Merge branch 'ac-k8s-namespace-validator' into 'master'

Sanitize k8s default_namespace

Closes #38692

See merge request gitlab-org/gitlab-ce!15053

app/models/project_services/kubernetes_service.rb

@@ -153,7 +153,10 @@ class KubernetesService < DeploymentService
   end
 
   def default_namespace
-    "#{project.path}-#{project.id}" if project.present?
+    return unless project
+
+    slug = "#{project.path}-#{project.id}".downcase
+    slug.gsub(/[^-a-z0-9]/, '-').gsub(/^-+/, '')
   end
 
   def build_kubeclient!(api_path: 'api', api_version: 'v1')

changelogs/unreleased/mr-14642.yml

+---
+title: Auto Devops kubernetes default namespace is now correctly built out of gitlab
+  project group-name
+merge_request: 14642
+author: Mircea Danila Dumitrescu
+type: fixed

spec/models/project_services/kubernetes_service_spec.rb

@@ -99,45 +99,34 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
   describe '#actual_namespace' do
     subject { service.actual_namespace }
 
-    it "returns the default namespace" do
-      is_expected.to eq(service.send(:default_namespace))
-    end
-
-    context 'when namespace is specified' do
-      before do
-        service.namespace = 'my-namespace'
+    shared_examples 'a correctly formatted namespace' do
+      it 'returns a valid Kubernetes namespace name' do
+        expect(subject).to match(Gitlab::Regex.kubernetes_namespace_regex)
+        expect(subject).to eq(expected_namespace)
       end
+    end
 
-      it "returns the user-namespace" do
-        is_expected.to eq('my-namespace')
-      end
+    it_behaves_like 'a correctly formatted namespace' do
+      let(:expected_namespace) { service.send(:default_namespace) }
     end
 
-    context 'when service is not assigned to project' do
+    context 'when the project path contains forbidden characters' do
       before do
-        service.project = nil
+        project.path = '-a_Strange.Path--forSure'
       end
 
-      it "does not return namespace" do
-        is_expected.to be_nil
+      it_behaves_like 'a correctly formatted namespace' do
+        let(:expected_namespace) { "a-strange-path--forsure-#{project.id}" }
       end
     end
-  end
-
-  describe '#actual_namespace' do
-    subject { service.actual_namespace }
-
-    it "returns the default namespace" do
-      is_expected.to eq(service.send(:default_namespace))
-    end
 
     context 'when namespace is specified' do
       before do
         service.namespace = 'my-namespace'
       end
 
-      it "returns the user-namespace" do
-        is_expected.to eq('my-namespace')
+      it_behaves_like 'a correctly formatted namespace' do
+        let(:expected_namespace) { 'my-namespace' }
       end
     end
 
@@ -146,7 +135,7 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
         service.project = nil
       end
 
-      it "does not return namespace" do
+      it 'does not return namespace' do
         is_expected.to be_nil
       end
     end