barebox/scripts/create-template-vm.sh at main · Cooperation-org/barebox · GitHub

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#!/bin/bash
# Create a production VM template from Ubuntu cloud image.
# Run this on the Proxmox HOST.
#
# Prerequisites:
#   - Download Ubuntu cloud image:
#     wget -O /var/lib/vz/template/iso/ubuntu-24.04-cloudimg.img \
#       https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
#   - Have your SSH public key available
#
# Configure via environment or arguments:
#   TEMPLATE_VM_ID  (default: 9000)
#   SSH_KEY_FILE    (default: ~/.ssh/id_ed25519.pub)
#   BRIDGE_GATEWAY  (default: 10.0.0.1)
#
# Usage: sudo ./create-template-vm.sh [vmid] [name]
set -euo pipefail

VMID="${1:-${TEMPLATE_VM_ID:-9000}}"
NAME="${2:-ubuntu-prod-template}"
STORAGE="local"
CLOUD_IMAGE="/var/lib/vz/template/iso/ubuntu-24.04-cloudimg.img"
MEMORY="2048"
CORES="2"
DISK_SIZE="20G"
SSH_KEY_FILE="${SSH_KEY_FILE:-$HOME/.ssh/id_ed25519.pub}"
GATEWAY="${BRIDGE_GATEWAY:-10.0.0.1}"
TEMP_IP="10.0.0.250/24"
CIUSER="${CLOUD_INIT_USER:-ubuntu}"

echo "=== Creating template VM $VMID ($NAME) ==="

if [ ! -f "$CLOUD_IMAGE" ]; then
  echo "ERROR: Cloud image not found: $CLOUD_IMAGE" >&2
  echo "Download it first:" >&2
  echo "  wget -O $CLOUD_IMAGE https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img" >&2
  exit 1
fi

if [ ! -f "$SSH_KEY_FILE" ]; then
  echo "ERROR: SSH key file not found: $SSH_KEY_FILE" >&2
  echo "Set SSH_KEY_FILE to your public key path" >&2
  exit 1
fi

if qm status "$VMID" &>/dev/null; then
  echo "ERROR: VM $VMID already exists" >&2
  exit 1
fi

echo "Creating VM..."
qm create "$VMID" \
  --name "$NAME" \
  --memory "$MEMORY" \
  --cores "$CORES" \
  --cpu cputype=host \
  --net0 virtio,bridge=vmbr0 \
  --scsihw virtio-scsi-pci \
  --serial0 socket \
  --vga serial0 \
  --agent enabled=1

echo "Importing cloud image disk..."
qm disk import "$VMID" "$CLOUD_IMAGE" "$STORAGE" --format qcow2

echo "Attaching disk..."
qm set "$VMID" --scsi0 "${STORAGE}:${VMID}/vm-${VMID}-disk-0.qcow2,ssd=1"

echo "Resizing disk to $DISK_SIZE..."
qm disk resize "$VMID" scsi0 "$DISK_SIZE"

echo "Configuring boot and cloud-init..."
qm set "$VMID" \
  --boot order=scsi0 \
  --ide2 "${STORAGE}:cloudinit" \
  --ciuser "$CIUSER" \
  --ipconfig0 "ip=${TEMP_IP},gw=${GATEWAY}" \
  --nameserver "1.1.1.1" \
  --sshkeys "$SSH_KEY_FILE"

echo ""
echo "=== VM $VMID created ==="
echo ""
echo "Next steps:"
echo "  1. Start the VM:  qm start $VMID"
echo "  2. Wait for boot, then SSH in:  ssh ${CIUSER}@10.0.0.250"
echo "  3. Copy and run prepare-prod-template.sh:"
echo "     scp scripts/prepare-prod-template.sh ${CIUSER}@10.0.0.250:/tmp/"
echo "     ssh ${CIUSER}@10.0.0.250 'sudo bash /tmp/prepare-prod-template.sh'"
echo "  4. Shut down the VM:  qm shutdown $VMID"
echo "  5. Convert to template:  qm template $VMID"
echo ""
echo "To clone from template:"
echo "  qm clone $VMID <new-vmid> --name <app-name> --full"
echo "  qm set <new-vmid> --ipconfig0 ip=10.0.0.<x>/24,gw=${GATEWAY}"
echo "  qm start <new-vmid>"
echo ""