I'm documenting this mostly for myself so that I the steps to redo if I forget.
Background:
Setup up VM using Apple Virtualization (as opposed to QEMU) using UMT https://mac.getutm.app/
We need ARM64 versions of:
1) linux kernel
2) ramdisk
3) linux image
I use Ubuntu and the cloud images has all the items ready for use.
Linux Kernel file
in https://cloud-images.ubuntu.com/jammy/current/unpacked/
Look for "jammy-server-cloudimg-arm64-vmlinuz-generic" and download
rename the file to gz and gunzip the file.
```mv jammy-server-cloudimg-arm64-vmlinuz-generic jammy-server-cloudimg-arm64-vmlinuz-generic.gz && gunzip jammy-server-cloudimg-arm64-vmlinuz-generic.gz```
Ramdisk
Look for " jammy-server-cloudimg-arm64-initrd-generic" and download
Virtual Disk Image
Download image file from https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-arm64.tar.gz and untar the file
Optional: resize img file
(This assumes you already have qemu installed via brew)
If you want to add additional 80G to the disk space for example.
```/opt/homebrew/bin/qemu-img resize -f raw jammy-server-cloudimg-arm64.img +80G```
Obtain iso file for cloud init
My personal setup
system login credentials are baked into user-data.yaml
which builds an iso file called 'seed.iso'. which will be used for below instuctions.
alternatively for a basic one see this version
additional reference : https://github.com/frederickding/Cloud-Init-ISO
Finally, set up VM
Launch UTM
1) Add VM
2) Select Virtualize
4) select Apple Virtualization
5) Uncompressed Linux kernel select "jammy-server-cloudimg-arm64-vmlinuz-generic"
6) Linux ramdisk select "jammy-server-cloudimg-arm64-initrd-generic"
7) Linux Root FS image select "jammy-server-cloudimg-arm64.img"
8) boot iso select "seed.iso" ( for user and package provisioning)
9) boot argument enter : console=hvc0 root=/dev/vdb (depends on the order of your storage devices, in this instruction /dev/vda is the iso file, and dev/vdb is the disk)
10) continue and set the rest of the VM resources or leave it default,
12) you will see a prompt, shortly, the cloud init scripts will update, provision the user and my cloud init will restart system
13) log in with configured user and verify diskspace ```df -h```
as with the hyper-v version, I don't seem to require to resize2fs
