VSCode: How to connect to Remote SSH Host, inside an SSH Host?

I have hardware available through my university jump host, to which I connect to through ssh:

$ ssh username@login.university.edu
Password: *******

$ ssh hardware1
Password: *******

[my_computer] --> [login.university.edu] --> [hardware1]

I can get a window to login.university.edu with VSCode Remote SSH Connect to Host, but then once there I use the terminal to SSH into hardware1, therefore I can't use the debugger on hardware1.

How could I get a window to hardware1? Or else how can I customize launch.json in order to run ssh hardware1 and input my password?

Solution

This one works for me with Flask debugging.

On your laptop:

Create or open ~/.ssh/config and set your ssh connection (on windows: c:\Users\username\.ssh\config)

Host university
    HostName login.university.edu
    User username
    IdentityFile ~/.ssh/university_key

Host hardware1
    HostName hardware1
    User username
    IdentityFile ~/.ssh/hardware1_key
    ProxyJump university

Create university_key on your laptop

cd ~/.ssh
ssh-keygen -f university_key # enter - enter
ssh-copy-id -i university_key.pub username@login.university.edu

On your jump server

cd ~/.ssh
ssh-keygen -f hardware1_key # enter - enter
ssh-copy-id -i hardware1_key.pub username@hardware1.university.edu # if this isn't copy the key try username@hardware1

Two files created in the folder: hardware1_key and hardware1_key.pub Copy this two file to your local (laptop) ~/.ssh folder.

Now you can login

to the jump with: ssh university
to the tunnel: ssh hardware1 -v

If you are able to connect from CLI to your hardware1, open the VS Code.
If not, your hardware1_key.pub is not copied to hardware1, try to fix this one: username@hardware1.university.edu <- this is maybe wrong

On VS Code

Check your `~/.ssh/config` file

Press CTRL+SHIT+P Choose Remote-SSH: Open SSH Configuration file... From the dropdown menu choose your config file: ~/.ssh/config Check if everything right (must be... if you can login from CLI)

Connect to host

Press CTRL+SHIT+P
Choose Remote-SSH: Connect to Host...
From the dropdown menu choose university or hardware1
A new window opened. Click on the Open Folder button, choose a folder you want.
Click on Ok

Now you can use even debug mode, but the interpreter must be installed on the host you connected.
For example if you want debugging a Python code on hardware1,
you need to install Python 3.7 or higher on hardware1...