102 lines
3.5 KiB
Bash
102 lines
3.5 KiB
Bash
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#!/bin/bash
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# Copyright 2019 The gVisor Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This script is responsible for building a new GCP image that: 1) has nested
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# virtualization enabled, and 2) has been completely set up with the
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# image_setup.sh script. This script should be idempotent, as we memoize the
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# setup script with a hash and check for that name.
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set -xeou pipefail
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# Parameters.
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declare -r USERNAME=${USERNAME:-test}
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declare -r IMAGE_PROJECT=${IMAGE_PROJECT:-ubuntu-os-cloud}
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declare -r IMAGE_FAMILY=${IMAGE_FAMILY:-ubuntu-1604-lts}
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declare -r ZONE=${ZONE:-us-central1-f}
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# Random names.
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declare -r DISK_NAME=$(mktemp -u disk-XXXXXX | tr A-Z a-z)
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declare -r SNAPSHOT_NAME=$(mktemp -u snapshot-XXXXXX | tr A-Z a-z)
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declare -r INSTANCE_NAME=$(mktemp -u build-XXXXXX | tr A-Z a-z)
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# Hash inputs in order to memoize the produced image.
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declare -r SETUP_HASH=$( (echo ${USERNAME} ${IMAGE_PROJECT} ${IMAGE_FAMILY} && cat "$@") | sha256sum - | cut -d' ' -f1 | cut -c 1-16)
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declare -r IMAGE_NAME=${IMAGE_FAMILY:-image-}${SETUP_HASH}
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# Does the image already exist? Skip the build.
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declare -r existing=$(gcloud compute images list --filter="name=(${IMAGE_NAME})" --format="value(name)")
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if ! [[ -z "${existing}" ]]; then
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echo "${existing}"
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exit 0
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fi
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# gcloud has path errors; is this a result of being a genrule?
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export PATH=${PATH:-/bin:/usr/bin:/usr/local/bin}
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# Start a unique instance. Note that this instance will have a unique persistent
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# disk as it's boot disk with the same name as the instance.
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gcloud compute instances create \
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--quiet \
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--image-project "${IMAGE_PROJECT}" \
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--image-family "${IMAGE_FAMILY}" \
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--boot-disk-size "200GB" \
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--zone "${ZONE}" \
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"${INSTANCE_NAME}" >/dev/null
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function cleanup {
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gcloud compute instances delete --quiet --zone "${ZONE}" "${INSTANCE_NAME}"
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}
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trap cleanup EXIT
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# Wait for the instance to become available (up to 5 minutes).
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declare timeout=300
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declare success=0
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declare -r start=$(date +%s)
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declare -r end=$((${start}+${timeout}))
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while [[ "$(date +%s)" -lt "${end}" ]] && [[ "${success}" -lt 3 ]]; do
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if gcloud compute ssh --zone "${ZONE}" "${USERNAME}"@"${INSTANCE_NAME}" -- env - true 2>/dev/null; then
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success=$((${success}+1))
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fi
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done
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if [[ "${success}" -eq "0" ]]; then
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echo "connect timed out after ${timeout} seconds."
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exit 1
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fi
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# Run the install scripts provided.
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for arg; do
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gcloud compute ssh --zone "${ZONE}" "${USERNAME}"@"${INSTANCE_NAME}" -- sudo bash - <"${arg}" >/dev/null
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done
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# Stop the instance; required before creating an image.
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gcloud compute instances stop --quiet --zone "${ZONE}" "${INSTANCE_NAME}" >/dev/null
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# Create a snapshot of the instance disk.
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gcloud compute disks snapshot \
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--quiet \
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--zone "${ZONE}" \
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--snapshot-names="${SNAPSHOT_NAME}" \
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"${INSTANCE_NAME}" >/dev/null
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# Create the disk image.
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gcloud compute images create \
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--quiet \
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--source-snapshot="${SNAPSHOT_NAME}" \
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--licenses="https://www.googleapis.com/compute/v1/projects/vm-options/global/licenses/enable-vmx" \
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"${IMAGE_NAME}" >/dev/null
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# Finish up.
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echo "${IMAGE_NAME}"
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