/opt/chainguard/jupyterhub-k8s-singleuser-sample/bin/jupyter-labhub

[I 2026-11-09 14:52:14.962 SingleUserLabApp mixins:558] Starting jupyterhub single-user server version 5.5.5
[I 2026-11-09 14:52:14.962 SingleUserLabApp mixins:572] Extending jupyterlab.labhubapp.SingleUserLabApp from jupyterlab 4.6.4
[I 2026-11-09 14:52:14.963 SingleUserLabApp mixins:572] Extending jupyter_server.serverapp.ServerApp from jupyter_server 2.21.1
Single-user server for JupyterHub. Extends the Jupyter Notebook server.

Meant to be invoked by JupyterHub Spawners, not directly.

Options
=======
The options below are convenience aliases to configurable class-options,
as listed in the "Equivalent to" description-line of the aliases.
To see all configurable class-options for some <cmd>, use:
    <cmd> --help-all

--debug
    Set debug level for the extension and underlying server applications.
    Equivalent to: [--ServerApp.log_level=DEBUG --ExtensionApp.log_level=DEBUG]
--show-config
    Show the application's configuration (human-readable format)
    Equivalent to: [--Application.show_config=True]
--show-config-json
    Show the application's configuration (json format)
    Equivalent to: [--Application.show_config_json=True]
--generate-config
    generate default config file
    Equivalent to: [--JupyterApp.generate_config=True]
-y
    Answer yes to any questions instead of prompting.
    Equivalent to: [--JupyterApp.answer_yes=True]
--allow-root
    Allow the server to be run from root user.
    Equivalent to: [--ServerApp.allow_root=True]
--no-browser
    Prevent the opening of the default url in the browser.
    Equivalent to: [--ServerApp.open_browser=False --ExtensionApp.open_browser=False]
--autoreload
    Autoreload the webapp
        Enable reloading of the tornado webapp and all imported Python packages
        when any changes are made to any Python src files in server or
        extensions.
    Equivalent to: [--ServerApp.autoreload=True]
--script
    DEPRECATED, IGNORED
    Equivalent to: [--FileContentsManager.save_script=True]
--no-script
    DEPRECATED, IGNORED
    Equivalent to: [--FileContentsManager.save_script=False]
--core-mode
    Start the app in core mode.
    Equivalent to: [--LabApp.core_mode=True]
--dev-mode
    Start the app in dev mode for running from source.
    Equivalent to: [--LabApp.dev_mode=True]
--skip-dev-build
    Skip the initial install and JS build of the app in dev mode.
    Equivalent to: [--LabApp.skip_dev_build=True]
--watch
    Start the app in watch mode.
    Equivalent to: [--LabApp.watch=True]
--splice-source
    Splice source packages into app directory.
    Equivalent to: [--LabApp.splice_source=True]
--expose-app-in-browser
    Expose the global app instance to browser via window.jupyterapp.
    Equivalent to: [--LabApp.expose_app_in_browser=True]
--extensions-in-dev-mode
    Load prebuilt extensions in dev-mode.
    Equivalent to: [--LabApp.extensions_in_dev_mode=True]
--collaborative
    To enable real-time collaboration, you must install the extension `jupyter_collaboration`.
            You can install it using pip for example:

                python -m pip install jupyter_collaboration

            This flag is now deprecated and will be removed in JupyterLab v5.
    Equivalent to: [--LabApp.collaborative=True]
--custom-css
    Load custom CSS in template html files. Default is False
    Equivalent to: [--LabApp.custom_css=True]
--disable-user-config
    Disable user-controlled configuration of the notebook server.
    Equivalent to: [--SingleUserNotebookApp.disable_user_config=True]
--log-level=<Enum>
    Set the log level by value or name.
    Choices: any of [0, 10, 20, 30, 40, 50, 'DEBUG', 'INFO', 'WARN', 'ERROR', 'CRITICAL']
    Default: 30
    Equivalent to: [--Application.log_level]
--config=<Unicode>
    Full path of a config file.
    Default: ''
    Equivalent to: [--JupyterApp.config_file]
--ip=<Unicode>
    The IP address the Jupyter server will listen on.
    Default: 'localhost'
    Equivalent to: [--ServerApp.ip]
--port=<Int>
    The port the server will listen on (env: JUPYTER_PORT).
    Default: 0
    Equivalent to: [--ServerApp.port]
--port-retries=<Int>
    The number of additional ports to try if the specified port is not available
    (env: JUPYTER_PORT_RETRIES).
    Default: 50
    Equivalent to: [--ServerApp.port_retries]
--sock=<Unicode>
    The UNIX socket the Jupyter server will listen on.
    Default: ''
    Equivalent to: [--ServerApp.sock]
--sock-mode=<Unicode>
    The permissions mode for UNIX socket creation (default: 0600).
    Default: '0600'
    Equivalent to: [--ServerApp.sock_mode]
--transport=<CaselessStrEnum>
    Choices: any of ['tcp', 'ipc'] (case-insensitive)
    Default: 'tcp'
    Equivalent to: [--KernelManager.transport]
--keyfile=<Unicode>
    The full path to a private key file for usage with SSL/TLS.
    Default: ''
    Equivalent to: [--ServerApp.keyfile]
--certfile=<Unicode>
    The full path to an SSL/TLS certificate file.
    Default: ''
    Equivalent to: [--ServerApp.certfile]
--client-ca=<Unicode>
    The full path to a certificate authority certificate for SSL/TLS client
    authentication.
    Default: ''
    Equivalent to: [--ServerApp.client_ca]
--notebook-dir=<Unicode>
    The directory to use for notebooks and kernels.
    Default: ''
    Equivalent to: [--ServerApp.root_dir]
--preferred-dir=<Unicode>
    Preferred starting directory to use for notebooks and kernels.
    ServerApp.preferred_dir is deprecated in jupyter-server 2.0. Use
    FileContentsManager.preferred_dir instead
    Default: ''
    Equivalent to: [--ServerApp.preferred_dir]
--browser=<Unicode>
    Specify what command to use to invoke a web browser when starting the
    server. If not specified, the default browser will be determined by the
    `webbrowser` standard library module, which allows setting of the BROWSER
    environment variable to override it.
    Default: ''
    Equivalent to: [--ServerApp.browser]
--pylab=<Unicode>
    DISABLED: use %pylab or %matplotlib in the notebook to enable matplotlib.
    Default: 'disabled'
    Equivalent to: [--ServerApp.pylab]
--gateway-url=<Unicode>
    The url of the Kernel or Enterprise Gateway server where kernel
    specifications are defined and kernel management takes place. If defined,
    this Notebook server acts as a proxy for all kernel management and kernel
    specification retrieval.  (JUPYTER_GATEWAY_URL env var)
    Default: None
    Equivalent to: [--GatewayClient.url]
--user=<CUnicode>
    Default: ''
    Equivalent to: [--SingleUserNotebookApp.user]
--group=<CUnicode>
    Default: ''
    Equivalent to: [--SingleUserNotebookApp.group]
--hub-prefix=<Unicode>
    Default: '/hub/'
    Equivalent to: [--SingleUserNotebookApp.hub_prefix]
--hub-host=<Unicode>
    Default: ''
    Equivalent to: [--SingleUserNotebookApp.hub_host]
--hub-api-url=<Unicode>
    Default: ''
    Equivalent to: [--SingleUserNotebookApp.hub_api_url]
--base-url=<Unicode>
    The base URL for the Jupyter server.

    Leading and trailing slashes can be omitted, and will automatically be
    added.
    Default: '/'
    Equivalent to: [--SingleUserNotebookApp.base_url]

To see all available configurables, use `--help-all`.