feat(k8s/applications): expose applications via ingress (#4136)

* feat(k8s/endpoint): expose ingress controllers on endpoints

* feat(k8s/applications): add ability to expose applications over ingress - missing RP and app edits

* feat(k8s/application): add validation for ingress routes

* feat(k8s/resource-pools): edit available ingress classes

* fix(k8s/ingress): var name refactor was partially applied

* feat(kubernetes): double validation on RP edit

* feat(k8s/application): app edit ingress update + formvalidation + UI rework

* feat(k8s/ingress): dictionary for default annotations on ingress creation

* fix(k8s/application): temporary fix + TODO dev notice

* feat(k8s/application): select default ingress of selected resource pool

* feat(k8s/ingress): revert ingressClassName removal

* feat(k8s/ingress): admins can now add an host to ingress in a resource pool

* feat(k8s/resource-pool): list applications using RP ingresses

* feat(k8s/configure): minor UI update

* feat(k8s/configure): minor UI update

* feat(k8s/configure): minor UI update

* feat(k8s/configure): minor UI update

* feat(k8s/configure): minor UI update

* fix(k8s/ingresses): remove host if undefined

* feat(k8s/resource-pool): remove the activate ingresses switch

* fix(k8s/resource-pool): edditing an ingress host was deleting all the routes of the ingress

* feat(k8s/application): prevent app deploy if no ports to publish and publishing type not internal

* feat(k8s/ingress): minor UI update

* fix(k8s/ingress): allow routes without prepending /

* feat(k8s/application): add form validation on ingress route

Co-authored-by: Anthony Lapenna <lapenna.anthony@gmail.com>

app/kubernetes/views/configure/configure.html

@@ -11,12 +11,12 @@
         <rd-widget-body>
           <form class="form-horizontal">
             <div class="col-sm-12 form-section-title">
-              Expose applications over external IP addresses
+              Networking
             </div>
 
             <div class="form-group">
               <span class="col-sm-12 text-muted small">
-                Enabling this feature will allow users to expose application they deploy over an external IP address assigned by cloud provider.
+                Enabling the load balancer feature will allow users to expose application they deploy over an external IP address assigned by cloud provider.
                 <p style="margin-top: 2px;">
                   <i class="fa fa-exclamation-circle orange-icon" aria-hidden="true" style="margin-right: 2px;"></i>
                   Ensure that your cloud provider allows you to create load balancers if you want to use this feature. Might incur costs.
@@ -32,6 +32,37 @@
               </div>
             </div>
 
+            <div class="form-group">
+              <span class="col-sm-12 text-muted small">
+                Enabling the ingress feature will allow users to expose application they deploy over a HTTP route.<br />
+                <p style="margin-top: 2px;">
+                  <i class="fa fa-exclamation-circle orange-icon" aria-hidden="true" style="margin-right: 2px;"></i>
+                  Ingress classes (controllers) must be manually specified for each one you want to use in the cluster. Make sure that each controller is running inside your
+                  cluster.
+                </p>
+              </span>
+            </div>
+            <div class="form-group">
+              <div class="col-sm-12">
+                <label class="control-label text-left">
+                  Allow users to use ingress
+                </label>
+                <label class="switch" style="margin-left: 20px;"> <input type="checkbox" ng-model="ctrl.formValues.UseIngress" /><i></i> </label>
+              </div>
+            </div>
+            <div class="form-group" ng-if="ctrl.formValues.UseIngress">
+              <label for="ingress_classes" class="col-sm-3 col-lg-2 control-label text-left">
+                Ingress controllers
+              </label>
+              <div class="col-sm-9 col-lg-10">
+                <input type="text" class="form-control" id="ingress_classes" ng-model="ctrl.formValues.IngressClasses" placeholder="nginx,gce,traefik" />
+              </div>
+              <span class="col-sm-12 text-muted small" style="margin-top: 12px;">
+                <i class="fa fa-info-circle blue-icon" aria-hidden="true" style="margin-right: 2px;"></i>
+                Once configured, ingresses can be created at the resource pool level.
+              </span>
+            </div>
+
             <div class="col-sm-12 form-section-title">
               Metrics
             </div>
@@ -46,7 +77,6 @@
                 </p>
               </span>
             </div>
-
             <div class="form-group">
               <div class="col-sm-12">
                 <label class="control-label text-left">