UI: Preemptions

ui/app/controllers/allocations/allocation/index.js

@@ -1,6 +1,6 @@
-import { alias } from '@ember/object/computed';
 import Controller from '@ember/controller';
 import { inject as service } from '@ember/service';
+import { alias } from '@ember/object/computed';
 import Sortable from 'nomad-ui/mixins/sortable';
 import { lazyClick } from 'nomad-ui/helpers/lazy-click';
 
@@ -18,6 +18,9 @@ export default Controller.extend(Sortable, {
   listToSort: alias('model.states'),
   sortedStates: alias('listSorted'),
 
+  // Set in the route
+  preempter: null,
+
   actions: {
     gotoTask(allocation, task) {
       this.transitionToRoute('allocations.allocation.task', task);

ui/app/controllers/clients/client.js

@@ -10,6 +10,7 @@ export default Controller.extend(Sortable, Searchable, {
     searchTerm: 'search',
     sortProperty: 'sort',
     sortDescending: 'desc',
+    onlyPreemptions: 'preemptions',
   },
 
   currentPage: 1,
@@ -20,10 +21,25 @@ export default Controller.extend(Sortable, Searchable, {
 
   searchProps: computed(() => ['shortId', 'name']),
 
-  listToSort: alias('model.allocations'),
+  onlyPreemptions: false,
+
+  visibleAllocations: computed(
+    'model.allocations.[]',
+    'preemptions.[]',
+    'onlyPreemptions',
+    function() {
+      return this.onlyPreemptions ? this.preemptions : this.model.allocations;
+    }
+  ),
+
+  listToSort: alias('visibleAllocations'),
   listToSearch: alias('listSorted'),
   sortedAllocations: alias('listSearched'),
 
+  preemptions: computed('model.allocations.@each.wasPreempted', function() {
+    return this.model.allocations.filterBy('wasPreempted');
+  }),
+
   sortedEvents: computed('model.events.@each.time', function() {
     return this.get('model.events')
       .sortBy('time')
@@ -38,5 +54,9 @@ export default Controller.extend(Sortable, Searchable, {
     gotoAllocation(allocation) {
       this.transitionToRoute('allocations.allocation', allocation);
     },
+
+    setPreemptionFilter(value) {
+      this.set('onlyPreemptions', value);
+    },
   },
 });

ui/app/models/allocation.js

@@ -3,7 +3,7 @@ import { computed } from '@ember/object';
 import { equal } from '@ember/object/computed';
 import Model from 'ember-data/model';
 import attr from 'ember-data/attr';
-import { belongsTo } from 'ember-data/relationships';
+import { belongsTo, hasMany } from 'ember-data/relationships';
 import { fragment, fragmentArray } from 'ember-data-model-fragments/attributes';
 import intersection from 'lodash.intersection';
 import shortUUIDProperty from '../utils/properties/short-uuid';
@@ -46,6 +46,10 @@ export default Model.extend({
   previousAllocation: belongsTo('allocation', { inverse: 'nextAllocation' }),
   nextAllocation: belongsTo('allocation', { inverse: 'previousAllocation' }),
 
+  preemptedAllocations: hasMany('allocation', { inverse: 'preemptedByAllocation' }),
+  preemptedByAllocation: belongsTo('allocation', { inverse: 'preemptedAllocations' }),
+  wasPreempted: attr('boolean'),
+
   followUpEvaluation: belongsTo('evaluation'),
 
   statusClass: computed('clientStatus', function() {
@@ -88,9 +92,11 @@ export default Model.extend({
     'clientStatus',
     'followUpEvaluation.content',
     function() {
-      return !this.get('nextAllocation.content') &&
-      !this.get('followUpEvaluation.content') &&
-      this.clientStatus === 'failed';
+      return (
+        !this.get('nextAllocation.content') &&
+        !this.get('followUpEvaluation.content') &&
+        this.clientStatus === 'failed'
+      );
     }
   ),
 });

ui/app/models/job-plan.js

@@ -1,8 +1,10 @@
 import Model from 'ember-data/model';
 import attr from 'ember-data/attr';
 import { fragmentArray } from 'ember-data-model-fragments/attributes';
+import { hasMany } from 'ember-data/relationships';
 
 export default Model.extend({
   diff: attr(),
   failedTGAllocs: fragmentArray('placement-failure', { defaultValue: () => [] }),
+  preemptions: hasMany('allocation'),
 });

ui/app/routes/allocations/allocation/index.js

@@ -0,0 +1,13 @@
+import Route from '@ember/routing/route';
+
+export default Route.extend({
+  setupController(controller, model) {
+    // Suppress the preemptedByAllocation fetch error in the event it's a 404
+    if (model) {
+      const setPreempter = () => controller.set('preempter', model.preemptedByAllocation);
+      model.preemptedByAllocation.then(setPreempter, setPreempter);
+    }
+
+    return this._super(...arguments);
+  },
+});

ui/app/serializers/allocation.js

@@ -45,6 +45,10 @@ export default ApplicationSerializer.extend({
     hash.NextAllocationID = hash.NextAllocation ? hash.NextAllocation : null;
     hash.FollowUpEvaluationID = hash.FollowupEvalID ? hash.FollowupEvalID : null;
 
+    hash.PreemptedAllocationIDs = hash.PreemptedAllocations || [];
+    hash.PreemptedByAllocationID = hash.PreemptedByAllocation || null;
+    hash.WasPreempted = !!hash.PreemptedByAllocationID;
+
     return this._super(typeHash, hash);
   },
 });

ui/app/serializers/job-plan.js

@@ -1,12 +1,14 @@
 import { assign } from '@ember/polyfills';
 import ApplicationSerializer from './application';
+import { get } from '@ember/object';
 
 export default ApplicationSerializer.extend({
   normalize(typeHash, hash) {
     const failures = hash.FailedTGAllocs || {};
     hash.FailedTGAllocs = Object.keys(failures).map(key => {
       return assign({ Name: key }, failures[key] || {});
     });
+    hash.PreemptionIDs = (get(hash, 'Annotations.PreemptedAllocs') || []).mapBy('ID');
     return this._super(...arguments);
   },
 });

ui/app/styles/components/badge.scss

@@ -4,6 +4,7 @@
   line-height: 1;
   border-radius: $radius;
   padding: 0.25em 0.75em;
+  border: none;
 
   @each $name, $pair in $colors {
     $color: nth($pair, 1);
@@ -43,3 +44,7 @@
     background: lighten($grey-blue, 10%);
   }
 }
+
+button.badge {
+  cursor: pointer;
+}

ui/app/styles/components/page-layout.scss

@@ -36,7 +36,6 @@
 
       &.is-right {
         margin-left: $gutter-width;
-        overflow-x: auto;
       }
 
       @media #{$mq-hidden-gutter} {

ui/app/styles/core/table.scss

@@ -14,6 +14,10 @@
     }
   }
 
+  &.is-isolated {
+    margin-bottom: 0;
+  }
+
   &.with-foot {
     margin-bottom: 0;
     border-bottom-left-radius: 0;

ui/app/templates/allocations/allocation/index.hbs

@@ -87,4 +87,74 @@
       </div>
     </div>
   {{/if}}
+
+  {{#if model.wasPreempted}}
+    <div class="boxed-section is-warning" data-test-was-preempted>
+      <div class="boxed-section-head">Preempted By</div>
+      <div class="boxed-section-body">
+        {{#if (not preempter)}}
+          <div class="empty-message">
+            <h3 class="empty-message-headline">Allocation is gone</h3>
+            <p class="empty-message-body">This allocation has been stopped and garbage collected.</p>
+          </div>
+        {{else}}
+          <div class="boxed-section is-small">
+            <div class="boxed-section-body inline-definitions">
+              <span class="pair">
+                <span data-test-allocation-status class="tag {{preempter.statusClass}}">
+                  {{preempter.clientStatus}}
+                </span>
+              </span>
+              <span class="pair">
+                <span class="term" data-test-allocation-name>{{preempter.name}}</span>
+                {{#link-to "allocations.allocation" preempter data-test-allocation-id}}{{preempter.shortId}}{{/link-to}}
+              </span>
+              <span class="pair job-link"><span class="term">Job</span>
+                {{#link-to "jobs.job" preempter.job (query-params jobNamespace=preempter.job.namespace.id) data-test-job-link}}{{preempter.job.name}}{{/link-to}}
+              </span>
+              <span class="pair job-priority"><span class="term">Priority</span>
+                <span data-test-job-priority>{{preempter.job.priority}}</span>
+              </span>
+              <span class="pair node-link"><span class="term">Client</span>
+                {{#link-to "clients.client" preempter.node data-test-client-link}}{{preempter.node.shortId}}{{/link-to}}
+              </span>
+              <span class="pair"><span class="term">Reserved CPU</span>
+                <span data-test-allocation-cpu>{{preempter.resources.cpu}} MHz</span>
+              </span>
+              <span class="pair"><span class="term">Reserved Memory</span>
+                <span data-test-allocation-memory>{{preempter.resources.memory}} MiB</span>
+              </span>
+            </div>
+          </div>
+        {{/if}}
+      </div>
+    </div>
+  {{/if}}
+
+  {{#if (and model.preemptedAllocations.isFulfilled model.preemptedAllocations.length)}}
+    <div class="boxed-section" data-test-preemptions>
+      <div class="boxed-section-head">Preempted Allocations</div>
+      <div class="boxed-section-body">
+        {{#list-table
+          source=model.preemptedAllocations
+          class="allocations is-isolated" as |t|}}
+          {{#t.head}}
+            <th class="is-narrow"></th>
+            <th>ID</th>
+            <th>Task Group</th>
+            <th>Created</th>
+            <th>Modified</th>
+            <th>Status</th>
+            <th>Version</th>
+            <th>Node</th>
+            <th>CPU</th>
+            <th>Memory</th>
+          {{/t.head}}
+          {{#t.body as |row|}}
+            {{allocation-row allocation=row.model context="job" data-test-allocation=row.model.id}}
+          {{/t.body}}
+        {{/list-table}}
+      </div>
+    </div>
+  {{/if}}
 </section>

ui/app/templates/clients/client.hbs

@@ -95,7 +95,17 @@
 
   <div class="boxed-section">
     <div class="boxed-section-head">
-      <div>Allocations <span class="badge is-white">{{model.allocations.length}}</span></div>
+      <div>
+        Allocations
+        <button role="button" class="badge is-white" onclick={{action "setPreemptionFilter" false}} data-test-filter-all>
+          {{model.allocations.length}}
+        </button>
+        {{#if preemptions.length}}
+          <button role="button" class="badge is-warning" onclick={{action "setPreemptionFilter" true}} data-test-filter-preemptions>
+            {{preemptions.length}} {{pluralize "preemption" preemptions.length}}
+          </button>
+        {{/if}}
+      </div>
       {{search-box
         searchTerm=(mut searchTerm)
         onChange=(action resetPagination)

ui/app/templates/components/allocation-row.hbs

@@ -9,6 +9,11 @@
       {{x-icon "history" class="is-faded"}}
     </span>
   {{/if}}
+  {{#if allocation.wasPreempted}}
+    <span data-test-icon="preemption" class="tooltip text-center" role="tooltip" aria-label="Allocation was preempted">
+      {{x-icon "boot" class="is-faded"}}
+    </span>
+  {{/if}}
 </td>
 <td data-test-short-id>
   {{#link-to "allocations.allocation" allocation class="is-primary"}}

ui/app/templates/components/job-editor.hbs

@@ -88,6 +88,34 @@
       {{/if}}
     </div>
   </div>
+  {{#if (and planOutput.preemptions.isFulfilled planOutput.preemptions.length)}}
+    <div class="boxed-section is-warning" data-test-preemptions>
+      <div class="boxed-section-head" data-test-preemptions-title>
+        Preemptions (if you choose to run this job, these allocations will be stopped)
+      </div>
+      <div class="boxed-section-body" data-test-preemptions-body>
+        {{#list-table
+          source=planOutput.preemptions
+          class="allocations is-isolated" as |t|}}
+          {{#t.head}}
+            <th class="is-narrow"></th>
+            <th>ID</th>
+            <th>Task Group</th>
+            <th>Created</th>
+            <th>Modified</th>
+            <th>Status</th>
+            <th>Version</th>
+            <th>Node</th>
+            <th>CPU</th>
+            <th>Memory</th>
+          {{/t.head}}
+          {{#t.body as |row|}}
+            {{allocation-row allocation=row.model context="job"}}
+          {{/t.body}}
+        {{/list-table}}
+      </div>
+    </div>
+  {{/if}}
   <div class="content is-associative">
     <button class="button is-primary {{if submit.isRunning "is-loading"}}" type="button" onclick={{perform submit}} disabled={{submit.isRunning}} data-test-run>Run</button>
     <button class="button is-light" type="button" onclick={{action reset}} data-test-cancel>Cancel</button>

ui/mirage/factories/allocation.js

@@ -124,6 +124,20 @@ export default Factory.extend({
     },
   }),
 
+  preempted: trait({
+    afterCreate(allocation, server) {
+      const preempter = server.create('allocation', { preemptedAllocations: [allocation.id] });
+      allocation.update({ preemptedByAllocation: preempter.id });
+    },
+  }),
+
+  preempter: trait({
+    afterCreate(allocation, server) {
+      const preempted = server.create('allocation', { preemptedByAllocation: allocation.id });
+      allocation.update({ preemptedAllocations: [preempted.id] });
+    },
+  }),
+
   afterCreate(allocation, server) {
     Ember.assert(
       '[Mirage] No jobs! make sure jobs are created before allocations',