project)
+          return error(_("Feature flag is not enabled on the environment's project."))
+        end
+
+        unless can?(current_user, :update_environment, environment)
+          return error(_('You do not have permission to update the environment.'))
+        end
+
+        unless environment.project.feature_available?(:deploy_board)
+          return error(_('The license for Deploy Board is required to use this feature.'))
+        end
+
+        unless params[:weight].is_a?(Integer) && (0..100).cover?(params[:weight])
+          return error(_('Canary weight must be specified and valid range (0..100).'))
+        end
+
+        if environment.has_running_deployments?
+          return error(_('There are running deployments on the environment. Please retry later.'))
+        end
+
+        if ::Gitlab::ApplicationRateLimiter.throttled?(:update_environment_canary_ingress, scope: [environment])
+          return error(_("This environment's canary ingress has been updated recently. Please retry later."))
+        end
+
+        success
+      end
+
+      def patch_data
+        {
+          metadata: {
+            annotations: {
+              Gitlab::Kubernetes::Ingress::ANNOTATION_KEY_CANARY_WEIGHT => params[:weight].to_s
+            }
+          }
+        }
+      end
+    end
+  end
+end

ee/lib/gitlab/kubernetes/ingress.rb

@@ -28,6 +28,10 @@ def canary_weight
         annotations[ANNOTATION_KEY_CANARY_WEIGHT].to_i
       end
+      def name
+        metadata['name']
+      end
+
       private
       def metadata

ee/spec/fixtures/api/schemas/environment.json

@@ -14,6 +14,7 @@
     "id": {
       "type": "integer"
     },
+    "global_id": { "type": "string" },
     "name": {
       "type": "string"
     },

ee/spec/graphql/mutations/environments/canary_ingress/update_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Environments::CanaryIngress::Update do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:environment) { create(:environment, project: project) }
+  let_it_be(:maintainer) { create(:user) }
+  let_it_be(:reporter) { create(:user) }
+  let(:user) { maintainer }
+
+  subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  before_all do
+    project.add_maintainer(maintainer)
+    project.add_reporter(reporter)
+  end
+
+  describe '#resolve' do
+    subject { mutation.resolve(id: environment_id, weight: weight) }
+
+    let(:environment_id) { environment.to_global_id.to_s }
+    let(:weight) { 50 }
+    let(:update_service) { double('update_service') }
+
+    before do
+      allow(Environments::CanaryIngress::UpdateService).to receive(:new) { update_service }
+    end
+
+    context 'when service execution succeeded' do
+      before do
+        allow(update_service).to receive(:execute) { { status: :success } }
+      end
+
+      it 'returns no errors' do
+        expect(subject[:errors]).to be_empty
+      end
+    end
+
+    context 'when service encounters a problem' do
+      before do
+        allow(update_service).to receive(:execute) { { status: :error, message: 'something went wrong' } }
+      end
+
+      it 'returns an error' do
+        expect(subject[:errors]).to eq(['something went wrong'])
+      end
+    end
+
+    context 'when environment is not found' do
+      let(:environment_id) { non_existing_record_id.to_s }
+
+      it 'raises an error' do
+        expect { subject }.to raise_error(GraphQL::CoercionError)
+      end
+    end
+
+    context 'when user is reporter who does not have permission to access the environment' do
+      let(:user) { reporter }
+
+      it 'raises an error' do
+        expect { subject }.to raise_error("The resource that you are attempting to access does not exist or you don't have permission to perform this action")
+      end
+    end
+  end
+end

ee/spec/lib/gitlab/kubernetes/ingress_spec.rb

@@ -39,6 +39,14 @@
     end
   end
+  describe '#name' do
+    subject { ingress.name }
+
+    let(:params) { stable_metadata }
+
+    it { is_expected.to eq('production-auto-deploy') }
+  end
+
   def stable_metadata
     kube_ingress(track: :stable)
   end

ee/spec/models/ee/clusters/platforms/kubernetes_spec.rb

@@ -380,4 +380,62 @@
       it { is_expected.to include(deployments: [], ingresses: []) }
     end
   end
+
+  describe '#ingresses' do
+    subject { service.ingresses(namespace) }
+
+    let(:service) { create(:cluster_platform_kubernetes, :configured) }
+    let(:namespace) { 'project-namespace' }
+
+    context 'when there is an ingress in the namespace' do
+      before do
+        stub_kubeclient_ingresses(namespace)
+      end
+
+      it 'returns an ingress' do
+        expect(subject.count).to eq(1)
+        expect(subject.first).to be_kind_of(::Gitlab::Kubernetes::Ingress)
+        expect(subject.first.name).to eq('production-auto-deploy')
+      end
+    end
+
+    context 'when there are no ingresss in the namespace' do
+      before do
+        allow(service.kubeclient).to receive(:get_ingresses) { raise Kubeclient::ResourceNotFoundError.new(404, 'Not found', nil) }
+      end
+
+      it 'returns nothing' do
+        is_expected.to be_empty
+      end
+    end
+  end
+
+  describe '#patch_ingress' do
+    subject { service.patch_ingress(namespace, ingress, data) }
+
+    let(:service) { create(:cluster_platform_kubernetes, :configured) }
+    let(:namespace) { 'project-namespace' }
+    let(:ingress) { Gitlab::Kubernetes::Ingress.new(kube_ingress) }
+    let(:data) { { metadata: { annotations: { name: 'test' } } } }
+
+    context 'when there is an ingress in the namespace' do
+      before do
+        stub_kubeclient_ingresses(namespace, method: :patch, resource_path: "/#{ingress.name}")
+      end
+
+      it 'returns an ingress' do
+        expect(subject[:items][0][:metadata][:name]).to eq('production-auto-deploy')
+      end
+    end
+
+    context 'when there are no ingresss in the namespace' do
+      before do
+        allow(service.kubeclient).to receive(:patch_ingress) { raise Kubeclient::ResourceNotFoundError.new(404, 'Not found', nil) }
+      end
+
+      it 'raises an error' do
+        expect { subject }.to raise_error(Kubeclient::ResourceNotFoundError)
+      end
+    end
+  end
 end

ee/spec/models/environment_spec.rb

@@ -229,4 +229,78 @@
       end
     end
   end
+
+  describe '#ingresses' do
+    subject { environment.ingresses }
+
+    let(:deployment_platform) { double(:deployment_platform) }
+    let(:deployment_namespace) { 'production' }
+
+    before do
+      allow(environment).to receive(:deployment_platform) { deployment_platform }
+      allow(environment).to receive(:deployment_namespace) { deployment_namespace }
+    end
+
+    context 'when rollout status is available' do
+      before do
+        allow(environment).to receive(:rollout_status_available?) { true }
+      end
+
+      it 'fetches ingresses from the deployment platform' do
+        expect(deployment_platform).to receive(:ingresses).with(deployment_namespace)
+
+        subject
+      end
+    end
+
+    context 'when rollout status is not available' do
+      before do
+        allow(environment).to receive(:rollout_status_available?) { false }
+      end
+
+      it 'does nothing' do
+        expect(deployment_platform).not_to receive(:ingresses)
+
+        subject
+      end
+    end
+  end
+
+  describe '#patch_ingress' do
+    subject { environment.patch_ingress(ingress, data) }
+
+    let(:ingress) { double(:ingress) }
+    let(:data) { double(:data) }
+    let(:deployment_platform) { double(:deployment_platform) }
+    let(:deployment_namespace) { 'production' }
+
+    before do
+      allow(environment).to receive(:deployment_platform) { deployment_platform }
+      allow(environment).to receive(:deployment_namespace) { deployment_namespace }
+    end
+
+    context 'when rollout status is available' do
+      before do
+        allow(environment).to receive(:rollout_status_available?) { true }
+      end
+
+      it 'fetches ingresses from the deployment platform' do
+        expect(deployment_platform).to receive(:patch_ingress).with(deployment_namespace, ingress, data)
+
+        subject
+      end
+    end
+
+    context 'when rollout status is not available' do
+      before do
+        allow(environment).to receive(:rollout_status_available?) { false }
+      end
+
+      it 'does nothing' do
+        expect(deployment_platform).not_to receive(:patch_ingress)
+
+        subject
+      end
+    end
+  end
 end

ee/spec/requests/api/graphql/mutations/environments/canary_ingress/update_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Update Environment Canary Ingress', :clean_gitlab_redis_cache do
+  include GraphqlHelpers
+  include KubernetesHelpers
+
+  let_it_be(:project) { create(:project, :repository) }
+  let_it_be(:cluster) { create(:cluster, :project, projects: [project]) }
+  let_it_be(:service) { create(:cluster_platform_kubernetes, :configured, cluster: cluster) }
+  let_it_be(:environment) { create(:environment, project: project) }
+  let_it_be(:deployment) { create(:deployment, :success, environment: environment, project: project) }
+  let_it_be(:maintainer) { create(:user) }
+  let_it_be(:developer) { create(:user) }
+  let(:environment_id) { environment.to_global_id.to_s }
+  let(:weight) { 25 }
+  let(:actor) { developer }
+
+  let(:mutation) do
+    graphql_mutation(:environments_canary_ingress_update, id: environment_id, weight: weight)
+  end
+
+  before_all do
+    project.add_maintainer(maintainer)
+    project.add_developer(developer)
+  end
+
+  before do
+    stub_licensed_features(deploy_board: true, protected_environments: true)
+    stub_kubeclient_ingresses(environment.deployment_namespace, response: kube_ingresses_response(with_canary: true))
+  end
+
+  context 'when kubernetes accepted the patch request' do
+    before do
+      stub_kubeclient_ingresses(environment.deployment_namespace, method: :patch, resource_path: "/production-auto-deploy")
+    end
+
+    it 'updates successfully' do
+      post_graphql_mutation(mutation, current_user: actor)
+
+      expect(graphql_mutation_response(:environments_canary_ingress_update)['errors'])
+        .to be_empty
+    end
+
+    context 'when environment is protected and allowed to be deployed by only operator' do
+      before do
+        create(:protected_environment, :maintainers_can_deploy, name: environment.name, project: project)
+      end
+
+      it 'fails to update' do
+        post_graphql_mutation(mutation, current_user: actor)
+
+        expect(graphql_errors.first)
+          .to include('message' => "The resource that you are attempting to access does not exist or you don't have permission to perform this action")
+      end
+    end
+  end
+end

ee/spec/services/environments/canary_ingress/update_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Environments::CanaryIngress::UpdateService, :clean_gitlab_redis_cache do
+  include KubernetesHelpers
+
+  let_it_be(:project, refind: true) { create(:project) }
+  let_it_be(:maintainer) { create(:user) }
+  let_it_be(:reporter) { create(:user) }
+  let(:user) { maintainer }
+  let(:params) { {} }
+  let(:service) { described_class.new(project, user, params) }
+
+  before_all do
+    project.add_maintainer(maintainer)
+    project.add_reporter(reporter)
+  end
+
+  before do
+    stub_licensed_features(deploy_board: true)
+  end
+
+  describe '#execute' do
+    subject { service.execute(environment) }
+
+    let(:environment) { create(:environment, project: project) }
+    let(:params) { { weight: 50 } }
+    let(:canary_ingress) { ::Gitlab::Kubernetes::Ingress.new(kube_ingress(track: :canary)) }
+
+    shared_examples_for 'failed request' do
+      it 'returns an error' do
+        expect(subject[:status]).to eq(:error)
+        expect(subject[:message]).to eq(message)
+      end
+    end
+
+    context 'when canary ingress is present in the environment' do
+      before do
+        allow(environment).to receive(:ingresses) { [canary_ingress] }
+      end
+
+      context 'when patch request succeeds' do
+        let(:patch_data) do
+          {
+            metadata: {
+              annotations: {
+                Gitlab::Kubernetes::Ingress::ANNOTATION_KEY_CANARY_WEIGHT => params[:weight].to_s
+              }
+            }
+          }
+        end
+
+        before do
+          allow(environment).to receive(:patch_ingress).with(canary_ingress, patch_data) { true }
+        end
+
+        it 'returns success' do
+          expect(subject[:status]).to eq(:success)
+          expect(subject[:message]).to be_nil
+        end
+      end
+
+      context 'when patch request does not succeed' do
+        before do
+          allow(environment).to receive(:patch_ingress) { false }
+        end
+
+        it_behaves_like 'failed request' do
+          let(:message) { 'Failed to update the Canary Ingress.' }
+        end
+      end
+    end
+
+    context 'when canary ingress is not present in the environment' do
+      it_behaves_like 'failed request' do
+        let(:message) { 'Canary Ingress does not exist in the environment.' }
+      end
+    end
+
+    context 'when canary_ingress_weight_control feature flag is disabled' do
+      before do
+        stub_feature_flags(canary_ingress_weight_control: false)
+      end
+
+      it_behaves_like 'failed request' do
+        let(:message) { "Feature flag is not enabled on the environment's project." }
+      end
+    end
+
+    context 'when the actor does not have permission to update environment' do
+      let(:user) { reporter }
+
+      it_behaves_like 'failed request' do
+        let(:message) { "You do not have permission to update the environment." }
+      end
+    end
+
+    context 'when project does not have an sufficient license' do
+      before do
+        stub_licensed_features(deploy_board: false)
+      end
+
+      it_behaves_like 'failed request' do
+        let(:message) { 'The license for Deploy Board is required to use this feature.' }
+      end
+    end
+
+    context 'when weight parameter is invalid' do
+      let(:params) { { weight: 'unknown' } }
+
+      it_behaves_like 'failed request' do
+        let(:message) { 'Canary weight must be specified and valid range (0..100).' }
+      end
+    end
+
+    context 'when no parameters exist' do
+      let(:params) { {} }
+
+      it_behaves_like 'failed request' do
+        let(:message) { 'Canary weight must be specified and valid range (0..100).' }
+      end
+    end
+
+    context 'when environment has a running deployment' do
+      before do
+        allow(environment).to receive(:has_running_deployments?) { true }
+      end
+
+      it_behaves_like 'failed request' do
+        let(:message) { 'There are running deployments on the environment. Please retry later.' }
+      end
+    end
+
+    context 'when canary ingress was updated recently' do
+      before do
+        allow(::Gitlab::ApplicationRateLimiter).to receive(:throttled?) { true }
+      end
+
+      it_behaves_like 'failed request' do
+        let(:message) { "This environment's canary ingress has been updated recently. Please retry later." }
+      end
+    end
+  end
+end

lib/gitlab/application_rate_limiter.rb

@@ -33,7 +33,8 @@ def rate_limits
           group_import:                 { threshold: -> { application_settings.group_import_limit }, interval: 1.minute },
           group_testing_hook:           { threshold: 5, interval: 1.minute },
           profile_add_new_email:        { threshold: 5, interval: 1.minute },
-          profile_resend_email_confirmation:  { threshold: 5, interval: 1.minute }
+          profile_resend_email_confirmation:  { threshold: 5, interval: 1.minute },
+          update_environment_canary_ingress:  { threshold: 1, interval: 1.minute }
         }.freeze
       end

lib/gitlab/kubernetes/kube_client.rb

@@ -175,6 +175,16 @@ def get_ingresses(**args)
         end
       end
+      def patch_ingress(*args)
+        extensions_client.discover unless extensions_client.discovered
+
+        if extensions_client.respond_to?(:patch_ingress)
+          extensions_client.patch_ingress(*args)
+        else
+          networking_client.patch_ingress(*args)
+        end
+      end
+
       def create_or_update_cluster_role_binding(resource)
         update_cluster_role_binding(resource)
       end