wireguard-setup/packer/qemu/start-vm.sh
Héctor Molinero Fernández 80517a35b0 Updated start-vm.sh
2020-09-29 23:12:19 +02:00

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#!/bin/sh
set -eu
export LC_ALL=C
SRC_DIR=$(dirname "$(dirname "$(readlink -f "$0")")")
TMP_DIR=$(mktemp -d)
ORIGINAL_DISK=${SRC_DIR:?}/dist/qemu/wireguard.qcow2
SNAPSHOT_DISK=${TMP_DIR:?}/snapshot.qcow2
USERDATA_YAML=${SRC_DIR:?}/qemu/http/seed/user-data
USERDATA_DISK=${TMP_DIR:?}/seed.img
# Remove temporary files on exit
trap 'rm -rf "${TMP_DIR:?}"; trap - EXIT; exit 0' EXIT TERM INT HUP
# Create a snapshot image to preserve the original image
qemu-img create -b "${ORIGINAL_DISK:?}" -f qcow2 "${SNAPSHOT_DISK:?}"
qemu-img resize "${SNAPSHOT_DISK:?}" +2G
# Create a seed image with metadata using cloud-localds
cloud-localds "${USERDATA_DISK:?}" "${USERDATA_YAML:?}"
# Remove keys from the known_hosts file
ssh-keygen -R '[127.0.0.1]:1122' 2>/dev/null
ssh-keygen -R '[localhost]:1122' 2>/dev/null
# hostfwd helper
hostfwd() { printf ',hostfwd=%s::%s-:%s' "$@"; }
# Launch VM
kvm \
-smp 1 -m 512 \
-nographic -serial mon:stdio \
-device e1000,netdev=n0 \
-netdev user,id=n0"$(hostfwd \
tcp 1122 122 \
udp 51820 51820 \
udp 1053 53 \
tcp 1443 443 \
)" \
-drive file="${SNAPSHOT_DISK:?}",if=virtio,format=qcow2 \
-drive file="${USERDATA_DISK:?}",if=virtio,format=raw