For more information see Control Network Traffic with Security Groups p 258 For a

For more information see control network traffic with

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For more information, see Control Network Traffic with Security Groups (p. 258) . For a complete listing of NACLs of your cluster, choose Security groups for Master and Security groups for Core & Task on the Amazon EMR console Cluster Details page. The following image shows how an EMR cluster is configured within a private subnet. The only communication outside the subnet is to Amazon EMR. The following image shows a sample configuration for an EMR cluster within a private subnet connected to a NAT instance that is residing in a public subnet. 114
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Amazon EMR Management Guide Configure Networking Shared Subnets VPC sharing allows customers to share subnets with other AWS accounts within the same AWS Organization. You can launch Amazon EMR clusters into both public shared and private shared subnets, with the following caveats. The subnet owner must share a subnet with you before you can launch an Amazon EMR cluster into it. However, shared subnets can later be unshared. For more information, see Working with Shared VPCs . When a cluster is launched into a shared subnet and that shared subnet is then unshared, you can observe specific behaviors based on the state of the Amazon EMR cluster when the subnet is unshared. Subnet is unshared before the cluster is successfully launched - If the owner stops sharing the Amazon VPC or subnet while the participant is launching a cluster, the cluster could fail to start or be partially initialized without provisioning all requested instances. Subnet is unshared after the cluster is successfully launched - When the owner stops sharing a subnet or Amazon VPC with the participant, the participant's clusters will not be able to resize to add new instances or to replace unhealthy instances. When you launch an Amazon EMR cluster, multiple security groups are created. In a shared subnet, the subnet participant controls these security groups. The subnet owner can see these security groups but cannot perform any actions on them. If the subnet owner wants to remove or modify the security group, the participant that created the security group must take the action. 115
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Amazon EMR Management Guide Configure Networking Set up a VPC to Host Clusters Before you can launch clusters in a VPC, you must create a VPC, and a subnet. For public subnets, you must create an internet gateway and attach it to the subnet. The following instructions describe how to create a VPC capable of hosting Amazon EMR clusters. To create a subnet to run Amazon EMR clusters 1. Open the Amazon VPC console at . 2. In the navigation bar, select the region in which to run your cluster. 3. Choose Start VPC Wizard . 4. Choose the VPC configuration by selecting one of the following options: VPC with a Single Public Subnet —Select this option if the data used in the cluster is available on the internet (for example, in Amazon S3 or Amazon RDS).
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  • Spring '12
  • LauraParker
  • Amazon Web Services, Amazon Elastic Compute Cloud

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