Endpoint Installation

This page describes how to install a funcX compute endpoint for federated learning (FL) clients on their local computing machines.


funcX endpoint is only supported on linux machine.


funcX (now Globus Compute) uses AMQPS to transmit tasks and results between the cloud hosted service and the endpoint operating on the remote device. AMQPS (port 5671) is the TLS form of AMQP (port 5672), so all communication between the endpoint and cloud service are encrypted. The endpoint is responsible for connecting out to the web service using HTTPS to acquire credentials for its rabbitmq queue, which it connects to over AMQPS. The HTTPS requests are sent to https://compute.api.globus.org/ and http://auth.globus.org/ and AMQPS connection is made out to compute.amqps.globus.org.

Conda environment

We highly recommend to create a new conda virtual environment to install all the required packages for setting funcX endpoint.

$ conda create -n funcx python=3.8
$ conda activate funcx

Package Installation

Clone our Github repository containing the source code for APPFL+funcX package. Specifically, this package handles the local training and the communication with the FL orchestration server on behalf of the client. Then install all required packages by running the following commands.

$ git clone https://github.com/APPFL/APPFLx-Client.git appflx && cd appflx
$ pip install -r requirements.txt
$ pip install -e .


We recently moved the client-side code to the main branch of a new repository (APPFL/APPFLx-Client.git), if you are using the old one (Zilinghan/FL-as-a-Service.git), you can run the following commands in your local git directory to change remote repo.

$ git remote rename origin old-origin
$ git remote add origin https://github.com/APPFL/APPFLx-Client.git
$ git fetch origin
$ git checkout origin/main -B main
$ git branch -D funcx
$ git remote remove old-origin

Hint: If you forget the path to your local git directory, you can find it by running the following commands.

$ conda activate funcx
$ pip list | grep appfl

Create Globus Account

If you do not have a globus account yet, please create a Globus account here.


If you can find your organization in Globus, it is highly recommeneded to use your organization account to log in to Globus as that makes it easier for your collaborators to verify your identity. Otherwise, you can register a Globus account using your commonly-used email address.

Setup a funcX Endpoint

Setup a funcX endpoint using the following command. Please replace <ENDPOINT_NAME> with your own name such as anl-aws-gpu-01.


You might be required to login with Globus when configuring the endpoint. Please follow the prompt instructions and finish the authentication steps.

$ funcx-endpoint configure <ENDPOINT_NAME>

Configure the Endpoint

The command above will create a configuration file $HOME/.funcx/<ENDPOINT_NAME>/config.py. You should update this file with appropriate configurations for the computing resource you are using before starting the endpoint. We provide few suggestions on setting this configuration file.

  • If you are using your own linux machine or some virtual machines provided by cloud service provider such as AWS EC2 or Azure virtual machine, you probably do not need change most part of the config.py file. You just need to specify the number of blocks you want to allocate to the endpoint.

  • If you are using any supercomputer as your computing resources which uses some scheduler such as Slurm to allocate resources, you can find some example configurations for various supercomputers here. We also provide two example configurations for allocating CPU/GPU resources on a supercomputer using Slurm scheduler.


  • If you have further questions about setting up funcX endpoints, please join the funcX Slack for help.

  • Now funcX changes name to Globus Compute, so sometimes you may see term Globus Compute instead of funcX in the funcX document, but they actually refer to the same thing.

Start the Endpoint

Before starting the funcX endpoint, you need to first change to a certain directory you want, which will be the root directory for funcX when accessing your file system or writing output files. Please select that root directory carefully. When you are in your desired directory, run the following command by replacing <ENDPOINT_NAME> with your endpoint name to start the funcX endpoint.

$ funcx-endpoint start <ENDPOINT_NAME>


Whenever you start your endpoint, you should start it in the created conda environment.


If you want to change the funcX root directory or change the configuration file, you should first stop the endpoint by running funcx-endpoint stop <ENDPOINT_NAME> in any directory and then start it again by running funcx-endpoint start <ENDPOINT_NAME> in the desired directory.

Get your Endpoint Id

The following command will print the id of your created endpoint.

$ funcx-endpoint list

Run A Simple Test

You can create a python script (e.g. test.py) by copying the following codes to test if you have successfully set up a funcX endpoint. You need to put your own endpoint id into the script, and you should see the printed result computed by your endpoint.

Test script for testing funcX endpoint setup: installation/endpoint_test.py
from funcx import FuncXExecutor

def double(x):
    return x * 2

endpoint_id = '' #YOUR-ENDPOINT-ID
with FuncXExecutor(endpoint_id=endpoint_id) as fxe:
    fut = fxe.submit(double, 7)

Provide Your Endpoint to APPFLx Developer

Dear APPFLx collaborators, currently, we have to ask the funcX developers to manually add your endpoint id to a certain globus group for usage in experiments, and this process cannot be automated now for some safety reasons. Please provide your endpoint id to us via Slack, and we will register the endpoint for you.