import this
257e36ddcb
* create VM init and config scripts * PR ready for review * address review comments * syntax fix
109 lines
2.9 KiB
Bash
109 lines
2.9 KiB
Bash
#!/bin/bash
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# check if noble-server-cloudimg-amd64.img is in working dir - if not, wget it
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if [[ ! -f noble-server-cloudimg-amd64.img ]]; then
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echo "Base image not found. Downloading noble-server-cloudimg-amd64.img..."
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wget https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img
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if [[ $? -ne 0 ]]; then
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echo "Error: Failed to download the base image. Exiting."
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exit 1
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fi
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fi
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# prompt for VM_NAME
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read -p "Enter VM name: " VM_NAME
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if [[ -z "$VM_NAME" ]]; then
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echo "Error: VM_NAME cannot be empty. Exiting."
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exit 1
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fi
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# prompt for PASSWORD w silent input
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read -s -p "Enter password for the VM: " PASSWORD
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echo
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if [[ -z "$PASSWORD" ]]; then
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echo "Error: PASSWORD cannot be empty. Exiting."
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exit 1
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fi
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# prompt for number of vCPUs
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read -p "Enter the number of vCPUs for the VM: " VCPUS
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if [[ -z "$VCPUS" || ! "$VCPUS" =~ ^[0-9]+$ ]]; then
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echo "Error: Invalid number of vCPUs. Exiting."
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exit 1
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fi
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# prompt for RAM size with suggestions
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DEFAULT_RAM=4096
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HALF_RAM=$((DEFAULT_RAM / 2))
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DOUBLE_RAM=$((DEFAULT_RAM * 2))
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TRIPLE_RAM=$((DEFAULT_RAM * 3))
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FOUR_TIMES_RAM=$((DEFAULT_RAM * 4))
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SIX_TIMES_RAM=$((DEFAULT_RAM * 6))
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EIGHT_TIMES_RAM=$((DEFAULT_RAM * 8))
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echo "Choose the amount of RAM for the VM:"
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echo "1) $HALF_RAM MB"
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echo "2) $DEFAULT_RAM MB (recommended)"
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echo "3) $DOUBLE_RAM MB"
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echo "4) $TRIPLE_RAM MB"
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echo "5) $FOUR_TIMES_RAM MB"
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echo "6) $SIX_TIMES_RAM MB"
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echo "7) $EIGHT_TIMES_RAM MB"
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read -p "Enter your choice (1-7) or specify a custom amount in MB: " RAM_CHOICE
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case $RAM_CHOICE in
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1) RAM=$HALF_RAM ;;
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2) RAM=$DEFAULT_RAM ;;
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3) RAM=$DOUBLE_RAM ;;
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4) RAM=$TRIPLE_RAM ;;
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5) RAM=$FOUR_TIMES_RAM ;;
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6) RAM=$SIX_TIMES_RAM ;;
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7) RAM=$EIGHT_TIMES_RAM ;;
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*)
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if [[ "$RAM_CHOICE" =~ ^[0-9]+$ ]]; then
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RAM=$RAM_CHOICE
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else
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echo "Invalid choice. Exiting."
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exit 1
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fi
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;;
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esac
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# define image path
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IMAGE_PATH="/var/lib/libvirt/images/${VM_NAME}.img"
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# copy the base image
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echo "Copying the base image to $IMAGE_PATH..."
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cp noble-server-cloudimg-amd64.img "$IMAGE_PATH"
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# install guestfs-tools if missing
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echo "Checking and installing guestfs-tools if needed..."
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if ! dpkg -l | grep -q guestfs-tools; then
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sudo apt update && sudo apt install guestfs-tools -y
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fi
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# set root password inside the image
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echo "Setting root password inside the VM image..."
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virt-customize -a "$IMAGE_PATH" --root-password password:"$PASSWORD"
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# resize the image
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echo "Resizing the image by +100G..."
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qemu-img resize "$IMAGE_PATH" +100G
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# install the VM and run log in prompt
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echo "Starting VM installation..."
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virt-install \
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--name "$VM_NAME" \
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--ram="$RAM" \
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--vcpus="$VCPUS" \
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--cpu host \
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--hvm \
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--disk bus=virtio,path="$IMAGE_PATH" \
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--network bridge=br0 \
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--graphics none \
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--console pty,target_type=serial \
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--osinfo ubuntunoble \
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--import
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echo "VM $VM_NAME has been successfully installed!"
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