Improve client stat simulation and add a chance for requests to error

ui/mirage/config.js

@@ -307,7 +307,17 @@ export default function() {
   this.get('/client/fs/logs/:allocation_id', clientAllocationLog);
 
   this.get('/client/stats', function({ clientStats }, { queryParams }) {
-    return this.serialize(clientStats.find(queryParams.node_id));
+    const seed = Math.random();
+    if (seed > 0.8) {
+      const stats = clientStats.find(queryParams.node_id);
+      stats.update({
+        timestamp: Date.now() * 1000000,
+        CPUTicksConsumed: stats.CPUTicksConsumed + (Math.random() * 20 - 10),
+      });
+      return this.serialize(stats);
+    } else {
+      return new Response(500, {}, null);
+    }
   });
 
   // TODO: in the future, this hack may be replaceable with dynamic host name

ui/mirage/factories/client-stats.js

@@ -23,7 +23,7 @@ export default Factory.extend({
       })),
   ],
 
-  CPUTicksConsumed: 1000000,
+  CPUTicksConsumed: faker.random.number({ min: 100, max: 1000 }),
 
   diskStats: () => [
     Array(faker.random.number({ min: 1, max: 5 }))
@@ -46,6 +46,6 @@ export default Factory.extend({
     Used: 10000000000,
   }),
 
-  timestamp: 149000000000,
+  timestamp: Date.now() * 1000000,
   uptime: 193838,
 });

ui/mirage/factories/node.js

@@ -1,6 +1,6 @@
 import { Factory, faker, trait } from 'ember-cli-mirage';
 import { provide } from '../utils';
-import { DATACENTERS, HOSTS } from '../common';
+import { DATACENTERS, HOSTS, generateResources } from '../common';
 import moment from 'moment';
 
 const UUIDS = provide(100, faker.random.uuid.bind(faker.random));
@@ -65,6 +65,8 @@ export default Factory.extend({
 
   drivers: makeDrivers,
 
+  resources: generateResources,
+
   attributes() {
     // TODO add variability to these
     return {