Moves domain setting to Cluster setting

Changes domain field to be on the Cluster page show, removing it from
Auto DevOps setting. Also injects the new environment variable
KUBE_INGRESS_BASE_DOMAIN into kubernetes#predefined_variables.

Migration to move the information from ProjectAutoDevops#domain
to Clusters::Cluster#domain. As well as necessary modifications to qa
selectors

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/52363

1 files changed, 13 insertions, 0 deletions

diff --git a/spec/models/clusters/platforms/kubernetes_spec.rb b/spec/models/clusters/platforms/kubernetes_spec.rb
index 6c8a223092e..c273fa7e164 100644
--- a/spec/models/clusters/platforms/kubernetes_spec.rb
+++ b/spec/models/clusters/platforms/kubernetes_spec.rb
@@ -297,6 +297,19 @@ describe Clusters::Platforms::Kubernetes, :use_clean_rails_memory_store_caching
         end
       end
     end
+
+    context 'with a domain' do
+      let!(:cluster) do
+        create(:cluster, :provided_by_gcp, :with_domain,
+               platform_kubernetes: kubernetes)
+      end
+
+      it 'sets KUBE_INGRESS_BASE_DOMAIN' do
+        expect(subject).to include(
+          { key: 'KUBE_INGRESS_BASE_DOMAIN', value: cluster.domain, public: true }
+        )
+      end
+    end
   end
 
   describe '#terminals' do