Batch Connect - Example Hello World Server

An example Batch Connect app that launches a Hello World server within a batch job.

The purpose of this app is to provide a relatively simple example of a Batch Connect app using a small server script requiring only a minimal Python3 install that can be modified to understand the workings of a Batch Connect application from the compute node to the browser. A simple Jupyter-like authentication scheme is also provided.

This app was adapted from the bc_example_jupyter app from the Ohio Supercomputing Center.

Prerequisites

This Batch Connect app requires the following software be installed on the compute nodes that the batch job is intended to run on (NOT the OnDemand node):

• OpenSSL 1.0.1+ (used to hash the Hello World server password)

• Python 3 (used to run a the simple Hello World server)

Install

These are command line only installation directions.

We start by downloading a zipped package of this code. This allows us to start with a fresh directory that has no git history as we will be building off of this.

# Download the zip from the GitHub page
wget https://github.com/accre/bc_example_hello/archive/master.tar.gz

# Create a catchy directory
mkdir my_hello_app

# Unzip the downloaded file into this directory
tar xzvf master.tar.gz -C my_hello_app --strip-components=1

# Change the working directory to this new directory
cd my_hello_app

From here you will make any modifications to the code that you would like and version your changes in your own repository:

# Version our app by making a new Git repository
git init

#
# Make all your code changes while testing them in the OnDemand Dashboard
#
# ...
#

# Add the files to the Git repository
git add --all

# Commit the staged files to the Git repository
git commit -m "my first commit"

Contributing

1. Fork it ( https://github.com/accre/bc_example_hello/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request