Vscode

Accessing VS Code on Rockfish

You can access Visual Studio Code on Rockfish in two ways:

Using Open OnDemand (Web Portal)

  1. Connect to the Hopkins VPN Rockfish’s Open OnDemand (OOD) is only accessible within the JHU network.

  2. Open the portal Go to: https://portal.rockfish.jhu.edu

  3. Login Use your Rockfish credentials.

  4. Launch VS Code - On the dashboard, click “VSCode Server IDE/Editor” - Choose your wall time, number of cores, and partition - Click Launch

  5. Connect When the session is ready, click the “Connect to VS Code” button on the new page.

Using vscode-server.sh on the Command Line

This method is great for advanced users who prefer working directly via Slurm.

Connect to Rockfish (login node)

Create the Slurm script

Run the script with desired parameters (use -h for help):

vscode-server.sh -c 6 -t 02:00:00 -p parallel

Submit the job

sbatch VSCode-Server.slurm.script

Locate the output file

ls -ltr vscode-server.job*

This will output a file like: vscode-server.job.<jobid>.out

Get SSH tunnel instructions

cat vscode-server.job.<jobid>.out

The file includes an ssh -N -L ... command for setting up the SSH tunnel.

Create the SSH tunnel (from your local machine)

ssh -N -L <local_port>:localhost:<remote_port> <your_user>@rockfish.jhu.edu

  • Paste the full command from the .out file

  • Enter your Rockfish password when prompted

  • Leave this terminal open (minimized is fine)

Open VS Code in your browser

Go to http://localhost:<local_port> (as provided in the .out file)

Notes

  • You can run vscode-server.sh -h to see available options and usage.

  • Don’t forget to close your job when done:

scancel -f <jobid>