Properly manage the lifecycle of allocations for storage nodes and controllers

ui/app/components/plugin-allocation-row.js

@@ -1,7 +1,23 @@
-import { alias } from '@ember/object/computed';
 import AllocationRow from 'nomad-ui/components/allocation-row';
 
 export default AllocationRow.extend({
   pluginAllocation: null,
-  allocation: alias('pluginAllocation.allocation'),
+  allocation: null,
+
+  didReceiveAttrs() {
+    this.setAllocation();
+  },
+
+  // The allocation for the plugin's controller or storage plugin needs
+  // to be imperatively fetched since these plugins are Fragments which
+  // can't have relationships.
+  async setAllocation() {
+    if (this.pluginAllocation && !this.allocation) {
+      const allocation = await this.pluginAllocation.getAllocation();
+      if (!this.isDestroyed) {
+        this.set('allocation', allocation);
+        this.updateStatsTracker();
+      }
+    }
+  },
 });