On HTTP 500 error provide link to logs if possible

nailgun/static/js/app.js

@@ -94,6 +94,16 @@ function(models, commonViews, ClusterPage, ClustersPage, ReleasesPage, Notificat
         showSupportPage: function() {
             this.setPage(new SupportPage());
         },
+        serializeTabOptions: function(options) {
+            return _.map(options, function(value, key) {
+                return key + ':' + value;
+            }).join(',');
+        },
+        deserializeTabOptions: function(serializedOptions) {
+            return _.object(_.map(serializedOptions.split(','), function(option) {
+                return option.split(':');
+            }));
+        },
         urlify: function (text) {
             var urlRegexp = /http:(\&\#x2F\;){2}(?:(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}(?:[0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\&\#x2F\;)/g;
             return text.replace(/\n/g, '<br/>').replace(urlRegexp, function(url) {

nailgun/static/js/views/cluster_page_tabs/logs_tab.js

@@ -156,7 +156,7 @@ function(models, commonViews, logsTabTemplate, logEntryTemplate) {
 
             var options = this.getOptions();
             this.model.set({'log_options': options}, {silent: true});
-            app.navigate('#cluster/' + this.model.id + '/logs/' + this.serializeOptions(options), {trigger: false, replace: true});
+            app.navigate('#cluster/' + this.model.id + '/logs/' + app.serializeTabOptions(options), {trigger: false, replace: true});
 
             this.$('.logs-fetch-error, .node-sources-error').hide();
             if (!this.reversed) {
@@ -222,16 +222,6 @@ function(models, commonViews, logsTabTemplate, logEntryTemplate) {
                 }
             }
         },
-        serializeOptions: function(options) {
-            return _.map(options, function(value, key) {
-                return key + ':' + value;
-            }).join(',');
-        },
-        deserializeOptions: function(serializedOptions) {
-            return _.object(_.map(serializedOptions.split(','), function(option) {
-                return option.split(':');
-            }));
-        },
         getOptions: function() {
             var options = {};
             options.type = this.chosenType;
@@ -267,7 +257,7 @@ function(models, commonViews, logsTabTemplate, logEntryTemplate) {
                 // this part is run on first rendering only
                 var options = {};
                 if (this.tabOptions) {
-                    options = this.deserializeOptions(this.tabOptions);
+                    options = app.deserializeTabOptions(this.tabOptions);
                 } else if (this.model.get('log_options')) {
                     options = this.model.get('log_options');
                 }

nailgun/static/js/views/cluster_page_tabs/nodes_tab.js

@@ -3,13 +3,12 @@ define(
     'models',
     'views/common',
     'views/dialogs',
-    'views/cluster_page_tabs/logs_tab',
     'text!templates/cluster/nodes_tab_summary.html',
     'text!templates/cluster/edit_nodes_screen.html',
     'text!templates/cluster/node_list.html',
     'text!templates/cluster/node.html'
 ],
-function(models, commonViews, dialogViews, LogsTab, nodesTabSummaryTemplate, editNodesScreenTemplate, nodeListTemplate, nodeTemplate) {
+function(models, commonViews, dialogViews, nodesTabSummaryTemplate, editNodesScreenTemplate, nodeListTemplate, nodeTemplate) {
     'use strict';
     var NodesTab, NodesByRolesScreen, EditNodesScreen, AddNodesScreen, DeleteNodesScreen, NodeList, Node;
 
@@ -412,7 +411,7 @@ function(models, commonViews, dialogViews, LogsTab, nodesTabSummaryTemplate, edi
             } else if (status == 'deploying' || status == 'ready' || (status == 'error' && error == 'deploy')) {
                 options.source = 'install/puppet';
             }
-            return '#cluster/' + app.page.model.id + '/logs/' + LogsTab.prototype.serializeOptions(options);
+            return '#cluster/' + app.page.model.id + '/logs/' + app.serializeTabOptions(options);
         },
         beforeTearDown: function() {
             $('html').off(this.eventNamespace);

nailgun/static/js/views/dialogs.js

@@ -24,7 +24,14 @@ function(models, simpleMessageTemplate, createClusterDialogTemplate, changeClust
             this.$el.modal('hide');
         },
         displayErrorMessage: function () {
-            this.$('.modal-body').html(this.errorMessageTemplate());
+            var logsLink;
+            try {
+                if (app.page.model.constructor == models.Cluster) {
+                    var options = {type: 'local', source: 'nailgun', level: 'error'};
+                    logsLink = '#cluster/' + app.page.model.id + '/logs/' + app.serializeTabOptions(options);
+                }
+            } catch(e) {}
+            this.$('.modal-body').html(this.errorMessageTemplate({logsLink: logsLink}));
         },
         initialize: function(options) {
             _.defaults(this, options);

nailgun/static/templates/dialogs/error_message.html

@@ -1,3 +1,8 @@
-<div class="text-error request-failed">
-  Server error has occurred. Please contact the administrators.
-</div>
+<div class="text-error request-failed">
+  Server error has occurred.
+  <% if (logsLink)  { %>
+    Please contact the administrators or <a href="<%- logsLink %>" target="_blank">see the logs</a>.
+  <% } else { %>
+    Please contact the administrators.
+  <% } %>
+</div>