Merge branch '62713-fix-uninstalling-cluster-apps' into 'master'

Fix connection to Tiller error while uninstalling

Closes #62713

See merge request gitlab-org/gitlab-ce!29131

changelogs/unreleased/62713-fix-uninstalling-cluster-apps.yml

+---
+title: Fix connection to Tiller error while uninstalling
+merge_request: 29131
+author:
+type: fixed

lib/gitlab/kubernetes/helm/api.rb

@@ -24,6 +24,7 @@ module Gitlab
 
         def uninstall(command)
           namespace.ensure_exists!
+          create_config_map(command)
 
           delete_pod!(command.pod_name)
           kubeclient.create_pod(command.pod_resource)

spec/lib/gitlab/kubernetes/helm/api_spec.rb

@@ -36,6 +36,8 @@ describe Gitlab::Kubernetes::Helm::Api do
   describe '#uninstall' do
     before do
       allow(client).to receive(:create_pod).and_return(nil)
+      allow(client).to receive(:get_config_map).and_return(nil)
+      allow(client).to receive(:create_config_map).and_return(nil)
       allow(client).to receive(:delete_pod).and_return(nil)
       allow(namespace).to receive(:ensure_exists!).once
     end
@@ -53,6 +55,28 @@ describe Gitlab::Kubernetes::Helm::Api do
 
       subject.uninstall(command)
     end
+
+    context 'with a ConfigMap' do
+      let(:resource) { Gitlab::Kubernetes::ConfigMap.new(application_name, files).generate }
+
+      it 'creates a ConfigMap on kubeclient' do
+        expect(client).to receive(:create_config_map).with(resource).once
+
+        subject.install(command)
+      end
+
+      context 'config map already exists' do
+        before do
+          expect(client).to receive(:get_config_map).with("values-content-configuration-#{application_name}", gitlab_namespace).and_return(resource)
+        end
+
+        it 'updates the config map' do
+          expect(client).to receive(:update_config_map).with(resource).once
+
+          subject.install(command)
+        end
+      end
+    end
   end
 
   describe '#install' do