56 lines
1.4 KiB
Plaintext
56 lines
1.4 KiB
Plaintext
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#!/usr/bin/env bash
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set -eo pipefail
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DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" > /dev/null && pwd )"
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ORIG_DISK_IMAGE=$1
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function usage {
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cat<<EOF
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Usage: $0 </chemin/vers/image_disque>
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Éxecute l'image disque donnée avec Qemu
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EOF
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exit 1
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}
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function find_available_port {
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read lower_port upper_port < /proc/sys/net/ipv4/ip_local_port_range
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while :; do
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for (( port = lower_port ; port <= upper_port ; port++ )); do
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(echo > /dev/tcp/0.0.0.0/$port) 2>/dev/null >/dev/null
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if [ $? -ne 0 ]; then
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echo $port
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return
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fi
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done
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done
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}
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[ -z "$ORIG_DISK_IMAGE" ] && usage
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DISK_IMAGE_DIR="$DIR/../.run/$(dirname $ORIG_DISK_IMAGE)"
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ORIG_DISK_IMAGE=$(readlink -f "$ORIG_DISK_IMAGE")
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DISK_IMAGE_NAME=$(date -r "$ORIG_DISK_IMAGE" | shasum - | cut -f1 -d ' ').img
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DISK_IMAGE="$DISK_IMAGE_DIR/$DISK_IMAGE_NAME"
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if [ -f "$DISK_IMAGE" ]; then
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echo "Using existing qcow2 image '$DISK_IMAGE'..."
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else
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mkdir -p "$(dirname $DISK_IMAGE)"
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rm -f "$DISK_IMAGE_DIR"/*.img
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cd "$(dirname $DISK_IMAGE)"
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echo "Generating qcow2 image '$DISK_IMAGE'..."
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qemu-img create -f qcow2 -b "$ORIG_DISK_IMAGE" "$(basename $DISK_IMAGE)"
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cd -
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fi
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SSH_PORT=$(find_available_port)
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echo "Starting VM... SSH will be available on '127.0.0.1:${SSH_PORT}'"
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qemu-system-x86_64 -boot once=d \
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-device virtio-net,netdev=user.0 \
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-m 1024M -machine type=pc,accel=kvm \
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-display sdl \
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-hda "${DISK_IMAGE}" \
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-netdev user,id=user.0,hostfwd=tcp::${SSH_PORT}-:22
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