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# Ubuntu VM Management with Cloud Hypervisor
This directory contains scripts for creating and managing Ubuntu VMs using Cloud Hypervisor with btrfs thin provisioning.
## Scripts Overview
1. **`ubuntu_vm_start.sh`** - Creates and starts new VMs
2. **`ubuntu_vm_manage.sh`** - Manages existing VMs (list, status, console, stop, etc.)
3. **`setup_vm_network.sh`** - Sets up networking for SSH access to VMs
## Prerequisites
- Root access
- Btrfs filesystem (script will detect and guide setup)
- Cloud Hypervisor installed
- Basic networking tools
## Quick Start
### 1. Set up networking (one-time setup)
```bash
sudo ./setup_vm_network.sh
```
### 2. Create and start a VM
```bash
sudo ./ubuntu_vm_start.sh my-vm 2048 2
```
This creates a VM named "my-vm" with 2GB RAM and 2 CPU cores.
### 3. List all VMs
```bash
sudo ./ubuntu_vm_manage.sh list
```
### 4. Connect to VM console
```bash
sudo ./ubuntu_vm_manage.sh console my-vm
```
## Detailed Usage
### Creating VMs
```bash
sudo ./ubuntu_vm_start.sh <vm_name> <memory_mb> <cpu_cores>
```
**Examples:**
```bash
# Create a small VM
sudo ./ubuntu_vm_start.sh test-vm 1024 1
# Create a larger VM
sudo ./ubuntu_vm_start.sh dev-vm 4096 4
```
**What happens:**
- Downloads Ubuntu 24.04 cloud image (first time only)
- Creates btrfs subvolumes for thin provisioning
- Sets up cloud-init with default user
- Creates network interfaces
- Starts the VM with Cloud Hypervisor
### Managing VMs
```bash
sudo ./ubuntu_vm_manage.sh <command> [vm_name]
```
**Available commands:**
| Command | Description | Example |
|---------|-------------|---------|
| `list` | Show all VMs and their status | `./ubuntu_vm_manage.sh list` |
| `status <vm>` | Detailed status of specific VM | `./ubuntu_vm_manage.sh status my-vm` |
| `console <vm>` | Connect to VM console | `./ubuntu_vm_manage.sh console my-vm` |
| `stop <vm>` | Stop a running VM | `./ubuntu_vm_manage.sh stop my-vm` |
| `delete <vm>` | Delete VM completely | `./ubuntu_vm_manage.sh delete my-vm` |
| `ssh <vm>` | Show SSH connection info | `./ubuntu_vm_manage.sh ssh my-vm` |
### Accessing VMs
#### Method 1: Console Access (Always Available)
```bash
sudo ./ubuntu_vm_manage.sh console my-vm
```
- Direct serial console access
- No network required
- Press `Ctrl+A` then `X` to exit
- Default login: `ubuntu` / `ubuntu`
#### Method 2: SSH Access (Requires Network Setup)
1. Set up networking first:
```bash
sudo ./setup_vm_network.sh
```
2. Find VM IP address:
```bash
vm-ips
# or
arp -a | grep 192.168.100
```
3. SSH to the VM:
```bash
ssh ubuntu@192.168.100.X
```
Default password: `ubuntu`
## Network Configuration
The `setup_vm_network.sh` script configures:
- **Bridge interface**: `br0` with IP `192.168.100.1/24`
- **DHCP server**: Assigns IPs `192.168.100.10-100` to VMs
- **NAT**: Enables internet access for VMs
- **DNS**: Uses Google DNS (8.8.8.8, 8.8.4.4)
### Network Troubleshooting
1. **Check bridge status:**
```bash
ip addr show br0
```
2. **Check VM IP assignments:**
```bash
vm-ips
```
3. **Check DHCP leases:**
```bash
cat /var/lib/dhcp/dhcpd.leases
```
4. **Restart networking:**
```bash
systemctl restart dnsmasq
```
## Storage (Btrfs)
VMs use btrfs subvolumes for efficient storage:
- **Base image**: Shared read-only Ubuntu image
- **VM snapshots**: Copy-on-write clones for each VM
- **Thin provisioning**: Only changed blocks use disk space
### Storage locations:
- Base images: `/var/lib/vms/base/`
- VM instances: `/var/lib/vms/vms/<vm-name>/`
### Storage commands:
```bash
# List subvolumes
btrfs subvolume list /var/lib/vms
# Show space usage
btrfs filesystem usage /var/lib/vms
# Show individual VM sizes
du -sh /var/lib/vms/vms/*
```
## VM Configuration
### Default VM Setup:
- **OS**: Ubuntu 24.04 LTS
- **User**: `ubuntu` (password: `ubuntu`)
- **Sudo**: Passwordless sudo enabled
- **SSH**: Enabled with password authentication
- **Packages**: curl, wget, git, htop, vim pre-installed
### Customizing VMs:
Edit the cloud-init configuration in `ubuntu_vm_start.sh` to:
- Add SSH keys
- Install additional packages
- Set custom passwords
- Configure services
## Troubleshooting
### VM won't start:
1. Check if Cloud Hypervisor is installed:
```bash
which cloud-hypervisor
```
2. Check btrfs filesystem:
```bash
btrfs filesystem show /var/lib/vms
```
3. Check available resources:
```bash
free -h
nproc
```
### Can't connect to VM:
1. Verify VM is running:
```bash
./ubuntu_vm_manage.sh status my-vm
```
2. Try console access first:
```bash
./ubuntu_vm_manage.sh console my-vm
```
3. Check network setup:
```bash
ip addr show br0
vm-ips
```
### VM is slow or unresponsive:
1. Check host resources:
```bash
top
iostat
```
2. Adjust VM resources:
- Stop VM: `./ubuntu_vm_manage.sh stop my-vm`
- Delete and recreate with different specs
## Security Notes
- Default password is `ubuntu` - change after first login
- Consider adding SSH keys instead of password auth
- VMs have internet access through NAT
- Console access requires root privileges on host
## Examples
### Create a development environment:
```bash
# Set up networking
sudo ./setup_vm_network.sh
# Create VM
sudo ./ubuntu_vm_start.sh dev-env 4096 4
# Wait for boot, then connect
sudo ./ubuntu_vm_manage.sh console dev-env
# Inside VM, change password and install tools
passwd
sudo apt update && sudo apt install -y build-essential nodejs npm
```
### Create multiple VMs:
```bash
# Create web server
sudo ./ubuntu_vm_start.sh web-server 2048 2
# Create database server
sudo ./ubuntu_vm_start.sh db-server 4096 2
# Create load balancer
sudo ./ubuntu_vm_start.sh lb 1024 1
# List all VMs
sudo ./ubuntu_vm_manage.sh list
```
## Performance Tips
1. **Use appropriate VM sizing** - Don't over-allocate resources
2. **Monitor host resources** - Ensure sufficient RAM/CPU
3. **Use btrfs compression** - Add `compress=zstd` mount option
4. **Regular cleanup** - Delete unused VMs to free space
5. **SSD storage** - Use SSD for better I/O performance
## Backup and Recovery
### Backup a VM:
```bash
# Stop VM first
sudo ./ubuntu_vm_manage.sh stop my-vm
# Create snapshot
sudo btrfs subvolume snapshot /var/lib/vms/vms/my-vm /var/lib/vms/backups/my-vm-$(date +%Y%m%d)
```
### Restore from backup:
```bash
# Delete current VM
sudo ./ubuntu_vm_manage.sh delete my-vm
# Restore from snapshot
sudo btrfs subvolume snapshot /var/lib/vms/backups/my-vm-20231215 /var/lib/vms/vms/my-vm

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tools/install_cloudhypervisor.sh
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@ -176,3 +176,5 @@ if command -v cloud-hypervisor &> /dev/null; then
else
error "Cloud Hypervisor installation failed. Binary not found in PATH."
fi
apt update && apt install -y genisoimage

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#!/bin/bash
# VM Network Setup Script
# This script sets up networking for VMs to enable SSH access
set -e
# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color
log() {
echo -e "${GREEN}[$(date +'%Y-%m-%d %H:%M:%S')] $1${NC}"
}
warn() {
echo -e "${YELLOW}[$(date +'%Y-%m-%d %H:%M:%S')] WARNING: $1${NC}"
}
error() {
echo -e "${RED}[$(date +'%Y-%m-%d %H:%M:%S')] ERROR: $1${NC}"
exit 1
}
info() {
echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')] INFO: $1${NC}"
}
# Check if running as root
if [ "$EUID" -ne 0 ]; then
error "This script must be run as root"
fi
BRIDGE_NAME="br0"
BRIDGE_IP="192.168.100.1/24"
NETWORK="192.168.100.0/24"
log "Setting up VM networking..."
# Check if bridge already exists and has IP
if ip link show "$BRIDGE_NAME" &>/dev/null; then
if ip addr show "$BRIDGE_NAME" | grep -q "192.168.100.1"; then
info "Bridge $BRIDGE_NAME already configured with IP"
else
log "Adding IP address to existing bridge..."
ip addr add "$BRIDGE_IP" dev "$BRIDGE_NAME"
fi
else
log "Bridge $BRIDGE_NAME not found. It will be created when VMs start."
fi
# Enable IP forwarding
log "Enabling IP forwarding..."
echo 1 > /proc/sys/net/ipv4/ip_forward
# Make IP forwarding persistent
if ! grep -q "net.ipv4.ip_forward=1" /etc/sysctl.conf; then
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
log "IP forwarding made persistent in /etc/sysctl.conf"
fi
# Set up NAT for VM network
log "Setting up NAT for VM network..."
# Remove existing rules to avoid duplicates
iptables -t nat -D POSTROUTING -s "$NETWORK" -j MASQUERADE 2>/dev/null || true
iptables -D FORWARD -i "$BRIDGE_NAME" -o "$BRIDGE_NAME" -j ACCEPT 2>/dev/null || true
iptables -D FORWARD -i "$BRIDGE_NAME" -j ACCEPT 2>/dev/null || true
iptables -D FORWARD -o "$BRIDGE_NAME" -j ACCEPT 2>/dev/null || true
# Add new rules
iptables -t nat -A POSTROUTING -s "$NETWORK" -j MASQUERADE
iptables -A FORWARD -i "$BRIDGE_NAME" -o "$BRIDGE_NAME" -j ACCEPT
iptables -A FORWARD -i "$BRIDGE_NAME" -j ACCEPT
iptables -A FORWARD -o "$BRIDGE_NAME" -j ACCEPT
log "NAT rules configured"
# Install and configure dnsmasq for DHCP
if ! command -v dnsmasq &>/dev/null; then
log "Installing dnsmasq for DHCP..."
apt update && apt install -y dnsmasq
fi
# Configure dnsmasq for VM network
DNSMASQ_CONF="/etc/dnsmasq.d/vm-network.conf"
log "Configuring DHCP for VM network..."
cat > "$DNSMASQ_CONF" << EOF
# VM Network DHCP Configuration
# Only bind to the bridge interface to avoid conflicts with systemd-resolved
interface=$BRIDGE_NAME
bind-interfaces
# Disable DNS server functionality (only DHCP)
port=0
# DHCP configuration
dhcp-range=192.168.100.10,192.168.100.100,12h
dhcp-option=3,192.168.100.1
dhcp-option=6,8.8.8.8,8.8.4.4
# Disable reading /etc/hosts and /etc/resolv.conf
no-hosts
no-resolv
EOF
# Restart dnsmasq
systemctl restart dnsmasq
systemctl enable dnsmasq
log "DHCP server configured and started"
# Create a script to show VM IPs
cat > "/usr/local/bin/vm-ips" << 'EOF'
#!/bin/bash
echo "VM DHCP Leases:"
echo "==============="
if [ -f /var/lib/dhcp/dhcpd.leases ]; then
awk '/lease/ { ip = $2 } /client-hostname/ { hostname = $2; gsub(/[";]/, "", hostname) } /binding state active/ { print ip " - " hostname }' /var/lib/dhcp/dhcpd.leases
elif [ -f /var/lib/dhcpcd5/dhcpcd.leases ]; then
cat /var/lib/dhcpcd5/dhcpcd.leases
else
echo "DHCP lease file not found. Checking dnsmasq leases..."
if [ -f /var/lib/dhcp/dhcpd.leases ]; then
cat /var/lib/dhcp/dhcpd.leases
else
echo "No lease information available"
echo "Try: arp -a | grep 192.168.100"
fi
fi
EOF
chmod +x /usr/local/bin/vm-ips
log "Network setup completed!"
echo ""
info "Network Configuration Summary:"
info "- Bridge: $BRIDGE_NAME with IP $BRIDGE_IP"
info "- DHCP range: 192.168.100.10 - 192.168.100.100"
info "- DNS servers: 8.8.8.8, 8.8.4.4"
info "- NAT configured for internet access"
echo ""
info "To see VM IP addresses: vm-ips"
info "To check bridge status: ip addr show $BRIDGE_NAME"
info "To see DHCP leases: cat /var/lib/dhcp/dhcpd.leases"
echo ""
warn "Note: VMs need to be restarted to get DHCP IP addresses"

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#!/bin/bash
# Ubuntu VM Management Script
# Usage: ubuntu_vm_manage.sh <command> [vm_name]
set -e
# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color
# Configuration
VM_BASE_DIR="/var/lib/vms"
VMS_SUBVOL="$VM_BASE_DIR/vms"
log() {
echo -e "${GREEN}[$(date +'%Y-%m-%d %H:%M:%S')] $1${NC}"
}
warn() {
echo -e "${YELLOW}[$(date +'%Y-%m-%d %H:%M:%S')] WARNING: $1${NC}"
}
error() {
echo -e "${RED}[$(date +'%Y-%m-%d %H:%M:%S')] ERROR: $1${NC}"
exit 1
}
info() {
echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')] INFO: $1${NC}"
}
show_usage() {
echo "Ubuntu VM Management Script"
echo ""
echo "Usage: $0 <command> [vm_name]"
echo ""
echo "Commands:"
echo " list - List all VMs and their status"
echo " status <vm_name> - Show detailed status of a specific VM"
echo " console <vm_name> - Connect to VM console (serial)"
echo " ssh <vm_name> - SSH to VM (requires network setup)"
echo " stop <vm_name> - Stop a running VM"
echo " start <vm_name> - Start a stopped VM"
echo " delete <vm_name> - Delete a VM completely"
echo " ip <vm_name> - Show VM IP address"
echo " logs <vm_name> - Show VM logs"
echo ""
echo "Examples:"
echo " $0 list"
echo " $0 status test-vm"
echo " $0 console test-vm"
echo " $0 ssh test-vm"
}
list_vms() {
log "Listing all VMs..."
echo ""
printf "%-15s %-10s %-8s %-15s %-20s\n" "VM NAME" "STATUS" "PID" "MEMORY" "STARTED"
printf "%-15s %-10s %-8s %-15s %-20s\n" "-------" "------" "---" "------" "-------"
if [ ! -d "$VMS_SUBVOL" ]; then
warn "No VMs directory found at $VMS_SUBVOL"
return
fi
for vm_dir in "$VMS_SUBVOL"/*; do
if [ -d "$vm_dir" ]; then
vm_name=$(basename "$vm_dir")
vm_info_file="$vm_dir/vm-info.txt"
if [ -f "$vm_info_file" ]; then
# Safely source the file with error handling
if source "$vm_info_file" 2>/dev/null; then
# Check if VM is running
if [ -n "$VM_PID" ] && kill -0 "$VM_PID" 2>/dev/null; then
status="${GREEN}RUNNING${NC}"
pid="$VM_PID"
else
status="${RED}STOPPED${NC}"
pid="N/A"
fi
# Handle missing or malformed STARTED field
if [ -z "$STARTED" ]; then
STARTED="Unknown"
fi
printf "%-15s %-18s %-8s %-15s %-20s\n" "$vm_name" "$(printf "%b" "$status")" "$pid" "${MEMORY_MB}MB" "$STARTED"
else
printf "%-15s %-18s %-8s %-15s %-20s\n" "$vm_name" "$(printf "%b" "${RED}ERROR${NC}")" "N/A" "N/A" "Config Error"
fi
else
printf "%-15s %-18s %-8s %-15s %-20s\n" "$vm_name" "$(printf "%b" "${YELLOW}UNKNOWN${NC}")" "N/A" "N/A" "N/A"
fi
fi
done
echo ""
}
show_vm_status() {
local vm_name="$1"
local vm_dir="$VMS_SUBVOL/$vm_name"
local vm_info_file="$vm_dir/vm-info.txt"
if [ ! -d "$vm_dir" ]; then
error "VM '$vm_name' not found"
fi
if [ ! -f "$vm_info_file" ]; then
error "VM info file not found for '$vm_name'"
fi
source "$vm_info_file"
log "VM Status for: $vm_name"
echo ""
echo "VM Name: $VM_NAME"
echo "Memory: ${MEMORY_MB}MB"
echo "CPU Cores: $CPU_CORES"
echo "Started: $STARTED"
echo "Image Path: $VM_IMAGE_PATH"
echo "Cloud-init: $CLOUD_INIT_PATH"
echo "Socket: $VM_SOCKET"
echo "TAP Interface: $TAP_NAME"
echo "Bridge: $BRIDGE_NAME"
# Check if VM is running
if [ -n "$VM_PID" ] && kill -0 "$VM_PID" 2>/dev/null; then
echo "Status: ${GREEN}RUNNING${NC} (PID: $VM_PID)"
# Show network info
if ip link show "$TAP_NAME" &>/dev/null; then
echo "Network: ${GREEN}TAP interface active${NC}"
else
echo "Network: ${RED}TAP interface not found${NC}"
fi
# Show socket info
if [ -S "$VM_SOCKET" ]; then
echo "API Socket: ${GREEN}Available${NC}"
else
echo "API Socket: ${RED}Not available${NC}"
fi
else
echo "Status: ${RED}STOPPED${NC}"
fi
echo ""
}
connect_console() {
local vm_name="$1"
local vm_dir="$VMS_SUBVOL/$vm_name"
local vm_info_file="$vm_dir/vm-info.txt"
if [ ! -f "$vm_info_file" ]; then
error "VM '$vm_name' not found"
fi
source "$vm_info_file"
if [ -z "$VM_PID" ] || ! kill -0 "$VM_PID" 2>/dev/null; then
error "VM '$vm_name' is not running"
fi
info "Connecting to console for VM '$vm_name'"
info "Press Ctrl+A then X to exit console"
echo ""
# Connect to the VM's console via the API socket
if [ -S "$VM_SOCKET" ]; then
# Use socat to connect to the console
if command -v socat &>/dev/null; then
socat - UNIX-CONNECT:"$VM_SOCKET"
else
warn "socat not found. Installing..."
apt update && apt install -y socat
socat - UNIX-CONNECT:"$VM_SOCKET"
fi
else
error "VM socket not found at $VM_SOCKET"
fi
}
ssh_to_vm() {
local vm_name="$1"
warn "SSH connection requires:"
warn "1. VM to be fully booted"
warn "2. Network bridge configured with IP"
warn "3. VM to have received IP via DHCP"
echo ""
info "To set up networking:"
info "1. Configure bridge IP: ip addr add 192.168.100.1/24 dev br0"
info "2. Enable IP forwarding: echo 1 > /proc/sys/net/ipv4/ip_forward"
info "3. Set up NAT: iptables -t nat -A POSTROUTING -s 192.168.100.0/24 -j MASQUERADE"
echo ""
info "Default login: ubuntu / ubuntu"
info "SSH command: ssh ubuntu@<vm-ip>"
}
stop_vm() {
local vm_name="$1"
local vm_dir="$VMS_SUBVOL/$vm_name"
local vm_info_file="$vm_dir/vm-info.txt"
if [ ! -f "$vm_info_file" ]; then
error "VM '$vm_name' not found"
fi
source "$vm_info_file"
if [ -z "$VM_PID" ] || ! kill -0 "$VM_PID" 2>/dev/null; then
warn "VM '$vm_name' is not running"
return
fi
log "Stopping VM '$vm_name' (PID: $VM_PID)..."
# Graceful shutdown first
kill -TERM "$VM_PID" 2>/dev/null || true
# Wait a bit for graceful shutdown
sleep 3
# Force kill if still running
if kill -0 "$VM_PID" 2>/dev/null; then
warn "Forcing shutdown..."
kill -KILL "$VM_PID" 2>/dev/null || true
fi
# Cleanup network
if [ -n "$TAP_NAME" ]; then
ip link delete "$TAP_NAME" 2>/dev/null || true
fi
# Remove socket
if [ -n "$VM_SOCKET" ]; then
rm -f "$VM_SOCKET"
fi
log "VM '$vm_name' stopped"
}
delete_vm() {
local vm_name="$1"
local vm_dir="$VMS_SUBVOL/$vm_name"
if [ ! -d "$vm_dir" ]; then
error "VM '$vm_name' not found"
fi
# Stop VM first if running
if [ -f "$vm_dir/vm-info.txt" ]; then
source "$vm_dir/vm-info.txt"
if [ -n "$VM_PID" ] && kill -0 "$VM_PID" 2>/dev/null; then
log "Stopping VM before deletion..."
stop_vm "$vm_name"
fi
fi
# Confirm deletion
echo -e "${RED}WARNING: This will permanently delete VM '$vm_name' and all its data!${NC}"
read -p "Are you sure? (yes/no): " confirm
if [ "$confirm" = "yes" ]; then
log "Deleting VM '$vm_name'..."
btrfs subvolume delete "$vm_dir"
log "VM '$vm_name' deleted successfully"
else
info "Deletion cancelled"
fi
}
start_vm() {
local vm_name="$1"
local vm_dir="$VMS_SUBVOL/$vm_name"
local vm_info_file="$vm_dir/vm-info.txt"
if [ ! -d "$vm_dir" ]; then
error "VM '$vm_name' not found"
fi
if [ ! -f "$vm_info_file" ]; then
error "VM info file not found for '$vm_name'"
fi
source "$vm_info_file"
# Check if VM is already running
if [ -n "$VM_PID" ] && kill -0 "$VM_PID" 2>/dev/null; then
warn "VM '$vm_name' is already running (PID: $VM_PID)"
return
fi
log "Starting VM '$vm_name'..."
# Create TAP interface
if ! ip link show "$TAP_NAME" &>/dev/null; then
log "Creating TAP interface $TAP_NAME..."
ip tuntap add dev "$TAP_NAME" mode tap
ip link set dev "$TAP_NAME" up
ip link set dev "$TAP_NAME" master "$BRIDGE_NAME"
fi
# Remove existing socket if it exists
rm -f "$VM_SOCKET"
# Start Cloud Hypervisor in background
cloud-hypervisor \
--api-socket "$VM_SOCKET" \
--memory "size=${MEMORY_MB}M" \
--cpus "boot=$CPU_CORES" \
--kernel "/var/lib/vms/base/hypervisor-fw" \
--disk "path=$VM_IMAGE_PATH" "path=$CLOUD_INIT_PATH,readonly=on" \
--net "tap=$TAP_NAME,mac=52:54:00:$(printf '%02x:%02x:%02x' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256)))" \
--serial tty \
--console off \
--log-file /tmp/cloud-hypervisor-$VM_NAME.log &
NEW_VM_PID=$!
# Update VM info file with new PID
sed -i "s/VM_PID=.*/VM_PID=$NEW_VM_PID/" "$vm_info_file"
log "VM '$vm_name' started with PID $NEW_VM_PID"
log "VM socket: $VM_SOCKET"
log "TAP interface: $TAP_NAME"
log "To connect to console: ./ubuntu_vm_manage.sh console $vm_name"
}
# Main script logic
if [ $# -eq 0 ]; then
show_usage
exit 1
fi
COMMAND="$1"
VM_NAME="$2"
case "$COMMAND" in
"list")
list_vms
;;
"status")
if [ -z "$VM_NAME" ]; then
error "VM name required for status command"
fi
show_vm_status "$VM_NAME"
;;
"console")
if [ -z "$VM_NAME" ]; then
error "VM name required for console command"
fi
connect_console "$VM_NAME"
;;
"ssh")
if [ -z "$VM_NAME" ]; then
error "VM name required for ssh command"
fi
ssh_to_vm "$VM_NAME"
;;
"stop")
if [ -z "$VM_NAME" ]; then
error "VM name required for stop command"
fi
stop_vm "$VM_NAME"
;;
"start")
if [ -z "$VM_NAME" ]; then
error "VM name required for start command"
fi
start_vm "$VM_NAME"
;;
"delete")
if [ -z "$VM_NAME" ]; then
error "VM name required for delete command"
fi
delete_vm "$VM_NAME"
;;
"ip"|"logs")
warn "Command '$COMMAND' not yet implemented"
;;
*)
error "Unknown command: $COMMAND"
show_usage
exit 1
;;
esac

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@ -82,10 +82,13 @@ fi
mkdir -p "$VM_BASE_DIR"
# Check if the base directory is on btrfs
if ! btrfs filesystem show "$VM_BASE_DIR" &>/dev/null; then
error "Base directory $VM_BASE_DIR is not on a btrfs filesystem. Please create a btrfs filesystem first."
FILESYSTEM_TYPE=$(stat -f -c %T "$VM_BASE_DIR" 2>/dev/null)
if [ "$FILESYSTEM_TYPE" != "btrfs" ]; then
error "Base directory $VM_BASE_DIR is not on a btrfs filesystem (detected: $FILESYSTEM_TYPE). Please create a btrfs filesystem first."
fi
log "Btrfs filesystem detected at $VM_BASE_DIR"
# Create base and vms subvolumes if they don't exist
if [ ! -d "$BASE_SUBVOL" ]; then
log "Creating base subvolume at $BASE_SUBVOL"
@ -240,12 +243,11 @@ cloud-hypervisor \
--memory "size=${MEMORY_MB}M" \
--cpus "boot=$CPU_CORES" \
--kernel "$FIRMWARE_PATH" \
--disk "path=$VM_IMAGE_PATH" \
--disk "path=$CLOUD_INIT_PATH,readonly=on" \
--disk "path=$VM_IMAGE_PATH" "path=$CLOUD_INIT_PATH,readonly=on" \
--net "tap=$TAP_NAME,mac=52:54:00:$(printf '%02x:%02x:%02x' $((RANDOM%256)) $((RANDOM%256)) $((RANDOM%256)))" \
--serial tty \
--console off \
--log-level info &
--log-file /tmp/cloud-hypervisor-$VM_NAME.log &
VM_PID=$!
@ -266,7 +268,7 @@ MEMORY_MB=$MEMORY_MB
CPU_CORES=$CPU_CORES
VM_IMAGE_PATH=$VM_IMAGE_PATH
CLOUD_INIT_PATH=$CLOUD_INIT_PATH
STARTED=$(date)
STARTED="$(date '+%Y-%m-%d %H:%M:%S')"
EOF
log "VM information saved to $VM_INFO_FILE"