104 lines
2.9 KiB
Bash
104 lines
2.9 KiB
Bash
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#!/bin/bash
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# This is a wrapper script around `docker build`. It provides a mechanism
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# for using cached image layers from upstream repositories as well as an
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# automatic push back to the docker registry.
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set -e
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script_path="$(pushd "$(dirname "$0")" >/dev/null; pwd)"
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src_path="$(pushd "${script_path}/.." >/dev/null; pwd)"
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die() { echo "$@" 1>&2 ; exit 1; }
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info() { echo "===> $*"; }
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docker_build() {
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declare name="$1"; shift
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declare path="$1"; shift
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declare args="$*"
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if [ "${DOCKER_REGISTRY}" != "" ]; then
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remote_name="${DOCKER_REGISTRY}/${name}"
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fi
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info "Building ${name} image..."
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if [ "${DOCKER_REGISTRY}" != "" ]; then
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docker_pull "${remote_name}" && docker tag "${remote_name}" "${name}" || true
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fi
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old_id=$(docker images -q "${name}")
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info "Old ${name} image id: ${old_id}"
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if [ "${DOCKERFILE}" != "" ]; then
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docker build ${args} -t "${name}" -f "${DOCKERFILE}" "${path}" || \
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die "Building ${name} image failed"
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else
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docker build ${args} -t "${name}" "${path}" || \
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die "Building ${name} image failed"
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fi
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new_id=$(docker images -q "${name}")
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info "New ${name} image id: ${new_id}"
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if [ "${DEBUG}" ] && [ "${new_id}" != "${old_id}" ]; then
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info "History for old id $old_id:"
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if [ "${old_id}" != "" ]; then
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docker history "$old_id"
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fi
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info "History for new id $new_id:"
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docker history "$new_id"
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fi
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if [ "${DOCKER_PUSH:-0}" != "0" ] && [ "${DOCKER_REGISTRY}" != "" ]; then
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docker tag "${name}" "${remote_name}"
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docker_push "${remote_name}"
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fi
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}
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# Due to https://github.com/docker/docker/issues/20316, we use
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# https://github.com/tonistiigi/buildcache to generate a cache of the layer
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# metadata for later builds.
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my_buildcache() {
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if [ "$DOCKER_REGISTRY" != "" ]; then
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docker_path="/var/lib/docker"
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# Stupid hack for our AWS nodes, which have docker data on another volume
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if [ -d "/mnt/docker" ]; then
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docker_path="/mnt/docker"
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fi
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docker pull "${DOCKER_REGISTRY}/ci/buildcache" >/dev/null && \
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docker run --rm \
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-v /var/run/docker.sock:/var/run/docker.sock \
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-v ${docker_path}:/var/lib/docker \
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"${DOCKER_REGISTRY}/ci/buildcache" "$@"
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fi
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}
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docker_pull() {
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info "Attempting to pull '$1' image from registry..."
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(
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tmpdir=$(mktemp -d)
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docker pull "$1"
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(
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# In addition, pull the cached metadata and load it (buildcache)
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cd "${tmpdir}" && docker pull "$1-cache" && docker save "$1-cache" | \
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tar -xf - && docker load -i ./*/layer.tar
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)
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rm -rf "${tmpdir}"
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) || true
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}
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docker_push() {
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info "Pushing '$1' image to registry..."
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docker push "$1"
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# Create a cache of the layer metdata we need and push it as an image
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#docker rmi $1-cache 2>/dev/null || true
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my_buildcache save -g /var/lib/docker "$1" | gunzip -c | \
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docker import - "$1-cache" && \
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docker push "$1-cache"
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}
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docker_build $@
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