Connection to an Openstack VM

SSH connection

Once you have created your VM, it is reachable through the allo-psmn gateway, like any other compute node of the PSMN clusters (see documentation)

When you are connected to allo-psmn, you have to do ssh $LOGIN@172.16.43.XX (replace XX by the last digits of the floating IP address of your VM).

Replace $LOGIN by the following:

Image	Login
debian13-base	debian
ubuntu24-base	ubuntu
ubuntu24-desktop-base	ubuntu
ubuntu24-desktop-imaging-base	ubuntu
rocky9-base	rocky
debian13-psmn	your PSMN login
ubuntu24-psmn	your PSMN login
ubuntu24-desktop-psmn	your PSMN login
ubuntu24-desktop-imaging-psmn	your PSMN login
rocky9-psmn	your PSMN login

Whichever image you choose, you have administrator rights (sudo).

X2GO connexion

If you choose a desktop image, you can use X2GO client to connect to it (see documentation)

Configure a new connection with the following items:

Important

On desktop images the upper-right logout button is inactive. To log out, you must open the main menu (upper-left) and click the logout icon

Tigervnc (alternative to X2Go)

In case you encounter issues with X2Go you can use Tigervnc.

Install TIgerVNC client

On Debian/Ubuntu: sudo apt install tigervnc-viewer
For others Linux distros, Mac or Windows see https://sourceforge.net/projects/tigervnc/files/stable/1.16.0/

Create SSH tunnel

You need to establish a SSH tunnel in order to use Tigervnc. Use this command:

ssh -L 59000:172.16.43.XX:5901 $LOGIN@allo-psmn.psmn.ens-lyon.fr

(replace XX by the last digits of your floating IP and $LOGIN by your PSMN login).

Don’t exit the terminal.

Launch VNC server

Open another terminal
Connect to your VM with SSH
Launch vncserver. You will be asked to set a password. This password will be used to connect to the VM with VNC. You will be asked to enter a view-only password, answer no.

Hint

This password will remain the same for all your *-psmn VMs

Connect to your VM

Launch your VNC client and enter localhost:59000
Enter your the password you defined earlier

Important

On desktop images the upper-right logout button is inactive. To log out, you must open the main menu (upper-left) and click the logout icon