docs(framework:skip) Add docs for distributed Docker Compose guide

doc/source/docker/index.rst

@@ -45,3 +45,4 @@ Run Flower using Docker Compose
 
    tutorial-quickstart-docker-compose
    run-quickstart-examples-docker-compose
+   tutorial-deploy-on-multiple-machines

doc/source/docker/tutorial-deploy-on-multiple-machines.rst

@@ -0,0 +1,191 @@
+########################################################
+ Deploy Flower on Multiple Machines with Docker Compose
+########################################################
+
+This guide will help you set up a Flower project on multiple machines
+using Docker Compose.
+
+You will learn how to run the Flower client and server components on two
+separate machines, with Flower configured to use TLS encryption and
+persist SuperLink state across restarts. A server consists of a
+SuperLink and ``SuperExec``. For more details about the Flower
+architecture, refer to the :doc:`../explanation-flower-architecture`
+explainer page.
+
+This guide assumes you have completed the
+:doc:`tutorial-quickstart-docker-compose` tutorial. It is highly
+recommended that you follow and understand the contents of that tutorial
+before proceeding with this guide.
+
+***************
+ Prerequisites
+***************
+
+Before you begin, make sure you have the following prerequisites:
+
+-  The ``flwr`` CLI is :doc:`installed <../how-to-install-flower>`
+   locally.
+-  The Docker daemon is running on your local machine and the remote
+   machine.
+-  Docker Compose V2 is installed on both your local machine and the
+   remote machine.
+-  You can connect to the remote machine from your local machine.
+-  Ports ``9091`` and ``9093`` are accessible on the remote machine.
+
+.. note::
+
+   The guide uses the |quickstart_sklearn_tabular|_ example as an
+   example project.
+
+   If your project has a different name or location, please remember to
+   adjust the commands/paths accordingly.
+
+****************
+ Step 1: Set Up
+****************
+
+#. Clone the Flower repository and change to the ``distributed``
+   directory:
+
+   .. code:: bash
+
+      $ git clone --depth=1 https://github.com/adap/flower.git
+      $ cd flower/src/docker/distributed
+
+#. Get the IP address from the remote machine and save it for later.
+
+#. Use the ``certs.yml`` Compose file to generate your own self-signed
+   certificates. If you have certificates, you can continue with Step 2.
+
+   .. important::
+
+      These certificates should be used only for development purposes.
+
+      For production environments, you may have to use dedicated
+      services to obtain your certificates.
+
+   First, set the environment variables ``SUPERLINK_IP`` and
+   ``SUPEREXEC_IP`` with the IP address from the remote machine. For
+   example, if the IP is ``192.168.2.33``, execute:
+
+   .. code:: bash
+
+      $ export SUPERLINK_IP=192.168.2.33
+      $ export SUPEREXEC_IP=192.168.2.33
+
+   Next, generate the self-signed certificates:
+
+   .. code:: bash
+
+      $ docker compose -f certs.yml -f ../complete/certs.yml up --build
+
+***************************************
+ Step 2: Copy the Server Compose Files
+***************************************
+
+Use the method that works best for you to copy the ``server`` directory,
+the certificates, and your Flower project to the remote machine.
+
+For example, you can use ``scp`` to copy the directories:
+
+.. code:: bash
+
+   $ scp -r ./server \
+          ./superexec-certificates \
+          ./superlink-certificates \
+          ../../../examples/quickstart-sklearn-tabular remote:~/distributed
+
+********************************************
+ Step 3: Start the Flower Server Components
+********************************************
+
+Log into the remote machine using ``ssh`` and run the following command
+to start the SuperLink and SuperExec services:
+
+.. code:: bash
+
+   $ ssh <your-remote-machine>
+   # In your remote machine
+   $ cd <path-to-``distributed``-directory>
+   $ export PROJECT_DIR=../quickstart-sklearn-tabular
+   $ docker compose -f server/compose.yml up --build -d
+
+.. note::
+
+   The Path of the ``PROJECT_DIR`` should be relative to the location of
+   the ``server`` Docker Compose files.
+
+Go back to your terminal on your local machine.
+
+********************************************
+ Step 4: Start the Flower Client Components
+********************************************
+
+On your local machine, run the following command to start the client
+components:
+
+.. code:: bash
+
+   # In the `docker/distributed` directory
+   $ export PROJECT_DIR=../../../../examples/quickstart-sklearn-tabular
+   $ docker compose -f client/compose.yml up --build -d
+
+.. note::
+
+   The Path of the ``PROJECT_DIR`` should be relative to the location of
+   the ``client`` Docker Compose files.
+
+*********************************
+ Step 5: Run Your Flower Project
+*********************************
+
+Specify the remote SuperExec IP addresses and the path to the root
+certificate in the ``[tool.flwr.federations.remote-superexec]`` table in
+the ``pyproject.toml`` file. Here, we have named our remote federation
+``remote-superexec``:
+
+.. code:: toml
+   :caption: examples/quickstart-sklearn-tabular/pyproject.toml
+
+   [tool.flwr.federations.remote-superexec]
+   address = "192.168.2.33:9093"
+   root-certificates = "../../src/docker/distributed/superexec-certificates/ca.crt"
+
+.. note::
+
+   The Path of the ``root-certificates`` should be relative to the
+   location of the ``pyproject.toml`` file.
+
+To run the project, execute:
+
+.. code:: bash
+
+   $ flwr run ../../../examples/quickstart-sklearn-tabular remote-superexec
+
+That's it! With these steps, you've set up Flower on two separate
+machines and are ready to start using it.
+
+******************
+ Step 6: Clean Up
+******************
+
+Shut down the Flower client components:
+
+.. code:: bash
+
+   # In the `docker/distributed` directory
+   $ docker compose -f client/compose.yml down
+
+Shut down the Flower server components and delete the SuperLink state:
+
+.. code:: bash
+
+   $ ssh <your-remote-machine>
+   $ cd <path-to-``distributed``-directory>
+   $ docker compose -f server/compose.yml down -v
+
+.. |quickstart_sklearn_tabular| replace::
+
+   ``examples/quickstart-sklearn-tabular``
+
+.. _quickstart_sklearn_tabular: https://github.com/adap/flower/tree/main/examples/quickstart-sklearn-tabular