flag to enable public IP in EC2-VPC autoscaling

indexing-service/src/main/java/io/druid/indexing/overlord/autoscaling/ec2/EC2AutoScaler.java

@@ -22,6 +22,7 @@ import com.amazonaws.services.ec2.model.DescribeInstancesRequest;
 import com.amazonaws.services.ec2.model.DescribeInstancesResult;
 import com.amazonaws.services.ec2.model.Filter;
 import com.amazonaws.services.ec2.model.Instance;
+import com.amazonaws.services.ec2.model.InstanceNetworkInterfaceSpecification;
 import com.amazonaws.services.ec2.model.Placement;
 import com.amazonaws.services.ec2.model.Reservation;
 import com.amazonaws.services.ec2.model.RunInstancesRequest;
@@ -123,6 +124,13 @@ public class EC2AutoScaler implements AutoScaler<EC2EnvironmentConfig>
                   ? null
                   : workerConfig.getIamProfile().toIamInstanceProfileSpecification()
               )
+              .withNetworkInterfaces(
+                  workerConfig.getAssociatePublicIpAddress() == null
+                  ? null
+                  : new InstanceNetworkInterfaceSpecification().withAssociatePublicIpAddress(
+                      workerConfig.getAssociatePublicIpAddress()
+                  )
+              )
               .withUserData(userDataBase64)
       );
 

indexing-service/src/main/java/io/druid/indexing/overlord/autoscaling/ec2/EC2NodeData.java

@@ -34,6 +34,7 @@ public class EC2NodeData
   private final String keyName;
   private final String subnetId;
   private final EC2IamProfileData iamProfile;
+  private final Boolean associatePublicIpAddress;
 
   @JsonCreator
   public EC2NodeData(
@@ -44,7 +45,8 @@ public class EC2NodeData
       @JsonProperty("securityGroupIds") List<String> securityGroupIds,
       @JsonProperty("keyName") String keyName,
       @JsonProperty("subnetId") String subnetId,
-      @JsonProperty("iamProfile") EC2IamProfileData iamProfile
+      @JsonProperty("iamProfile") EC2IamProfileData iamProfile,
+      @JsonProperty("associatePublicIpAddress") Boolean associatePublicIpAddress
   )
   {
     this.amiId = amiId;
@@ -55,6 +57,7 @@ public class EC2NodeData
     this.keyName = keyName;
     this.subnetId = subnetId;
     this.iamProfile = iamProfile;
+    this.associatePublicIpAddress = associatePublicIpAddress;
   }
 
   @JsonProperty
@@ -105,6 +108,12 @@ public class EC2NodeData
     return iamProfile;
   }
 
+  @JsonProperty
+  public Boolean getAssociatePublicIpAddress()
+  {
+    return associatePublicIpAddress;
+  }
+
   @Override
   public String toString()
   {

indexing-service/src/test/java/io/druid/indexing/overlord/autoscaling/EC2AutoScalerTest.java

@@ -92,7 +92,7 @@ public class EC2AutoScalerTest
         1,
         new EC2EnvironmentConfig(
             "us-east-1a",
-            new EC2NodeData(AMI_ID, INSTANCE_ID, 1, 1, Lists.<String>newArrayList(), "foo", "mySubnet", null),
+            new EC2NodeData(AMI_ID, INSTANCE_ID, 1, 1, Lists.<String>newArrayList(), "foo", "mySubnet", null, null),
             new GalaxyEC2UserData(new DefaultObjectMapper(), "env", "version", "type")
         ),
         amazonEC2Client,

indexing-service/src/test/java/io/druid/indexing/overlord/autoscaling/ec2/EC2NodeDataTest.java

@@ -0,0 +1,64 @@
+/*
+ * Licensed to Metamarkets Group Inc. (Metamarkets) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  Metamarkets licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.druid.indexing.overlord.autoscaling.ec2;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.druid.jackson.DefaultObjectMapper;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+public class EC2NodeDataTest
+{
+  @Test
+  public void testSerde() throws Exception
+  {
+    final ObjectMapper objectMapper = new DefaultObjectMapper();
+    final String json = "{ \"amiId\" : \"abc123\", \"instanceType\" : \"k2.9xsmall\", \"minInstances\" : 1, \"maxInstances\" : 2,"
+                        + " \"securityGroupIds\" : [\"sg-abc321\"], \"keyName\" : \"opensesame\", \"subnetId\" : \"darknet2\","
+                        + " \"associatePublicIpAddress\" : true, \"iamProfile\" : { \"name\" : \"john\", \"arn\" : \"xxx:abc:1234/xyz\" } }";
+    EC2NodeData nodeData = objectMapper.readValue(json, EC2NodeData.class);
+
+    Assert.assertEquals("abc123", nodeData.getAmiId());
+    Assert.assertEquals("k2.9xsmall", nodeData.getInstanceType());
+    Assert.assertEquals(2, nodeData.getMaxInstances());
+    Assert.assertEquals(1, nodeData.getMinInstances());
+    Assert.assertEquals(Arrays.asList("sg-abc321"), nodeData.getSecurityGroupIds());
+    Assert.assertEquals("opensesame", nodeData.getKeyName());
+    Assert.assertEquals("darknet2", nodeData.getSubnetId());
+    Assert.assertEquals("john", nodeData.getIamProfile().getName());
+    Assert.assertEquals("xxx:abc:1234/xyz", nodeData.getIamProfile().getArn());
+    Assert.assertEquals(true, nodeData.getAssociatePublicIpAddress());
+
+    EC2NodeData nodeData2 = objectMapper.readValue("{}", EC2NodeData.class);
+    // default is not always false, null has to be a valid value
+    Assert.assertNull(nodeData2.getAssociatePublicIpAddress());
+
+    // round trip
+    Assert.assertEquals(
+        nodeData,
+        objectMapper.readValue(
+            objectMapper.writeValueAsBytes(nodeData),
+            EC2NodeData.class
+        )
+    );
+  }
+}

indexing-service/src/test/java/io/druid/indexing/overlord/setup/WorkerBehaviorConfigTest.java

@@ -56,6 +56,7 @@ public class WorkerBehaviorConfigTest
                     Arrays.asList("securityGroupIds"),
                     "keyNames",
                     "subnetId",
+                    null,
                     null
                 ),
                 new StringEC2UserData(