Been a while since I last posted. For basically everything I do Linux-wise, I use Ubuntu. Specifically the Long Term Support versions, which are released on even years in April (April 2020, April 2022, etc.), hence the 22.04 designation of the latest LTS, Jammy. I had standardized on 20.04 (Focal) for everything, but am finding that various packages I use that I expect to be available on 20.04, aren’t. But they are present in standard, default package lists for Jammy 22.04. Last night I was creating a new VM to transfer this very blog to my shiny, new co-located server. I was going to use the Ubuntu 20.04 Proxmox Cloud Init Image Script template I wrote up a bit ago. Then I stopped and realized I should update it. So I changed 2004 everywhere in the script to 2204 and ‘focal’ to ‘jammy’, reran it, and now I have a fancy new cloud init script for Ubuntu 22.04. Note that this script does require you to install libguestfs-tools, as indicated in the previous cloud-init post.
############### # things to double-check: # 1. user directory # 2. your SSH key location # 3. which bridge you assign with the create line (currently set to vmbr100) # 4. which storage is being utilized (script uses local-zfs) ############### rm -f jammy-server-cloudimg-amd64.img wget -q https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img sudo virt-customize -a jammy-server-cloudimg-amd64.img --install qemu-guest-agent sudo virt-customize -a jammy-server-cloudimg-amd64.img --ssh-inject root:file:/home/austin/id_rsa.pub sudo qm destroy 9022 sudo qm create 9022 --name "ubuntu-2204-cloudinit-template" --memory 2048 --cores 2 --net0 virtio,bridge=vmbr100 sudo qm importdisk 9022 jammy-server-cloudimg-amd64.img local-zfs sudo qm set 9022 --scsihw virtio-scsi-pci --scsi0 local-zfs:vm-9022-disk-0 sudo qm set 9022 --boot c --bootdisk scsi0 sudo qm set 9022 --ide2 local-zfs:cloudinit sudo qm set 9022 --serial0 socket --vga serial0 sudo qm set 9022 --agent enabled=1 sudo qm template 9022 rm -f jammy-server-cloudimg-amd64.img echo "next up, clone VM, then expand the disk" echo "you also still need to copy ssh keys to the newly cloned VM"
I suppose for a full automation I should get user with a whoami command, assign it to a variable, and use that throughout the script. That’s a task for another day.
I also added a line in my crontab to have this script run weekly, so the image is essentially always up to date. I’ll run both 20.04 and 22.04 in parallel for a bit but anticipate that I can turn off the 20.04 job fairly soon.
# m h dom mon dow command 52 19 * * TUE sleep $(( RANDOM \% 60 )); /usr/bin/bash /home/austin/ubuntu-2004-cloud-init-create.sh >> /home/austin/ubuntu-template.log 2>&1 52 20 * * TUE sleep $(( RANDOM \% 60 )); /usr/bin/bash /home/austin/ubuntu-2204-cloud-init-create.sh >> /home/austin/ubuntu-2204-template.log 2>&1
One reply on “Proxmox Ubuntu 22.04 Jammy LTS Cloud-init Image Script”
Check out this github repo for this, but it also does the downloads, checks the SHA256 hash of the download, copies your SSH keys, etc for multiple versions and multiple distros: