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* arc(01KK7524KNGTPS4090QMF87FJN): implement (success) Arc-Run: 01KK7524KNGTPS4090QMF87FJN Arc-Completed: 2 Arc-Checkpoint: 1ff03c704805dfe8e7c37b37f97bd06dfa0e5dc5 * Fix: restore trailing newlines stripped by previous commit * arc(01KK7524KNGTPS4090QMF87FJN): simplify (success) Arc-Run: 01KK7524KNGTPS4090QMF87FJN Arc-Completed: 3 Arc-Checkpoint: 21771adfd26283a1d1e6b8a123a83a0c4277db48 --------- Co-authored-by: arc <arc@local> Co-authored-by: Arc Assistant <assistant@arc.dev> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
67 lines
2.5 KiB
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67 lines
2.5 KiB
Text
---
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title: "SSH Access"
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description: "Connect to sandbox environments via SSH for direct inspection and debugging"
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---
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When a workflow runs in a [Daytona sandbox](/execution/environments#daytona), you can SSH into the sandbox to inspect files, run commands, and debug issues — all while the workflow is still executing.
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<Note>
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SSH access is only available with the Daytona sandbox provider. Local, Docker, and exe.dev sandboxes do not support SSH access.
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</Note>
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## Enabling SSH access
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Pass the `--ssh` flag to `arc run`:
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```bash
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arc run workflow.dot --sandbox daytona --ssh
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```
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After the sandbox is created, Arc generates temporary SSH credentials (valid for 60 minutes) and prints the connection command:
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```
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Sandbox: daytona (arc-20260307-143022-a3f2)
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ssh daytona@arc-20260307-143022-a3f2.ssh.daytona.io
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```
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Copy and run the `ssh` command in a separate terminal to connect.
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## Keeping the sandbox alive
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By default, Daytona sandboxes are destroyed when the workflow finishes. To keep the sandbox running after the workflow completes — so you can continue debugging — combine `--ssh` with `--preserve-sandbox`:
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```bash
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arc run workflow.dot --sandbox daytona --ssh --preserve-sandbox
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```
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Without `--preserve-sandbox`, the SSH session is terminated when the run ends and the sandbox is cleaned up.
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You can also set `auto_stop_interval` in your run config to control how long an idle sandbox stays alive:
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```toml title="run.toml"
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[sandbox]
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provider = "daytona"
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preserve = true
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[sandbox.daytona]
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auto_stop_interval = 60
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```
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## What you can do over SSH
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Once connected, you have a full shell inside the sandbox VM:
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- **Inspect the working directory** — Agent file changes are at `/home/daytona/workspace`
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- **Run commands** — Execute tests, check logs, inspect process state
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- **Edit files** — Make manual fixes while the workflow is paused at a human gate
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- **Debug failures** — Reproduce and diagnose issues in the exact environment where they occurred
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## Credential lifetime
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SSH credentials are temporary and expire after **60 minutes**. If your session expires, you'll need to start a new run with `--ssh` to get fresh credentials.
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## Limitations
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- SSH access is **Daytona-only**. Passing `--ssh` with other sandbox providers prints a warning and is ignored.
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- SSH access is currently available only from the **CLI**. The API server and web UI do not yet expose an SSH endpoint.
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- Credentials cannot be refreshed — once the 60-minute window expires, a new run is needed.
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