YARN-6595. [API] Add Placement Constraints at the application level. (Arun Suresh via kkaranasos)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/RegisterApplicationMasterRequest.java

@@ -18,11 +18,16 @@
 
 package org.apache.hadoop.yarn.api.protocolrecords;
 
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
 import org.apache.hadoop.classification.InterfaceAudience.Public;
 import org.apache.hadoop.classification.InterfaceStability.Stable;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
+import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
 import org.apache.hadoop.yarn.util.Records;
-
 /**
  * The request sent by the {@code ApplicationMaster} to {@code ResourceManager}
  * on registration.
@@ -132,4 +137,39 @@ public static RegisterApplicationMasterRequest newInstance(String host,
   @Public
   @Stable
   public abstract void setTrackingUrl(String trackingUrl);
+
+  /**
+   * Return all Placement Constraints specified at the Application level. The
+   * mapping is from a set of allocation tags to a
+   * <code>PlacementConstraint</code> associated with the tags, i.e., each
+   * {@link org.apache.hadoop.yarn.api.records.SchedulingRequest} that has those
+   * tags will be placed taking into account the corresponding constraint.
+   *
+   * @return A map of Placement Constraints.
+   */
+  @Public
+  @Unstable
+  public Map<Set<String>, PlacementConstraint> getPlacementConstraints() {
+    return new HashMap<>();
+  }
+
+  /**
+   * Set Placement Constraints applicable to the
+   * {@link org.apache.hadoop.yarn.api.records.SchedulingRequest}s
+   * of this application.
+   * The mapping is from a set of allocation tags to a
+   * <code>PlacementConstraint</code> associated with the tags.
+   * For example:
+   *  Map &lt;
+   *   &lt;hb_regionserver&gt; -&gt; node_anti_affinity,
+   *   &lt;hb_regionserver, hb_master&gt; -&gt; rack_affinity,
+   *   ...
+   *  &gt;
+   * @param placementConstraints Placement Constraint Mapping.
+   */
+  @Public
+  @Unstable
+  public void setPlacementConstraints(
+      Map<Set<String>, PlacementConstraint> placementConstraints) {
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/resource/PlacementConstraint.java

@@ -54,6 +54,26 @@ public AbstractConstraint getConstraintExpr() {
     return constraintExpr;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (!(o instanceof PlacementConstraint)) {
+      return false;
+    }
+
+    PlacementConstraint that = (PlacementConstraint) o;
+
+    return getConstraintExpr() != null ? getConstraintExpr().equals(that
+        .getConstraintExpr()) : that.getConstraintExpr() == null;
+  }
+
+  @Override
+  public int hashCode() {
+    return getConstraintExpr() != null ? getConstraintExpr().hashCode() : 0;
+  }
+
   /**
    * Interface used to enable the elements of the constraint tree to be visited.
    */
@@ -173,6 +193,38 @@ public Set<TargetExpression> getTargetExpressions() {
       return targetExpressions;
     }
 
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (!(o instanceof SingleConstraint)) {
+        return false;
+      }
+
+      SingleConstraint that = (SingleConstraint) o;
+
+      if (getMinCardinality() != that.getMinCardinality()) {
+        return false;
+      }
+      if (getMaxCardinality() != that.getMaxCardinality()) {
+        return false;
+      }
+      if (!getScope().equals(that.getScope())) {
+        return false;
+      }
+      return getTargetExpressions().equals(that.getTargetExpressions());
+    }
+
+    @Override
+    public int hashCode() {
+      int result = getScope().hashCode();
+      result = 31 * result + getMinCardinality();
+      result = 31 * result + getMaxCardinality();
+      result = 31 * result + getTargetExpressions().hashCode();
+      return result;
+    }
+
     @Override
     public <T> T accept(Visitor<T> visitor) {
       return visitor.visit(this);
@@ -331,6 +383,34 @@ public Set<TargetExpression> getTargetExpressions() {
       return targetExpressions;
     }
 
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (!(o instanceof TargetConstraint)) {
+        return false;
+      }
+
+      TargetConstraint that = (TargetConstraint) o;
+
+      if (getOp() != that.getOp()) {
+        return false;
+      }
+      if (!getScope().equals(that.getScope())) {
+        return false;
+      }
+      return getTargetExpressions().equals(that.getTargetExpressions());
+    }
+
+    @Override
+    public int hashCode() {
+      int result = getOp().hashCode();
+      result = 31 * result + getScope().hashCode();
+      result = 31 * result + getTargetExpressions().hashCode();
+      return result;
+    }
+
     @Override
     public <T> T accept(Visitor<T> visitor) {
       return visitor.visit(this);
@@ -388,6 +468,34 @@ public int getMaxCardinality() {
     public <T> T accept(Visitor<T> visitor) {
       return visitor.visit(this);
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+
+      CardinalityConstraint that = (CardinalityConstraint) o;
+
+      if (minCardinality != that.minCardinality) {
+        return false;
+      }
+      if (maxCardinality != that.maxCardinality) {
+        return false;
+      }
+      return scope != null ? scope.equals(that.scope) : that.scope == null;
+    }
+
+    @Override
+    public int hashCode() {
+      int result = scope != null ? scope.hashCode() : 0;
+      result = 31 * result + minCardinality;
+      result = 31 * result + maxCardinality;
+      return result;
+    }
   }
 
   /**
@@ -406,6 +514,25 @@ public abstract static class CompositeConstraint<R extends Visitable>
      * @return the children of the composite constraint
      */
     public abstract List<R> getChildren();
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+
+      return getChildren() != null ? getChildren().equals(
+          ((CompositeConstraint)o).getChildren()) :
+          ((CompositeConstraint)o).getChildren() == null;
+    }
+
+    @Override
+    public int hashCode() {
+      return getChildren() != null ? getChildren().hashCode() : 0;
+    }
   }
 
   /**
@@ -563,5 +690,34 @@ public DelayUnit getDelayUnit() {
     public <T> T accept(Visitor<T> visitor) {
       return visitor.visit(this);
     }
+
+    @Override
+    public boolean equals(Object o) {
+      if (this == o) {
+        return true;
+      }
+      if (o == null || getClass() != o.getClass()) {
+        return false;
+      }
+
+      TimedPlacementConstraint that = (TimedPlacementConstraint) o;
+
+      if (schedulingDelay != that.schedulingDelay) {
+        return false;
+      }
+      if (constraint != null ? !constraint.equals(that.constraint) :
+          that.constraint != null) {
+        return false;
+      }
+      return delayUnit == that.delayUnit;
+    }
+
+    @Override
+    public int hashCode() {
+      int result = constraint != null ? constraint.hashCode() : 0;
+      result = 31 * result + (int) (schedulingDelay ^ (schedulingDelay >>> 32));
+      result = 31 * result + (delayUnit != null ? delayUnit.hashCode() : 0);
+      return result;
+    }
   }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_protos.proto

@@ -649,6 +649,12 @@ message CompositePlacementConstraintProto {
   repeated TimedPlacementConstraintProto timedChildConstraints = 3;
 }
 
+// This associates a set of allocation tags to a Placement Constraint.
+message PlacementConstraintMapEntryProto {
+  repeated string allocation_tags = 1;
+  optional PlacementConstraintProto placement_constraint = 2;
+}
+
 ////////////////////////////////////////////////////////////////////////
 ////// From reservation_protocol /////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/proto/yarn_service_protos.proto

@@ -38,6 +38,7 @@ message RegisterApplicationMasterRequestProto {
   optional string host = 1;
   optional int32 rpc_port = 2;
   optional string tracking_url = 3;
+  repeated PlacementConstraintMapEntryProto placement_constraints = 4;
 }
 
 message RegisterApplicationMasterResponseProto {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/protocolrecords/impl/pb/RegisterApplicationMasterRequestPBImpl.java

@@ -21,24 +21,41 @@
 
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
+import org.apache.hadoop.yarn.api.pb.PlacementConstraintFromProtoConverter;
+import org.apache.hadoop.yarn.api.pb.PlacementConstraintToProtoConverter;
 import org.apache.hadoop.yarn.api.protocolrecords.RegisterApplicationMasterRequest;
+
+import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
+import org.apache.hadoop.yarn.proto.YarnProtos;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterRequestProto;
 import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterRequestProtoOrBuilder;
 
 import com.google.protobuf.TextFormat;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
 @Private
 @Unstable
-public class RegisterApplicationMasterRequestPBImpl extends RegisterApplicationMasterRequest {
+public class RegisterApplicationMasterRequestPBImpl
-  RegisterApplicationMasterRequestProto proto = RegisterApplicationMasterRequestProto.getDefaultInstance();
+    extends RegisterApplicationMasterRequest {
-  RegisterApplicationMasterRequestProto.Builder builder = null;
+  private RegisterApplicationMasterRequestProto proto =
+      RegisterApplicationMasterRequestProto.getDefaultInstance();
+  private RegisterApplicationMasterRequestProto.Builder builder = null;
+  private Map<Set<String>, PlacementConstraint> placementConstraints = null;
   boolean viaProto = false;
   
   public RegisterApplicationMasterRequestPBImpl() {
     builder = RegisterApplicationMasterRequestProto.newBuilder();
   }
 
-  public RegisterApplicationMasterRequestPBImpl(RegisterApplicationMasterRequestProto proto) {
+  public RegisterApplicationMasterRequestPBImpl(
+      RegisterApplicationMasterRequestProto proto) {
     this.proto = proto;
     viaProto = true;
   }
@@ -71,6 +88,30 @@ public String toString() {
   }
 
   private void mergeLocalToBuilder() {
+    if (this.placementConstraints != null) {
+      addPlacementConstraintMap();
+    }
+  }
+
+  private void addPlacementConstraintMap() {
+    maybeInitBuilder();
+    builder.clearPlacementConstraints();
+    if (this.placementConstraints == null) {
+      return;
+    }
+    List<YarnProtos.PlacementConstraintMapEntryProto> protoList =
+        new ArrayList<>();
+    for (Map.Entry<Set<String>, PlacementConstraint> entry :
+        this.placementConstraints.entrySet()) {
+      protoList.add(
+          YarnProtos.PlacementConstraintMapEntryProto.newBuilder()
+              .addAllAllocationTags(entry.getKey())
+              .setPlacementConstraint(
+                  new PlacementConstraintToProtoConverter(
+                      entry.getValue()).convert())
+              .build());
+    }
+    builder.addAllPlacementConstraints(protoList);
   }
 
   private void mergeLocalToProto() {
@@ -90,7 +131,8 @@ private void maybeInitBuilder() {
 
   @Override
   public String getHost() {
-    RegisterApplicationMasterRequestProtoOrBuilder p = viaProto ? proto : builder;
+    RegisterApplicationMasterRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
     return p.getHost();
   }
 
@@ -106,7 +148,8 @@ public void setHost(String host) {
 
   @Override
   public int getRpcPort() {
-    RegisterApplicationMasterRequestProtoOrBuilder p = viaProto ? proto : builder;
+    RegisterApplicationMasterRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
     return p.getRpcPort();
   }
 
@@ -118,7 +161,8 @@ public void setRpcPort(int port) {
 
   @Override
   public String getTrackingUrl() {
-    RegisterApplicationMasterRequestProtoOrBuilder p = viaProto ? proto : builder;
+    RegisterApplicationMasterRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
     return p.getTrackingUrl();
   }
 
@@ -131,4 +175,50 @@ public void setTrackingUrl(String url) {
     }
     builder.setTrackingUrl(url);
   }
+
+  private void initPlacementConstraintMap() {
+    if (this.placementConstraints != null) {
+      return;
+    }
+    RegisterApplicationMasterRequestProtoOrBuilder p =
+        viaProto ? proto : builder;
+    List<YarnProtos.PlacementConstraintMapEntryProto> pcmList =
+        p.getPlacementConstraintsList();
+    this.placementConstraints = new HashMap<>();
+    for (YarnProtos.PlacementConstraintMapEntryProto e : pcmList) {
+      this.placementConstraints.put(
+          new HashSet<>(e.getAllocationTagsList()),
+          new PlacementConstraintFromProtoConverter(
+              e.getPlacementConstraint()).convert());
+    }
+  }
+
+  @Override
+  public Map<Set<String>, PlacementConstraint> getPlacementConstraints() {
+    initPlacementConstraintMap();
+    return this.placementConstraints;
+  }
+
+  @Override
+  public void setPlacementConstraints(
+      Map<Set<String>, PlacementConstraint> constraints) {
+    maybeInitBuilder();
+    if (constraints == null) {
+      builder.clearPlacementConstraints();
+    } else {
+      removeEmptyKeys(constraints);
+    }
+    this.placementConstraints = constraints;
+  }
+
+  private void removeEmptyKeys(
+      Map<Set<String>, PlacementConstraint> constraintMap) {
+    Iterator<Set<String>> iter = constraintMap.keySet().iterator();
+    while (iter.hasNext()) {
+      Set<String> aTags = iter.next();
+      if (aTags.size() == 0) {
+        iter.remove();
+      }
+    }
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/api/BasePBImplRecordsTest.java

@@ -22,12 +22,19 @@
 import com.google.common.collect.Sets;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.yarn.api.resource.PlacementConstraint;
+import org.apache.hadoop.yarn.api.resource.PlacementConstraints;
 import org.junit.Assert;
 
 import java.lang.reflect.*;
 import java.nio.ByteBuffer;
 import java.util.*;
 
+import static org.apache.hadoop.yarn.api.resource.PlacementConstraints.NODE;
+import static org.apache.hadoop.yarn.api.resource.PlacementConstraints
+    .PlacementTargets.allocationTag;
+import static org.apache.hadoop.yarn.api.resource.PlacementConstraints.targetIn;
+
 /**
  * Generic helper class to validate protocol records.
  */
@@ -85,6 +92,10 @@ private static Object genTypeValue(Type type) {
         ByteBuffer buff = ByteBuffer.allocate(4);
         rand.nextBytes(buff.array());
         return buff;
+      } else if (type.equals(PlacementConstraint.class)) {
+        PlacementConstraint.AbstractConstraint sConstraintExpr =
+            targetIn(NODE, allocationTag("foo"));
+        ret = PlacementConstraints.build(sConstraintExpr);
       }
     } else if (type instanceof ParameterizedType) {
       ParameterizedType pt = (ParameterizedType)type;