YARN-7778. Merging of placement constraints defined at different levels. Contributed by Weiwei Yang.
This commit is contained in:
Konstantinos Karanasos
parent
b6e50fad53
commit
50723889cc
@ -24,6 +24,8 @@
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.List;
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import java.util.ArrayList;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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@ -33,6 +35,7 @@
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.yarn.api.records.ApplicationId;
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import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
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import org.apache.hadoop.yarn.api.resource.PlacementConstraints;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@ -236,6 +239,45 @@ public PlacementConstraint getGlobalConstraint(Set<String> sourceTags) {
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}
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}
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@Override
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public PlacementConstraint getMultilevelConstraint(ApplicationId appId,
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Set<String> sourceTags, PlacementConstraint schedulingRequestConstraint) {
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List<PlacementConstraint> constraints = new ArrayList<>();
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// Add scheduling request-level constraint.
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if (schedulingRequestConstraint != null) {
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constraints.add(schedulingRequestConstraint);
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}
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// Add app-level constraint if appId is given.
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if (appId != null && sourceTags != null
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&& !sourceTags.isEmpty()) {
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constraints.add(getConstraint(appId, sourceTags));
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}
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// Add global constraint.
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if (sourceTags != null && !sourceTags.isEmpty()) {
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constraints.add(getGlobalConstraint(sourceTags));
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}
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// Remove all null or duplicate constraints.
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List<PlacementConstraint.AbstractConstraint> allConstraints =
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constraints.stream()
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.filter(placementConstraint -> placementConstraint != null
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&& placementConstraint.getConstraintExpr() != null)
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.map(PlacementConstraint::getConstraintExpr)
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.distinct()
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.collect(Collectors.toList());
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// Compose an AND constraint
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// When merge request(RC), app(AC) and global constraint(GC),
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// we do a merge on them with CC=AND(GC, AC, RC) and returns a
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// composite AND constraint. Subsequently we check if CC could
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// be satisfied. This ensures that every level of constraint
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// is satisfied.
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PlacementConstraint.And andConstraint = PlacementConstraints.and(
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allConstraints.toArray(new PlacementConstraint
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.AbstractConstraint[allConstraints.size()]));
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return andConstraint.build();
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}
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@Override
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public void unregisterApplication(ApplicationId appId) {
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try {
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@ -104,6 +104,19 @@ PlacementConstraint getConstraint(ApplicationId appId,
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*/
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PlacementConstraint getGlobalConstraint(Set<String> sourceTags);
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/**
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* Consider all levels of constraints (scheduling request, app, cluster) and
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* return a merged constraint.
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*
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* @param applicationId application ID
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* @param sourceTags a set of source allocation tags
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* @param schedulingRequestConstraint placement constraint at scheduling
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* request level
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* @return a merged placement constraint
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*/
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PlacementConstraint getMultilevelConstraint(ApplicationId applicationId,
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Set<String> sourceTags, PlacementConstraint schedulingRequestConstraint);
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/**
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* Remove the constraints that correspond to a given application.
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*
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@ -248,22 +248,14 @@ public static boolean canSatisfyConstraints(ApplicationId applicationId,
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SchedulingRequest request, SchedulerNode schedulerNode,
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PlacementConstraintManager pcm, AllocationTagsManager atm)
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throws InvalidAllocationTagsQueryException {
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// TODO do proper merge on different level of constraints, see YARN-7778.
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// Request level constraint
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PlacementConstraint constraint = request.getPlacementConstraint();
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if (constraint == null) {
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// Application level constraint
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constraint = pcm.getConstraint(applicationId,
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request.getAllocationTags());
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if (constraint == null) {
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// Global level constraint
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constraint = pcm.getGlobalConstraint(request.getAllocationTags());
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if (constraint == null) {
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return true;
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}
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}
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}
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return canSatisfyConstraints(applicationId, constraint, schedulerNode, atm);
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Set<String> sourceTags = null;
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PlacementConstraint pc = null;
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if (request != null) {
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sourceTags = request.getAllocationTags();
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pc = request.getPlacementConstraint();
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}
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return canSatisfyConstraints(applicationId,
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pcm.getMultilevelConstraint(applicationId, sourceTags, pc),
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schedulerNode, atm);
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}
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}
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@ -34,8 +34,11 @@
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import com.google.common.collect.Sets;
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import org.apache.hadoop.yarn.api.records.ApplicationId;
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import org.apache.hadoop.yarn.api.records.SchedulingRequest;
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import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
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import org.apache.hadoop.yarn.api.resource.PlacementConstraint.And;
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import org.apache.hadoop.yarn.api.resource.PlacementConstraints;
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import org.apache.hadoop.yarn.server.utils.BuilderUtils;
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import org.junit.Assert;
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@ -179,4 +182,83 @@ public void testValidateConstraint() {
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Assert.assertTrue(pcm.validateConstraint(sourceTag1, c1));
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Assert.assertFalse(pcm.validateConstraint(sourceTag4, c1));
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}
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@Test
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public void testGetRequestConstraint() {
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// Request Constraint(RC), App Constraint(AC), Global Constraint(GC)
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PlacementConstraint constraint;
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And mergedConstraint;
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SchedulingRequest request;
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// RC = c1
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// AC = null
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// GC = null
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constraint = pcm.getMultilevelConstraint(appId1, null, c1);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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Assert.assertEquals(1, mergedConstraint.getChildren().size());
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Assert.assertEquals(c1, mergedConstraint.getChildren().get(0).build());
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// RC = null
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// AC = tag1->c1, tag2->c2
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// GC = null
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pcm.registerApplication(appId1, constraintMap1);
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// if the source tag in the request is not mapped to any existing
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// registered constraint, we should get an empty AND constraint.
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constraint = pcm.getMultilevelConstraint(appId1,
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Sets.newHashSet("not_exist_tag"), null);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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// AND()
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Assert.assertEquals(0, mergedConstraint.getChildren().size());
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// if a mapping is found for a given source tag
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constraint = pcm.getMultilevelConstraint(appId1, sourceTag1, null);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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// AND(c1)
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Assert.assertEquals(1, mergedConstraint.getChildren().size());
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Assert.assertEquals(c1, mergedConstraint.getChildren().get(0).build());
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pcm.unregisterApplication(appId1);
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// RC = null
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// AC = null
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// GC = tag1->c1
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pcm.addGlobalConstraint(sourceTag1, c1, true);
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constraint = pcm.getMultilevelConstraint(appId1,
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Sets.newHashSet(sourceTag1), null);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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// AND(c1)
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Assert.assertEquals(1, mergedConstraint.getChildren().size());
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Assert.assertEquals(c1, mergedConstraint.getChildren().get(0).build());
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pcm.removeGlobalConstraint(sourceTag1);
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// RC = c2
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// AC = tag1->c1, tag2->c2
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// GC = tag1->c3
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pcm.addGlobalConstraint(sourceTag1, c3, true);
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pcm.registerApplication(appId1, constraintMap1);
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// both RC, AC and GC should be respected
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constraint = pcm.getMultilevelConstraint(appId1, sourceTag1, c2);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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// AND(c1, c2, c3)
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Assert.assertEquals(3, mergedConstraint.getChildren().size());
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pcm.removeGlobalConstraint(sourceTag1);
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pcm.unregisterApplication(appId1);
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// RC = c1
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// AC = tag1->c1, tag2->c2
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// GC = tag1->c2
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pcm.addGlobalConstraint(sourceTag1, c2, true);
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pcm.registerApplication(appId1, constraintMap1);
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constraint = pcm.getMultilevelConstraint(appId1,
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Sets.newHashSet(sourceTag1), c1);
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Assert.assertTrue(constraint.getConstraintExpr() instanceof And);
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mergedConstraint = (And) constraint.getConstraintExpr();
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// AND(c1, c2)
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Assert.assertEquals(2, mergedConstraint.getChildren().size());
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pcm.removeGlobalConstraint(sourceTag1);
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pcm.unregisterApplication(appId1);
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}
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}
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@ -36,6 +36,8 @@
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import org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.TestUtils;
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import org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.AllocationTagsManager;
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import org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.InvalidAllocationTagsQueryException;
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import org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.MemoryPlacementConstraintManager;
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import org.apache.hadoop.yarn.server.resourcemanager.scheduler.constraint.PlacementConstraintManager;
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import org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey;
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import org.junit.Assert;
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import org.junit.Before;
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@ -76,10 +78,13 @@ public void setup() throws Exception {
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// Create allocation tags manager
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AllocationTagsManager allocationTagsManager = new AllocationTagsManager(
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rmContext);
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PlacementConstraintManager placementConstraintManager =
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new MemoryPlacementConstraintManager();
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spyAllocationTagsManager = spy(allocationTagsManager);
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schedulerRequestKey = new SchedulerRequestKey(Priority.newInstance(1), 2L,
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TestUtils.getMockContainerId(1, 1));
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rmContext.setAllocationTagsManager(spyAllocationTagsManager);
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rmContext.setPlacementConstraintManager(placementConstraintManager);
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// Create allocator
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allocator = new SingleConstraintAppPlacementAllocator();
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