CODEWITHSUNDEEP
javaamazon-web-servicesamazon-ec2
Buffalo
Buffalo

Reputation: 4042

EC2 java sdk -> launching an instance with a public ip

I'm trying to launch an instance into a subnet with a default setting of not assigning public IPs.

With the aws CLI, this is done by adding --associate-public-ip-address:

aws ec2 run-instances --image-id ami-xxx --count 1 --instance-type m4.large --key-name "xxx" --subnet-id subnet-xxx --security-group-ids sg-xxx --associate-public-ip-address

How to do the same thing when launching an instance using the Java SDK?

RunInstancesRequest runInstancesRequest = new RunInstancesRequest();

runInstancesRequest.withImageId(kAmiId)
                   .withInstanceType(kInstanceType)
                   .withMinCount(1)
                   .withMaxCount(1)
                   .withKeyName(kKeyName)
                   .withSecurityGroupIds(kSecurityGroups)
                   .withMonitoring(false)
                   .withSubnetId(kSubnet);

Got it working like this:

InstanceNetworkInterfaceSpecification networkSpec = new InstanceNetworkInterfaceSpecification();
networkSpec.setDeviceIndex(0);
networkSpec.setSubnetId(kSubnet);
networkSpec.setGroups(Arrays.asList(kSecurityGroups));
networkSpec.setAssociatePublicIpAddress(true);

runInstancesRequest.withImageId(kAmiId)
                   .withInstanceType(kInstanceType)
                   .withMinCount(1)
                   .withMaxCount(1)
                   .withKeyName(kKeyName)
                   .withMonitoring(false)
                   .withNetworkInterfaces(networkSpec)
                   .withAdditionalInfo("--associate-public-ip-address");

RunInstancesResult result = mClient.runInstances(runInstancesRequest);

Upvotes: 2

Views: 587

Answers (1)

Mark B
Mark B

Reputation: 200562

It looks like you have to set it by providing a InstanceNetworkInterfaceSpecification. Something like this:

List<InstanceNetworkInterfaceSpecification> interfaces = new ArrayList<InstanceNetworkInterfaceSpecification>();
interfaces.add(new InstanceNetworkInterfaceSpecification().withAssociatePublicIpAddress(true));

runInstancesRequest.withNetworkInterfaces(interfaces);

Upvotes: 2

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