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Create compute node group for login nodes in AWS PCS - AWS PCS

Create compute node group for login nodes in AWS PCS

A compute node group is virtual collection of compute nodes (EC2 instances) that AWS PCS launches and manages. When you define a compute node group, you specify common traits such as EC2 instance types, minimum and maximum instance count, target VPC subnets, preferred purchase option, and custom launch configuration. AWS PCS efficiently launches, manages, and terminates compute nodes in a compute node group, according to these settings.

In this step, you will launch a static compute node group that provides interactive access to the cluster. You can use SSH or Amazon EC2 Systems Manager (SSM) to log in to it, then run shell commands and manage Slurm jobs.

To create the compute node group

  • Open the AWS PCS console and navigate to Clusters.

  • Select the cluster named get-started

  • Navigate to Compute node groups and choose Create.

  • In the Compute node group setup section, provide the following:

    • Compute node group name – Enter login.

  • Under Computing configuration, enter or select these values:

    • EC2 launch template – Choose the launch template where the name is login-getstarted-lt

    • IAM instance profile – Choose the instance profile named AWSPCS-getstarted-role

    • Subnets – Select the subnet where the name starts with hpc-networking:PublicSubnetA.

    • Instances – Select c6i.xlarge.

    • Scaling configuration – For Min. instance count, enter 1. For Max. instance count, enter 1.

  • Under Additional settings, specify the following:

    • AMI ID – Select an AMI you want to use, that has a name in the following format:

      aws-pcs-sample_ami-al2023-platform-slurm-version
      Note

      Sample AMIs for Slurm 25.05 and previous versions use Amazon Linux 2 (amzn2) instead of Amazon Linux 2023 (al2023).

      For more information about the sample AMIs, see Using sample Amazon Machine Images (AMIs) with AWS PCS.

  • Choose Create compute node group.

The Status field shows Creating while the compute node group is being provisioned. You can proceed to the next step in the tutorial while it is in progress.