fabro/docs/public/human-tools/ssh-access.mdx
fabro-sh-0530[bot] 7f84ac5e3f
Replace run-scoped sandbox config with named environments (#360)
## Summary

Replaces the `[run.sandbox]` configuration surface with a named,
provider-explicit environment catalog. Runs now select an environment by
slug (`[run.environment] id = "..."`) rather than configuring a sandbox
inline. Fabro resolves the catalog through normal settings precedence,
applies sparse run-level overrides, and creates a concrete sandbox from
the resolved environment.

This is a clean break — no `[run.sandbox]` compatibility layer.

### Plan Summary

- **New config shape:** Top-level `[environments.<slug>]` catalog valid
in `settings.toml`, `.fabro/project.toml`, and `workflow.toml`. Runs
reference a slug via `[run.environment] id = "..."` with optional sparse
overrides under `[run.environment.*]`.
- **Unified environment fields:** `provider`, `image` (ref +
dockerfile), `resources` (cpu/memory/disk), `network` (mode + allow
CIDRs), `lifecycle` (preserve/stop_on_terminal/auto_stop), `labels`,
`volumes`, `env` — replacing the previous split between `[run.sandbox]`,
`[run.sandbox.docker]`, `[run.sandbox.daytona]`, and
`[run.sandbox.daytona.snapshot]`.
- **OpenAPI schema update:** `RunSandboxSettings`, `DockerSettings`,
`DaytonaSettings`, and `DaytonaNetworkLayer` replaced with
`RunEnvironmentSettings`, `EnvironmentSettings`, `EnvironmentProvider`,
`EnvironmentImageSettings`, `EnvironmentResourcesSettings`,
`EnvironmentNetworkSettings`, `EnvironmentLifecycleSettings`, and
`EnvironmentVolumeSettings`.
- **CLI flag rename:** `--sandbox <provider>` → `--environment <slug>`
on `run`, `create`, `preflight`, and `server start/restart`.
- **Provider capability model:** Hard errors for security properties a
provider cannot enforce (local with blocked/CIDR networking; docker with
CIDR allow-lists). Warnings for unsupported resource limits, volumes,
labels, auto-stop, and Docker Dockerfiles.
- **Docs and internal code updated** throughout: `.fabro/project.toml`,
workflow configs, all public docs, CLI args, manifest builders, and the
runner's GitHub credentials check.

### Provider mapping

| Environment field | Local | Docker | Daytona |
|---|---|---|---|
| `image.ref` | Ignored | Docker image | Snapshot name |
| `image.dockerfile` | Ignored | Warning; ignored | Snapshot Dockerfile
(requires `image.ref`) |
| `resources.cpu/memory/disk` | Warning; ignored | cpu_quota / memory
limit / warning | Snapshot sizing |
| `network.mode = block` | **Error** | `network_mode = none` | Daytona
block |
| `network.mode = cidr_allow_list` | **Error** | **Error** | Daytona
CIDR allow-list |
| `labels` | Warning; ignored | Warning; ignored | Daytona labels |
| `volumes` | Warning; ignored | Warning; ignored | Daytona volume
mounts |
| `lifecycle.auto_stop` | Warning; ignored | Warning; ignored | Daytona
auto-stop interval |
| `env` | Process env overlay | Container env | Sandbox env |


### Fabro Details

<details>
<summary>Ran 11 stages in 217m 39s for $129.86</summary>

| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 1s | – | 0 |
| preflight_compile | 4m 7s | – | 0 |
| preflight_lint | 4m 9s | – | 0 |
| fix_lints | 3m 46s | $1.06 | 0 |
| implement | 76m 6s | $57.39 | 0 |
| simplify_opus | 71m 50s | $38.17 | 0 |
| simplify_gpt | 8m 27s | $2.24 | 0 |
| verify | 6m 10s | – | 0 |
| fixup | 42m 1s | $31.00 | 0 |
| fmt | 3s | – | 0 |
| **Total** | **217m 39s** | **$129.86** | **0** |

</details>

<details>
<summary>Ran <code>ImplementPlan.fabro</code> (12 nodes and 15
edges)</summary>

```dot
digraph ImplementPlan {
    graph [
        goal="Implement and simplify",
        model_stylesheet="
            * { model: claude-opus-4-7; }
        "
    ]
    rankdir=LR

    start [shape=Mdiamond, label="Start"]
    exit  [shape=Msquare, label="Exit"]

    toolchain         [label="Toolchain", shape=parallelogram, script="command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1", max_retries=0]
    preflight_compile [label="Preflight Compile", shape=parallelogram, script="cargo check -q --workspace 2>&1", max_retries=0]
    preflight_lint    [label="Preflight Lint", shape=parallelogram, script="cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1", max_retries=0]
    fix_lints         [label="Fix Lints", prompt="The preflight lint step failed. Read the build output from context and fix all clippy lint warnings.", max_visits=3]
    implement         [label="Implement", prompt="Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan. Use red/green TDD.", model="gpt-55", reasoning_effort="xhigh"]
    simplify_opus     [label="Simplify (Opus)", prompt="@prompts/simplify.md"]
    simplify_gpt      [label="Simplify (GPT-55)", prompt="@prompts/simplify.md", model="gpt-55"]
    verify            [label="Verify", shape=parallelogram, script="cargo +nightly-2026-04-14 clippy -q --workspace --all-targets -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 2>&1 && cargo dev docs refresh 2>&1 && cargo dev docs check 2>&1", goal_gate=true, retry_target="fixup"]
    fixup             [label="Fixup", prompt="The verify step failed. Read the build output from context and fix all clippy lint warnings, test failures, and generated docs errors.", max_visits=3]
    fmt               [label="Format", shape=parallelogram, script="cargo +nightly-2026-04-14 fmt --all 2>&1", max_retries=0]

    start -> toolchain
    toolchain -> preflight_compile [condition="outcome=succeeded"]
    toolchain -> exit
    preflight_compile -> preflight_lint [condition="outcome=succeeded"]
    preflight_compile -> exit
    preflight_lint -> implement [condition="outcome=succeeded"]
    preflight_lint -> fix_lints
    fix_lints -> preflight_lint
    implement -> simplify_opus -> simplify_gpt -> verify
    verify -> fmt   [condition="outcome=succeeded"]
    verify -> fixup
    fixup -> verify
    fmt -> exit
}

```

</details>

⚒️ Generated with [Fabro](https://fabro.sh)

---------

Co-authored-by: Fabro <noreply@fabro.sh>
Co-authored-by: Bryan Helmkamp <bryan@brynary.com>
Co-authored-by: Bryan Helmkamp <bhelmkamp@users.noreply.github.com>
2026-05-23 13:03:21 -04:00

67 lines
2.4 KiB
Text

---
title: "SSH Access"
description: "Connect to sandbox environments via SSH for direct inspection and debugging"
---
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.
<Note>
SSH access is only available with the Daytona sandbox provider. Local, Docker, and exe.dev sandboxes do not support SSH access.
</Note>
## Connecting to a run's sandbox
Use `fabro sandbox ssh` to connect to the Daytona sandbox from any completed or in-progress run:
```bash
fabro sandbox ssh <run-id>
```
Fabro creates temporary SSH credentials and connects directly. Use `--print` to print the SSH command instead of connecting, or `--ttl` to set the credential expiry:
```bash
fabro sandbox ssh <run-id> --print
fabro sandbox ssh <run-id> --ttl 120
```
## Keeping the sandbox alive
By default, Daytona sandboxes are destroyed when the workflow finishes. To keep the sandbox running after the workflow completes — so you can continue debugging — pass `--preserve-sandbox`:
```bash
fabro run workflow.fabro --environment cloud --preserve-sandbox
```
Without `--preserve-sandbox`, the SSH session is terminated when the run ends and the sandbox is cleaned up.
You can also set `lifecycle.auto_stop` in your environment to control how long an idle sandbox stays alive:
```toml title="run.toml"
[run.environment]
id = "cloud"
[environments.cloud]
provider = "daytona"
[environments.cloud.lifecycle]
preserve = true
auto_stop = "60m"
```
## What you can do over SSH
Once connected, you have a full shell inside the sandbox VM:
- **Inspect the working directory** — Agent file changes are at `/home/daytona/workspace`
- **Run commands** — Execute tests, check logs, inspect process state
- **Edit files** — Make manual fixes while the workflow is paused at a human gate
- **Debug failures** — Reproduce and diagnose issues in the exact environment where they occurred
## Credential lifetime
SSH credentials are temporary and expire after **60 minutes** by default. With `fabro sandbox ssh`, you can set a custom TTL with `--ttl <MINUTES>`. If your session expires, run `fabro sandbox ssh` again to get fresh credentials.
## Limitations
- SSH access is **Daytona-only**.
- SSH access is currently available only from the **CLI**. The API server and web UI do not yet expose an SSH endpoint.