Multipass

Follow the download instructions here. For Windows users, we recommend using WSL and then following the Linux install instructions. We’re found this provides the most seemless install experience.

https://multipass.run/

We want to download Ubuntu 20.4

Lets make multipass can downkoad Ubuntu 20.4 image through the internet.

In a shell

$ multipass find

Image                       Aliases           Version          Description
snapcraft:core18            18.04             20201111         Snapcraft builder for Core 18
snapcraft:core20            20.04             20210921         Snapcraft builder for Core 20
18.04                       bionic            20220523         Ubuntu 18.04 LTS
20.04                       focal,lts         20220505         Ubuntu 20.04 LTS
21.10                       impish            20220309         Ubuntu 21.10
22.04                       jammy             20220506         Ubuntu 22.04 LTS
anbox-cloud-appliance                         latest           Anbox Cloud Appliance
charm-dev                                     latest           A development and testing environment for charmers
docker                                        latest           A Docker environment with Portainer and related tools
minikube                                      latest           minikube is local Kubernetes

We can see Ubuntu 20.04 on this line:

20.04                       focal,lts         20220505         Ubuntu 20.04 LT

This means that we can use the alias focal to download the image. Run the following command:

$ multipass launch --name=mininet focal

Launched: mininet

This will create a randomly generated in this case prudent-escargot

We can verify this name with multipass list:

$ multipass list

Name                    State             IPv4             Image
mininet	                Running           192.168.64.3     Ubuntu 20.04 LTS

To ssh into the VM run the following

$ multipass shell <NAME>

#!/bin/bash

QTR=25wi

sudo apt-get update
sudo apt-get install -y mininet python3 unzip net-tools xterm

wget https://courses.cs.washington.edu/courses/cse461/$QTR/projects/project2/resources/project2.zip
unzip project2.zip

# install Pox
cd ~/
git clone git@github.com:noxrepo/pox.git

# Move the project file to the right repo
sudo cp ~/461_mininet/pox/* ~/pox/pox/misc/

Congratulations you are done with the important stuff!

To stop VM from running:

$ multipass stop <NAME>

To start VM again

$ multipass start <NAME>

To delete VM space off your machine

$ multipass delete <NAME>

First generate a public-private key pair (if you dont already have one) and place the public key in the multipass VM. This will allow you to get SSH access to the VM a bit easier.

To put your public key in the VM multipass exec mininet -- bash -c "echo `cat ~/.ssh/<public_key>.pub` >> ~/.ssh/authorized_keys"

Use multipass list to get the IP address of the VM and how you should be able to SSH into it. ubuntu is the default user. ssh ubuntu@<ip_address>

The process is much more difficult on Windows.

1. In powershell, copy your public key to your clipboard cat ~/.ssh/<public_key>.pub
2. Now open WSL. First, run the following commands:

sudo apt install openssh-server
sudo service ssh start
sudo service ssh status  // ensure the service is running

3. Still inside WSL, open multipass VM multipass shell mininet
4. Inside your multipass VM, vi ~/.ssh/authorized_keys and append your public key to the file
5. Now exit from your multipass VM back into WSL
6. Inside WSL again, use multipass list to copy the IPv4 address associated with your ubuntu VM.
7. In powershell again, run ssh -J <wsl_username>@localhost ubuntu@<multipass_vm_ipv4>. You can now SSH into your multipass VM from Windows.
8. In VS Code SSH extension, when prompted, enter the SSH command and voila!
9. Once you’re done, it’s also best practice to do sudo service ssh stop for network security.

Whenever you attempt to reconnect via VS code, ensure that 1) WSL is running 2) ssh service is running in WSL 3) the multipass VM is running.