feat(k8s/container): realtime metrics (#4416)

* feat(k8s/container): metrics layout

* feat(k8s/container): memory graph

* feat(k8s/container): cpu usage percent

* feat(k8s/metrics): metrics api validation to enable metrics server

* feat(k8s/pods): update error metrics view

* feat(k8s/container): improve stopRepeater function

* feat(k8s/pods): display empty view instead of empty graphs

* feat(k8s/pods): fix CPU usage

* feat(k8s/configure): fix the metrics server test

* feat(k8s/pod): fix cpu issue

* feat(k8s/pod): fix toaster for non register pods in metrics server

* feat(k8s/service): remove options before 30 secondes for refresh rate

* feat(k8s/pod): fix default value for the refresh rate

* feat(k8s/pod): fix rebase

app/kubernetes/components/datatables/application/containers-datatable/containersDatatable.html

@@ -131,6 +131,13 @@
               </td>
               <td>{{ item.CreationDate | getisodate }}</td>
               <td>
+                <a
+                  ng-if="item.Status === 'Running' && $ctrl.useServerMetrics"
+                  ui-sref="kubernetes.applications.application.stats({ pod: item.PodName, container: item.Name })"
+                  style="margin-right: 10px;"
+                >
+                  <i class="fa fa-chart-area" aria-hidden="true"></i> Stats
+                </a>
                 <a ui-sref="kubernetes.applications.application.logs({ pod: item.PodName, container: item.Name })"> <i class="fa fa-file-alt" aria-hidden="true"></i> Logs </a>
                 <a ng-if="item.Status === 'Running'" ui-sref="kubernetes.applications.application.console({ pod: item.PodName, container: item.Name })" style="margin-left: 10px;">
                   <i class="fa fa-terminal" aria-hidden="true"></i> Console

app/kubernetes/components/datatables/application/containers-datatable/containersDatatable.js

@@ -9,5 +9,6 @@ angular.module('portainer.kubernetes').component('kubernetesContainersDatatable'
     orderBy: '@',
     refreshCallback: '<',
     isPod: '<',
+    useServerMetrics: '<',
   },
 });