![]() This can be important in production environments when you need to go back to the exact way code was built to resolve a problem. Have you ever set up a development environment and then a few years later found out it was all broken because of updates? With virtual machines that never has to happen again. That’s a bit involved, but you can read the documentation to find out how. The other thing you can do is use Packer to package a new image of your own. Note that the standard allows for several formats, but apparently Multipass only supports YAML. ![]() You create a yaml file (known as a cloud init file) and set things up like users, packages, ssh keys, and the like. If you have things you always have to set up, you can automate that. There’s also a GUI that sits in your system tray, but if you aren’t running virtual machines as your own user, that isn’t as useful to you. There are other commands available to run programs in a machine or set up networking. Mounts: /home/alw/hackaday => /home/alw/hackaday If you lose track of everything, you can ask about a particular machine: multipass info hackaday-vm If you want to share data, you can mount a host folder into the virtual machine: multipass mount ~/hackaday hackaday-vm However, many times you just want a shell into the new machine. There are ways to route traffic around if you need to do that. So what do you do with it? By default, the machine starts up with a private network that you can only access from the host machine. You can control them with start and stop. Once you have a bunch of virtual machines, you might want to see how they are doing: multipass list You can also provide a name for the virtual machine: multipass launch -c 4 -m 6G -d 10G -n hackaday-vm bionic On the Run Say you want 4 CPUs, 6G of RAM, and a 10G disk. However, you usually want a little more control since the default is one CPU core, a gigabyte of RAM, and 5G of disk storage. You can launch a default instance by issuing the command: multipass launch bionic Suppose you want to do some testing in a Ubuntu bionic (18.04) instance. Naturally, most of the images are Ubuntu versions, although there are a few other appliances like anbox and nextcloud available. You can see all the images available by running: multipass find The /proc/cpuinfo file should have a vmx or svm flag (actually, several of them one for each core). You should be sure that you are on a computer that can support virtual machines. ![]() The process varies by platform, but on Ubuntu, installing Multipass is as easy as: sudo snap install multipass If you have a set configuration, you can even set up predefined setups using a YAML file. Once you have it installed, starting up a new Ubuntu instance is trivial. Granted, most of the virtual machines in question are variations of Ubuntu, but there are some additional images available, and you can create your own. Using Multipass from Canonical, the makers of Ubuntu, you can easily spin up virtual machines under Linux, Mac, or Windows. Wouldn’t it be nice if you could do the same for virtual machines? You can. This allows you, essentially, to deploy a container with Kubernetes from a Windows machine.It wasn’t long ago that we looked at easily creating Docker containers from the command line so you could just easily spin up a virtual environment for development. You can use Multipass to set up Microk8s on a Multipass instance. Kubernetes is a great option for running effective applications. This allows for more efficient management of system resources. Kubernetes allows you to manage workloads and services in a container. You can set this ad blocker all over the network with the Raspberry Pi, but it's a bit more convenient to set this up with Multipass. Pi-Hole is a popular network-based ad blocker for Linux. You can then ask Multipass to open the application by pointing it at the computer's IP address. Once completed, you can install the application whose GUI you want to see in a Multipass instance. To do this, you will have to set XQuartz to Allow connections from network clients. You can use XQuartz to display Linux GUI applications on macOS.
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