wireguard-setup/packer/qemu/start-vm.sh
2020-06-19 00:12:25 +02:00

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#!/bin/sh
set -eu
export LC_ALL=C
SRC_DIR=$(dirname "$(readlink -f "$0")")
TMP_DIR=$(mktemp -d)
trap 'rm -rf "${TMP_DIR:?}"' EXIT
CLOUDIMG_DISK=${SRC_DIR:?}/dist/wireguard.qcow2
SNAPSHOT_DISK=${TMP_DIR:?}/cloudinit-snapshot.qcow2
USERDATA_DISK=${TMP_DIR:?}/cloudinit-seed.img
USERDATA_YAML=${TMP_DIR:?}/user-data
# Create a snapshot image to preserve the original cloud-image
qemu-img create -b "${CLOUDIMG_DISK:?}" -f qcow2 "${SNAPSHOT_DISK:?}"
qemu-img resize "${SNAPSHOT_DISK:?}" +2G
# Create a seed image with metadata using cloud-localds
printf '%s\n' '#cloud-config' 'runcmd: ["ssh-import-id gh:hectorm"]' > "${USERDATA_YAML:?}"
cloud-localds "${USERDATA_DISK:?}" "${USERDATA_YAML:?}"
# Remove keys from the known_hosts file
ssh-keygen -R '[127.0.0.1]:1122'
ssh-keygen -R '[localhost]:1122'
# hostfwd helper
hostfwd() { printf ',hostfwd=%s::%s-:%s' "$@"; }
# 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