VS Code in a Web Browser without Open OnDemand

Run the VS Code Code-Server on DeltaAI in manual mode (without Open OnDemand) by following these steps:

In a terminal, ssh log in to DeltaAI (see Direct Access Login Nodes).
Navigate to /sw/external/vscode/code-server/bin.

Run the following command to start the server. Replace dtai-loginNN with the login node you are logged in to.

./code-server --bind-addr dtai-loginNN:8899

In the following example, the user, username, is logged in to dtai-login03:

[username@dtai-login03:/sw/external/vscode/code-server/bin> ./code-server --bind-addr dtai-login03:8899
[2025-02-21T21:07:08.237Z] info  code-server 4.96.4 b7ef8f9bd70cb5b342fa8ec8a0086bad676d8124
[2025-02-21T21:07:08.238Z] info  Using user-data-dir /u/username/.local/share/code-server
[2025-02-21T21:07:08.265Z] info  Using config file /u/username/.config/code-server/config.yaml
[2025-02-21T21:07:08.265Z] info  HTTP server listening on http://141.142.248.9:8899/
[2025-02-21T21:07:08.265Z] info    - Authentication is enabled
[2025-02-21T21:07:08.265Z] info      - Using password from /u/username/.config/code-server/config.yaml
[2025-02-21T21:07:08.265Z] info    - Not serving HTTPS
[2025-02-21T21:07:08.265Z] info  Session server listening on /u/username/.local/share/code-server/code-server-ipc.sock
[15:09:20]

Open a second terminal window.

In the second terminal, SSH tunnel to the login node running code-server with the following command. Replace:

username with your Delta login username (in one place).
dtai-loginNN with the same login node you used in step 3 (in two places).

ssh -l username -L 127.0.0.1:8899:dtai-loginNN.delta.ncsa.illinois.edu:8899 dtai-loginNN.delta.ncsa.illinois.edu

In the following example, the user, username is logged in to dtai-login03:

username@XXXX-00000 ~ % ssh -l username -L 127.0.0.1:8899:dtai-login03.delta.ncsa.illinois.edu:8899 dtai-login03.delta.ncsa.illinois.edu
...
Success. Logging you in...
Last failed login: Fri Feb 21 15:08:21 CST 2025 from 169.197.147.6 on ssh:notty
There was 1 failed login attempt since the last successful login.
Last login: Fri Feb 21 15:06:30 2025 from 169.197.147.6
gh-login03.delta.ncsa.illinois.edu (141.142.248.9)
  OS: SLES 15.5   HW: Foxconn   CPU: 144x    RAM: 239 GB
      CrayOS      NVIDIA Grace-Grace aarch64

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Read the config.yaml file noted when you started the server (step 3) and copy the password to your clipboard.

username@gh-login03:~> more ~/.config/code-server/config.yaml
bind-addr: 127.0.0.1:8080
auth: password
password: 1c431be0159d77b9c44b62cd
cert: false

Open a web browser on your local desktop/laptop and go to the following URL.
```
http://127.0.0.1:8899
```
In the password field, enter the password you copied in step 6 and begin using VS Code in your browser.