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hyperpod-ssm

Remote command execution and file transfer on SageMaker HyperPod cluster nodes via AWS Systems Manager (SSM). This is the primary interface for accessing HyperPod nodes — direct SSH is not available. Use when any skill, workflow, or user request needs to execute commands on cluster nodes, upload files to nodes, read/download files from nodes, run diagnostics, install packages, or perform any operation requiring shell access to HyperPod instances. Other HyperPod skills depend on this skill for all node-level operations.

plugins/sagemaker-ai/skills/hyperpod-ssm/SKILL.md

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Network or broad shell
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Nov 4, 2026

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Nov 5, 2026
License
Apache-2.0

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# HyperPod SSM Access

## Prerequisites

- **`aws` CLI v2**, authenticated for the target account/Region.
- **`session-manager-plugin`** — installed alongside the AWS CLI.
- **`jq`** — the scripts build JSON payloads with it.
- **`unbuffer`** (from the `expect` package) — wraps `aws ssm start-session` with a PTY so the session-manager-plugin flushes stdout instead of racing to close. Without it, calls intermittently return empty output with `Cannot perform start session: EOF` even when the command ran. Install with `sudo yum install expect`, `sudo apt install expect`, or `brew install expect`. `ssm-exec.sh` detects and uses it automatically; falls back with a warning if missing.

## SSM Target Format

Target: `sagemaker-cluster:<CLUSTER_ID>_<GROUP_NAME>-<INSTANCE_ID>`

- `CLUSTER_ID`: Last segment of cluster ARN (NOT the cluster name). Extract via `get-cluster-info.sh`.