Do not rescue errors from state transitions

As this are un-expected errors which we should hear about from Sentry.

Still rescue StandardError when operating a Helm action as we can get
non Kubeclient errors such as SSL certificate or network errors

app/services/clusters/applications/install_service.rb

@@ -7,6 +7,13 @@ module Clusters
         return unless app.scheduled?
 
         app.make_installing!
+
+        install
+      end
+
+      private
+
+      def install
         log_event(:begin_install)
         helm_api.install(install_command)
 
@@ -18,7 +25,7 @@ module Clusters
         app.make_errored!("Kubernetes error: #{e.error_code}")
       rescue StandardError => e
         log_error(e)
-        app.make_errored!("Can't start installation process.")
+        app.make_errored!('Failed to install.')
       end
     end
   end

app/services/clusters/applications/patch_service.rb

@@ -8,6 +8,12 @@ module Clusters
 
         app.make_updating!
 
+        patch
+      end
+
+      private
+
+      def patch
         log_event(:begin_patch)
         helm_api.update(update_command)
 
@@ -16,10 +22,10 @@ module Clusters
           ClusterWaitForAppInstallationWorker::INTERVAL, app.name, app.id)
       rescue Kubeclient::HttpError => e
         log_error(e)
-        app.make_update_errored!("Kubernetes error: #{e.error_code}")
+        app.make_errored!("Kubernetes error: #{e.error_code}")
       rescue StandardError => e
         log_error(e)
-        app.make_update_errored!("Can't start update process.")
+        app.make_errored!('Failed to update.')
       end
     end
   end

app/services/clusters/applications/upgrade_service.rb

@@ -6,24 +6,28 @@ module Clusters
       def execute
         return unless app.scheduled?
 
-        begin
-          app.make_updating!
+        app.make_updating!
 
-          log_event(:begin_upgrade)
-          # install_command works with upgrades too
-          # as it basically does `helm upgrade --install`
-          helm_api.update(install_command)
+        upgrade
+      end
+
+      private
+
+      def upgrade
+        # install_command works with upgrades too
+        # as it basically does `helm upgrade --install`
+        log_event(:begin_upgrade)
+        helm_api.update(install_command)
 
-          log_event(:schedule_wait_for_upgrade)
-          ClusterWaitForAppInstallationWorker.perform_in(
-            ClusterWaitForAppInstallationWorker::INTERVAL, app.name, app.id)
-        rescue Kubeclient::HttpError => e
-          log_error(e)
-          app.make_update_errored!("Kubernetes error: #{e.error_code}")
-        rescue StandardError => e
-          log_error(e)
-          app.make_update_errored!("Can't start upgrade process.")
-        end
+        log_event(:schedule_wait_for_upgrade)
+        ClusterWaitForAppInstallationWorker.perform_in(
+          ClusterWaitForAppInstallationWorker::INTERVAL, app.name, app.id)
+      rescue Kubeclient::HttpError => e
+        log_error(e)
+        app.make_errored!("Kubernetes error: #{e.error_code}")
+      rescue StandardError => e
+        log_error(e)
+        app.make_errored!('Failed to upgrade.')
       end
     end
   end

spec/services/clusters/applications/install_service_spec.rb

@@ -58,7 +58,7 @@ describe Clusters::Applications::InstallService do
       let(:error) { StandardError.new('something bad happened') }
 
       before do
-        expect(application).to receive(:make_installing!).once.and_raise(error)
+        expect(helm_client).to receive(:install).with(install_command).and_raise(error)
       end
 
       include_examples 'logs kubernetes errors' do
@@ -68,12 +68,10 @@ describe Clusters::Applications::InstallService do
       end
 
       it 'make the application errored' do
-        expect(helm_client).not_to receive(:install)
-
         service.execute
 
         expect(application).to be_errored
-        expect(application.status_reason).to eq("Can't start installation process.")
+        expect(application.status_reason).to eq('Failed to install.')
       end
     end
   end

spec/services/clusters/applications/patch_service_spec.rb

@@ -66,16 +66,14 @@ describe Clusters::Applications::PatchService do
       end
 
       before do
-        expect(application).to receive(:make_updating!).once.and_raise(error)
+        expect(helm_client).to receive(:update).with(update_command).and_raise(error)
       end
 
       it 'make the application errored' do
-        expect(helm_client).not_to receive(:update)
-
         service.execute
 
         expect(application).to be_update_errored
-        expect(application.status_reason).to eq("Can't start update process.")
+        expect(application.status_reason).to eq('Failed to update.')
       end
     end
   end

spec/services/clusters/applications/upgrade_service_spec.rb

@@ -60,7 +60,7 @@ describe Clusters::Applications::UpgradeService do
       let(:error) { StandardError.new('something bad happened') }
 
       before do
-        expect(application).to receive(:make_updating!).once.and_raise(error)
+        expect(helm_client).to receive(:update).with(install_command).and_raise(error)
       end
 
       include_examples 'logs kubernetes errors' do
@@ -70,12 +70,10 @@ describe Clusters::Applications::UpgradeService do
       end
 
       it 'make the application errored' do
-        expect(helm_client).not_to receive(:update)
-
         service.execute
 
         expect(application).to be_update_errored
-        expect(application.status_reason).to eq("Can't start upgrade process.")
+        expect(application.status_reason).to eq('Failed to upgrade.')
       end
     end
   end