177 lines
6.8 KiB
Bash
177 lines
6.8 KiB
Bash
#!/usr/bin/env bash
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# ───────────────────────────────────────────────────────────
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# run-qemu.sh — Launch the Ansible Control Node VM
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#
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# Boots the minimal Alpine Linux VM with:
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# • Machine: pc-q35-10.0
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# • TTY: ttyS0, xterm-256color (serial console)
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# • Keyboard: PS/2 (atkbd via QEMU default)
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# • Network: user-mode NAT with port forwards:
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# localhost:2222 → VM:22 (SSH)
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# localhost:8080 → VM:8080 (custom services)
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# • Disk: virtio-blk, read from output/
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# • Init: OpenRC (no systemd)
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#
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# Usage:
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# ./scripts/run-qemu.sh # serial console (default)
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# ./scripts/run-qemu.sh --gui # graphical (GTK) window
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# ./scripts/run-qemu.sh --vnc :0 # VNC on display :0
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# ./scripts/run-qemu.sh --debug # verbose kernel boot
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#
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# Environment:
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# QEMU_MEMORY — RAM size (default: 1024M)
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# QEMU_SMP — CPU count (default: 2)
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# SSH_PORT — host port for SSH forward (default: 2222)
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#
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# Access the VM:
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# ssh -p 2222 ansible@localhost # password: ansible
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# ssh -p 2222 root@localhost # password: ansible
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#
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# Stop the VM:
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# Press Ctrl-A then X (in -nographic mode)
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# Or: sudo shutdown -h now (inside VM)
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# ───────────────────────────────────────────────────────────
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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OUTPUT_DIR="${OUTPUT_DIR:-$SCRIPT_DIR/../output}"
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# ── Configuration (env-overridable) ─────────────────────────
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QEMU_BIN="${QEMU_BIN:-qemu-system-x86_64}"
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QEMU_MACHINE="${QEMU_MACHINE:-pc-q35-10.0}"
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QEMU_MEMORY="${QEMU_MEMORY:-1024M}"
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QEMU_SMP="${QEMU_SMP:-2}"
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SSH_PORT="${SSH_PORT:-2222}"
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EXTRA_PORT="${EXTRA_PORT:-8090}"
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# ── Colour helpers ──────────────────────────────────────────
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RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[1;33m'
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BLUE='\033[0;34m'; BOLD='\033[1m'; NC='\033[0m'
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info() { echo -e "${BLUE}[*]${NC} $*"; }
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ok() { echo -e "${GREEN}[✓]${NC} $*"; }
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warn() { echo -e "${YELLOW}[!]${NC} $*"; }
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# ── Find build artifacts ────────────────────────────────────
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# Prefer qcow2 over raw
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if [ -f "$OUTPUT_DIR/ansible-node.qcow2" ]; then
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DISK="$OUTPUT_DIR/ansible-node.qcow2"
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DISK_FMT="qcow2"
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elif [ -f "$OUTPUT_DIR/ansible-node.raw" ]; then
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DISK="$OUTPUT_DIR/ansible-node.raw"
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DISK_FMT="raw"
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else
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echo -e "${RED}[✗]${NC} No disk image found in ${OUTPUT_DIR}"
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echo " Run ./scripts/build-qemu.sh first."
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exit 1
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fi
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KERNEL="$OUTPUT_DIR/vmlinuz-virt"
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INITRD="$OUTPUT_DIR/initramfs-virt"
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for f in "$DISK" "$KERNEL" "$INITRD"; do
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if [ ! -f "$f" ]; then
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echo -e "${RED}[✗]${NC} Missing: $f"
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exit 1
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fi
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done
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# ── Parse arguments ─────────────────────────────────────────
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DISPLAY_MODE="nographic"
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KERNEL_APPEND="root=/dev/vda console=ttyS0 TERM=xterm-256color quiet modules=virtio_blk,ext4 rootflags=rw"
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EXTRA_QEMU_ARGS=()
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--gui|-g)
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DISPLAY_MODE="gtk"
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;;
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--vnc)
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DISPLAY_MODE="vnc"
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VNC_DISPLAY="${2:-:0}"
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shift
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;;
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--debug)
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# Remove 'quiet', add verbose/delay for debugging
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KERNEL_APPEND="${KERNEL_APPEND// quiet/} debug_init rootdelay=3"
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;;
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--help|-h)
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echo "Usage: $0 [--gui|--vnc :N|--debug] [extra qemu args...]"
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echo ""
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echo "Modes:"
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echo " (default) Serial console (-nographic), Ctrl-A X to exit"
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echo " --gui Graphical GTK window with keyboard support"
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echo " --vnc :N VNC server on display N"
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echo " --debug Verbose kernel boot messages"
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echo ""
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echo "Environment:"
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echo " QEMU_MEMORY=1024M RAM size"
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echo " QEMU_SMP=2 CPU count"
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echo " SSH_PORT=2222 Host SSH port"
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exit 0
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;;
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*)
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EXTRA_QEMU_ARGS+=("$1")
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;;
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esac
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shift
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done
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# ── Display mode flags ──────────────────────────────────────
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case "$DISPLAY_MODE" in
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nographic)
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DISPLAY_FLAG="-nographic"
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;;
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gtk)
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DISPLAY_FLAG="-display gtk"
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# QEMU's GTK display includes keyboard support via PS/2 emulation
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# which covers the CONFIG_KEYBOARD_ATKBD kernel requirement
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;;
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vnc)
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DISPLAY_FLAG="-vnc ${VNC_DISPLAY} -vga virtio"
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KERNEL_APPEND="$KERNEL_APPEND video=1024x768"
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;;
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esac
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# ── Launch ──────────────────────────────────────────────────
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echo ""
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echo -e "${BOLD}══════════════════════════════════════════════${NC}"
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echo -e "${BOLD} Ansible Control Node${NC}"
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echo -e "${BOLD}══════════════════════════════════════════════${NC}"
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echo ""
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echo -e " Machine: ${GREEN}${QEMU_MACHINE}${NC}"
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echo -e " Memory: ${GREEN}${QEMU_MEMORY}${NC}"
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echo -e " CPUs: ${GREEN}${QEMU_SMP}${NC}"
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echo -e " Disk: ${GREEN}${DISK_FMT}:${DISK}${NC}"
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echo -e " Display: ${GREEN}${DISPLAY_MODE}${NC}"
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echo -e " Kernel: ${KERNEL_APPEND}"
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echo ""
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echo -e " SSH: ${YELLOW}ssh -p ${SSH_PORT} ansible@localhost${NC}"
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echo -e " Password: ${YELLOW}ansible${NC}"
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echo ""
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echo -e " ${BOLD}Ctrl-A X${NC} to quit (serial mode)"
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echo -e " ${BOLD}Ctrl-C${NC} to force-quit (any mode)"
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echo ""
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# Build netdev string, skipping extra port if already in use
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NETDEV_FORWARDS="hostfwd=tcp::${SSH_PORT}-:22"
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if ! ss -tlnp 2>/dev/null | grep -q ":${EXTRA_PORT} "; then
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NETDEV_FORWARDS="${NETDEV_FORWARDS},hostfwd=tcp::${EXTRA_PORT}-:8080"
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else
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warn "Port ${EXTRA_PORT} already in use — skipping extra forward"
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fi
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# shellcheck disable=SC2086
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exec "$QEMU_BIN" \
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-machine "$QEMU_MACHINE" \
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-m "$QEMU_MEMORY" \
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-smp "$QEMU_SMP" \
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-enable-kvm \
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-kernel "$KERNEL" \
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-initrd "$INITRD" \
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-append "$KERNEL_APPEND" \
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-drive "file=$DISK,if=virtio,format=$DISK_FMT" \
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-netdev "user,id=net0,${NETDEV_FORWARDS}" \
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-device virtio-net,netdev=net0 \
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$DISPLAY_FLAG \
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"${EXTRA_QEMU_ARGS[@]}"
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