Enables ingress for uninstallation

- JupyterHub must not be available (installed or updated)

3 files changed, 12 insertions, 15 deletions

diff --git a/app/models/clusters/applications/ingress.rb b/app/models/clusters/applications/ingress.rb
index a1023f44049..1430b82c2f2 100644
--- a/app/models/clusters/applications/ingress.rb
+++ b/app/models/clusters/applications/ingress.rb
@@ -35,11 +35,8 @@ module Clusters
         'stable/nginx-ingress'
       end
 
-      # We will implement this in future MRs.
-      # Basically we need to check all dependent applications are not installed
-      # first.
       def allowed_to_uninstall?
-        false
+        external_ip_or_hostname? && application_jupyter_nil_or_installable?
       end
 
       def install_command
@@ -52,6 +49,10 @@ module Clusters
         )
       end
 
+      def external_ip_or_hostname?
+        external_ip.present? || external_hostname.present?
+      end
+
       def schedule_status_update
         return unless installed?
         return if external_ip
@@ -63,6 +64,12 @@ module Clusters
       def ingress_service
         cluster.kubeclient.get_service('ingress-nginx-ingress-controller', Gitlab::Kubernetes::Helm::NAMESPACE)
       end
+
+      private
+
+      def application_jupyter_nil_or_installable?
+        cluster.application_jupyter.nil? || cluster.application_jupyter&.installable?
+      end
     end
   end
 end
diff --git a/app/models/clusters/applications/jupyter.rb b/app/models/clusters/applications/jupyter.rb
index 9e4b87d0993..9ede0615fa3 100644
--- a/app/models/clusters/applications/jupyter.rb
+++ b/app/models/clusters/applications/jupyter.rb
@@ -23,9 +23,7 @@ module Clusters
         return unless cluster&.application_ingress_available?
 
         ingress = cluster.application_ingress
-        if ingress.external_ip || ingress.external_hostname
-          self.status = 'installable'
-        end
+        self.status = 'installable' if ingress.external_ip_or_hostname?
       end
 
       def chart
diff --git a/app/models/clusters/applications/prometheus.rb b/app/models/clusters/applications/prometheus.rb
index a6b7617b830..805c8a73f8c 100644
--- a/app/models/clusters/applications/prometheus.rb
+++ b/app/models/clusters/applications/prometheus.rb
@@ -49,14 +49,6 @@ module Clusters
         )
       end
 
-      def uninstall_command
-        Gitlab::Kubernetes::Helm::DeleteCommand.new(
-          name: name,
-          rbac: cluster.platform_kubernetes_rbac?,
-          files: files
-        )
-      end
-
       def upgrade_command(values)
         ::Gitlab::Kubernetes::Helm::InstallCommand.new(
           name: name,