Update IMDS settings for Ocean and Elastigroup

1. Follow the Ocean AWS Cluster Create or Elastigroup AWS Create API instructions.
2. Add this configuration within the launchSpecification section:
   

   "compute": {
     "launchSpecification": {
       "instanceMetadataOptions": {
         "httpTokens": "required",
         "httpPutResponseHopLimit": 12,
         "httpEndpoint": "enabled"
       }
     }
   }

    
3. Apply the changes to running instances so they restart with the new IMDS settings:
   • Deploy an updated Elastigroup configuration, or
   • Roll the Ocean cluster

Update IMDS settings for a stateful node

Create a new AMI with IMDSv2 enabled

1. Follow the Stateful Node AWS Create Stateful Node API instructions and add this configuration for the group:
   

   "compute": {
         "launchSpecification": {
           "metadataOptions": {
             "httpTokens": "optional",
             "httpPutResponseHopLimit": "33",
             "instanceMetadataTags": "Enabled"
           }
         }
       },

2. If adding to an existing Stateful node - apply these changes to the currently running instance by utilizing the Recycle action, so the Stateful node is restarted and relaunches with these metadata options enabled.

aws ec2 register-image \
  --name my-image \
  --root-device-name /dev/xvda \
  --block-device-mappings DeviceName=/dev/xvda,Ebs={SnapshotId=snap-0123456789example} \
  --imds-support v2.0

Update an existing AMI to IMDSv2

aws ec2 modify-image-attribute \
  --image-id ami-0123456789example \
  --imds-support v2.0

Use the custom AMI