Finding compute node group instances in AWS PCS - AWS PCS

Finding compute node group instances in AWS PCS

Each AWS PCS compute node group can launch EC2 instances with shared configurations. You can use EC2 tags to find instances in a compute node group in the AWS Management Console or with the AWS CLI.

AWS Management Console
To find your compute node group instances

  1. Open the AWS PCS console.

  2. Select the cluster.

  3. Choose Compute node groups.

  4. Find the ID for the login node group you created.

  5. Navigate to the EC2 console and choose Instances.

  6. Search for the instances with the following tag. Replace node-group-id with the ID (not the name) of your compute node group.

    aws:pcs:compute-node-group-id=node-group-id

  7. (Optional) You can change the value of Instance state in the search field to find instances that are being configured or that were recently terminated.

  8. Find the instance ID and IP address for each instance in the list of tagged instances.

AWS CLI

To find your node group instances, use the commands that follow. Before running the commands, make the following replacements:

  • Replace region-code with the AWS Region of your cluster. Example: us-east-1

  • Replace node-group-id with the ID (not the name) of your compute node group.

  • Replace running with other instance states such as pending or terminated to find EC2 instances in other states.

aws ec2 describe-instances \
     --region region-code --filters \
     "Name=tag:aws:pcs:compute-node-group-id,Values=node-group-id" \
     "Name=instance-state-name,Values=running" \
     --query 'Reservations[*].Instances[*].{InstanceID:InstanceId,State:State.Name,PublicIP:PublicIpAddress,PrivateIP:PrivateIpAddress}'

The command returns output similar to the following. The value of PublicIP is null if the instance is in a private subnet.

[
    [
        {
            "InstanceID": "i-0123456789abcdefa",
            "State": "running",
            "PublicIP": "18.189.32.188",
            "PrivateIP": "10.0.0.1"
        }
    ]
]
Note

If you expect describe-instances to return a large number of instances, you must use options for multiple pages. For more information, see DescribeInstances in the Amazon Elastic Compute Cloud API Reference.