EMU: Software Services Development Group emulation project

Project Description

Emu is a simulation software designed to show the architecture and operational mechanics of supercomputers used in Oak Ridge National Laboratory. This application helps beginners to familiarize with job submission, queue systems, and schedulers on HPC environment before actually using it in real HPC systems.

Key Features:

1. Customizable Machine Creation and Configuration

   • Users can create virtual HPC machines by specifying parameters like nodes, CPUs, cores, and GCDs per node.
   • Helps beginners understand HPC and supercomputer architecture concepts.

2. Job Creation and Execution

   • Web Interface in each machine helps users to design and submit small HPC jobs, and understand slurm scripts.
   • Dynamically updates slurm scripts as users input each values in the GUI.

3. Command Line Support

   • The CLI environment supports limited commands for users who haven’t logged in.
   • After logging in via SSH, users gain full CLI support created using websockets, replicating a real HPC environment.

4. Feedback

   • Errors during job submission will provide detailed feedback, helping users understand and correct mistakes.

How to install and setup Frontend and Backend

1. Download local copy of source code from https://github.com/olcf/ssd_emu using git clone [email protected]:olcf/ssd_emu.git

Backend

1. Install ruby with rbenv (Fedora)
   • Install rbenv dependency from Fedora rbenv
   • When installing rbenv from fedora official repository, it won't have 3.2.2 which is why we need to re install rbenv manually.
   • Clone ruby-build by git clone https://github.com/rbenv/ruby-build.git
   • Run following command to install ruby-build

   •   cd ruby-build
       chmod u+x ./install.sh
       ./install.sh
       rbenv install 3.2.2
     

   • Check the version by running rbenv --version
2. Setup postgresql
   • Install postgres following instruction at fedora-postgresql docs.
   • Install postgresql-devel package by sudo dnf install postgresql-devel (bundle installer won't work without this package)
   • Make sure you provide all the privileges to current user.
3. Install ruby dependencies using Bundler
   • cd ssd_emu/rails-server
   • rbenv local 3.2.2
   • bundle install
4. Install and setup docker if you haven't already
   • Install docker following the setup from Docker Docs
   • Create a user by sudo usermod -aG docker $USER
   • newgrp docker
   • Restart docker to apply changes systemctl restart docker
5. Setup databases
   • Create database using bin/rails db:create
   • Load database seed using bin/rails db:seed
   • Migrate database bin/rails db:migrate
6. Launch server
   • bin/rails server

Frontend

1. Install Node.js and node modules required for this project.
   • Install node js using sudo dnf install nodejs for Fedora (Our project uses node with version of v22.11.0)
   • Confirm Node.js installation by node --version which outputs something like v22.11.0.
2. Install node modules
   • cd ssd_emu/vue-client
   • Install node modules by running npm i.
3. Run the project
   • npm run dev
   • Check localhost:5173 to make sure it is running.

How to use

Creating new machine

1. Create a new machine by clicking on Create new machine available in Left Navigation Pane under List all machines

Credits

@ssd_team

TODOs

• Integrate docker component with slurm built inside.
• Use websocket to simulate ssh environment.
• Update missions page with documentation and challenge.
• Add architecture image on each machine page using mermaidJS