08f9b67f60
Mirror the public-link convenience Studio already has for its own UI, for JupyterLab. Off by default; opt in two ways: docker run -e UNSLOTH_JUPYTER_CLOUDFLARE=1 ... unsloth/unsloth docker exec <container> unsloth-jupyter-tunnel --force unsloth-jupyter-tunnel waits for JupyterLab, reuses a cached cloudflared (or fetches the static binary for the arch, no account needed), and starts a quick tunnel to the Jupyter port; the https://<name>.trycloudflare.com URL is printed to docker logs. supervisord runs it as the jupyter-cloudflare program, autostarted only when UNSLOTH_JUPYTER_CLOUDFLARE=1 (studio_launch.sh exports a 0 default so the autostart gate expands, matching the sshd pattern). JupyterLab still enforces its password, so the tunnel is not an open door. Verified: the helper fetches cloudflared and mints a working trycloudflare URL that reaches JupyterLab (HTTP 200) inside a running container.
94 lines
4.2 KiB
Bash
94 lines
4.2 KiB
Bash
#!/usr/bin/env bash
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# Default CMD of the full Unsloth image (Dockerfile.studio).
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#
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# Bootstraps the three services managed by supervisord:
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# studio port 8000 first-boot admin password printed in `docker logs`
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# jupyter port 8888 password from JUPYTER_PASSWORD, or a random one
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# printed in `docker logs` when unset
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# sshd port 22 key-only; enabled when PUBLIC_KEY / SSH_KEY is set
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#
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# Environment:
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# JUPYTER_PORT Jupyter port inside the container (default 8888)
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# JUPYTER_PASSWORD Jupyter login password (unset: generated and printed)
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# PUBLIC_KEY/SSH_KEY OpenSSH public key for root login; sshd stays disabled
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# when neither is set (nothing to authenticate with --
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# password login is never enabled for root)
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set -euo pipefail
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export JUPYTER_PORT="${JUPYTER_PORT:-8888}"
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export UNSLOTH_STUDIO_HOME="${UNSLOTH_STUDIO_HOME:-/opt/unsloth-studio}"
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# Default off so supervisord's %(ENV_UNSLOTH_JUPYTER_CLOUDFLARE)s autostart gate
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# resolves; set to 1 (docker run -e) to expose JupyterLab on a trycloudflare URL.
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export UNSLOTH_JUPYTER_CLOUDFLARE="${UNSLOTH_JUPYTER_CLOUDFLARE:-0}"
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# Make the runtime env visible to SSH sessions, which get a fresh login shell
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# without the `docker run -e` vars. Secrets are excluded on purpose: tokens,
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# API keys and passwords stay in process env only, never on disk where an
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# SSH session (or anything reading /etc/profile.d) could pick them up.
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# shlex.quote() each value: env vars can contain quotes, $, backticks etc,
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# and this file is sourced by every login shell.
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python - > /etc/profile.d/unsloth_env.sh <<'PY' || true
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import os, re, shlex
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keep = re.compile(r"^(HF_|CUDA_|NCCL_|JUPYTER_|UNSLOTH_|WANDB_|TRITON_)|^PATH$")
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secret = re.compile(r"(_TOKEN|_API_KEY|_PASSWORD|_SECRET|_LICENSE)$")
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for key, value in sorted(os.environ.items()):
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if keep.search(key) and not secret.search(key):
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print(f"export {key}={shlex.quote(value)}")
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PY
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# --- Jupyter -----------------------------------------------------------------
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# Hash the password with jupyter's own helper; never store the plaintext.
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# No fixed default password: when JUPYTER_PASSWORD is unset we generate a
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# random one and print it once in the boot banner (docker logs).
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JUPYTER_CONFIG_DIR=/root/.jupyter
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JUPYTER_NOTE="password from JUPYTER_PASSWORD env"
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if [[ -f "${JUPYTER_CONFIG_DIR}/jupyter_lab_config.py" ]]; then
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JUPYTER_NOTE="existing jupyter config reused"
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else
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if [[ -z "${JUPYTER_PASSWORD:-}" ]]; then
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JUPYTER_PASSWORD="$(python -c 'import secrets; print(secrets.token_urlsafe(12))')"
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JUPYTER_NOTE="generated password: ${JUPYTER_PASSWORD}"
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fi
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export JUPYTER_PASSWORD
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mkdir -p "${JUPYTER_CONFIG_DIR}"
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HASH=$(python - <<PY
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from jupyter_server.auth import passwd
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import os
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print(passwd(os.environ["JUPYTER_PASSWORD"]))
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PY
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)
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cat > "${JUPYTER_CONFIG_DIR}/jupyter_lab_config.py" <<EOF
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c.ServerApp.ip = "0.0.0.0"
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c.ServerApp.open_browser = False
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c.ServerApp.root_dir = "/workspace"
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c.PasswordIdentityProvider.hashed_password = "${HASH}"
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EOF
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fi
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# --- sshd (opt-in) -----------------------------------------------------------
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# Enabled only when a public key is provided; root password login is never
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# allowed. Cloud GPU platforms (e.g. runpod-style hosts) inject PUBLIC_KEY.
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PUBLIC_SSH_KEY="${SSH_KEY:-${PUBLIC_KEY:-}}"
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export UNSLOTH_ENABLE_SSHD=false
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if [[ -n "${PUBLIC_SSH_KEY}" ]] && command -v sshd >/dev/null 2>&1; then
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mkdir -p /root/.ssh && chmod 700 /root/.ssh
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echo "${PUBLIC_SSH_KEY}" > /root/.ssh/authorized_keys
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chmod 600 /root/.ssh/authorized_keys
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ssh-keygen -A
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mkdir -p /run/sshd
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export UNSLOTH_ENABLE_SSHD=true
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fi
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mkdir -p /workspace
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echo "Unsloth Studio -> http://localhost:8000 (first-boot password below)"
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echo "JupyterLab -> http://localhost:${JUPYTER_PORT} (${JUPYTER_NOTE})"
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if [[ "${UNSLOTH_JUPYTER_CLOUDFLARE}" == "1" ]]; then
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echo "JupyterLab tunnel-> enabled; public trycloudflare URL appears below once it is up"
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else
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echo "JupyterLab tunnel-> off (set UNSLOTH_JUPYTER_CLOUDFLARE=1 for a public link)"
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fi
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if [[ "${UNSLOTH_ENABLE_SSHD}" == "true" ]]; then
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echo "sshd -> port 22 (key-only)"
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fi
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exec supervisord -c /etc/supervisor/supervisord.conf
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