Minimal Cloud Images

Cloud-Init Image

How to prepare a cloud-init image.

Ubuntu 20.04

Download the latest version of the base image to one of your proxmox nodes:

curl -sSL https://cloud-images.ubuntu.com/minimal/releases/focal/release/ubuntu-20.04-minimal-cloudimg-amd64.img >/tmp/ubuntu-20.04-minimal-cloudimg-amd64.img

Create a cloud-init config to bootstrap the template:

cat <<'EOF'> /var/lib/vz/snippets/9003_bootstrap
#cloud-config
package_update: true
package_upgrade: true
ntp:
  enabled: true
  servers: ["pool.ntp.org"]
  ntp_client: systemd-timesyncd
ssh_deletekeys: true
ssh_genkeytypes: ["ed25519", "rsa"]
bootcmd:
- |
  sed -i 's/ENABLED=1/ENABLED=0/' /etc/default/motd-news
  systemctl disable motd-news.service motd-news.timer --now
runcmd:
- |
  curl -sSL https://git.giftfish.de/ston1th/cleanup/raw/branch/master/ubuntu_2004_min.sh >/tmp/cleanup.sh
  [ "$(sha256sum /tmp/cleanup.sh|cut -d" " -f1)" = "9fbd939eb8d1ef6157a61bb984a5045339ce361596b8a99a8847280cc785b726" ] && sh /tmp/cleanup.sh || echo "error: cleanup script hash does not match" >&2
power_state:
  mode: poweroff
EOF

Create the template VM:

qm stop 9003; qm destroy 9003
qm create 9003 --name ubuntu-2004-min --memory 2048 --net0 virtio,bridge=vmbr0
qm importdisk 9003 /tmp/ubuntu-20.04-minimal-cloudimg-amd64.img local
qm set 9003 --scsihw virtio-scsi-pci --scsi0 local:9003/vm-9003-disk-0.raw
qm set 9003 --ide0 local:cloudinit
qm set 9003 --boot c --bootdisk scsi0
qm set 9003 --serial0 socket --vga serial0
qm set 9003 --cicustom "user=local:snippets/9003_bootstrap"
qm set 9003 --ipconfig0 ip=dhcp,ip6=dhcp

qm start 9003
sleep 10;while :; do qm status 9003|grep -q stopped && break; done
qm set 9003 --cicustom ""
qm set 9003 --ipconfig0 ""
qm template 9003

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Minimal Cloud Images

Cloud-Init Image

Ubuntu 20.04

1.7 KiB

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