feat(placement): Add a warning notification under the placement tab when an application cannot be scheduled on any node in the cluster (#4525)

* feat(placement): Add a warning notification under the placement tab when an application cannot be scheduled on any node in the cluster

* fix(applications): if there is at least one node the application can schedule on, then do not show the warning

app/kubernetes/views/applications/edit/application.html

@@ -135,7 +135,13 @@
             </uib-tab>
 
             <uib-tab index="1" classes="btn-sm" select="ctrl.selectTab(1)">
-              <uib-tab-heading> <i class="fas fa-compress-arrows-alt space-right" aria-hidden="true"></i> Placement </uib-tab-heading>
+              <uib-tab-heading>
+                <i class="fas fa-compress-arrows-alt space-right" aria-hidden="true"></i> Placement
+                <div ng-if="ctrl.state.placementWarning">
+                  <i class="fa fa-exclamation-circle orange-icon" aria-hidden="true" style="margin-right: 2px;"></i>
+                  warning
+                </div>
+              </uib-tab-heading>
               <div class="small text-muted" style="padding: 20px;">
                 <i class="fa fa-info-circle blue-icon" aria-hidden="true" style="margin-right: 2px;"></i>
                 The placement component helps you understand whether or not this application can be deployed on a specific node.

app/kubernetes/views/applications/edit/applicationController.js

@@ -310,6 +310,7 @@ class KubernetesApplicationController {
       });
 
       this.placements = computePlacements(nodes, this.application);
+      this.state.placementWarning = _.find(this.placements, { AcceptsApplication: true }) ? false : true;
     } catch (err) {
       this.Notifications.error('Failure', err, 'Unable to retrieve application details');
     } finally {
@@ -335,6 +336,7 @@ class KubernetesApplicationController {
         name: this.$transition$.params().name,
       },
       eventWarningCount: 0,
+      placementWarning: false,
       expandedNote: false,
       useIngress: false,
       isAdmin: this.Authentication.isAdmin(),