netbox-docker/build.sh
2023-04-27 09:32:42 +02:00

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#!/bin/bash
# Clones the NetBox repository with git from Github and builds the Dockerfile
echo "▶️ $0 $*"
set -e
if [ "${1}x" == "x" ] || [ "${1}" == "--help" ] || [ "${1}" == "-h" ]; then
_BOLD=$(tput bold)
_GREEN=$(tput setaf 2)
_CYAN=$(tput setaf 6)
_CLEAR=$(tput sgr0)
cat <<END_OF_HELP
${_BOLD}Usage:${_CLEAR} ${0} <branch> [--push]
branch The branch or tag to build. Required.
--push Pushes the built container image to the registry.
${_BOLD}You can use the following ENV variables to customize the build:${_CLEAR}
SRC_ORG Which fork of netbox to use (i.e. github.com/\${SRC_ORG}/\${SRC_REPO}).
${_GREEN}Default:${_CLEAR} netbox-community
SRC_REPO The name of the repository to use (i.e. github.com/\${SRC_ORG}/\${SRC_REPO}).
${_GREEN}Default:${_CLEAR} netbox
URL Where to fetch the code from.
Must be a git repository. Can be private.
${_GREEN}Default:${_CLEAR} https://github.com/\${SRC_ORG}/\${SRC_REPO}.git
NETBOX_PATH The path where netbox will be checkout out.
Must not be outside of the netbox-docker repository (because of Docker)!
${_GREEN}Default:${_CLEAR} .netbox
SKIP_GIT If defined, git is not invoked and \${NETBOX_PATH} will not be altered.
This may be useful, if you are manually managing the NETBOX_PATH.
${_GREEN}Default:${_CLEAR} undefined
TAG The version part of the image tag.
${_GREEN}Default:${_CLEAR}
When <branch>=master: latest
When <branch>=develop: snapshot
Else: same as <branch>
IMAGE_NAMES The names used for the image including the registry
Used for tagging the image.
${_GREEN}Default:${_CLEAR} docker.io/netboxcommunity/netbox
${_CYAN}Example:${_CLEAR} 'docker.io/netboxcommunity/netbox quay.io/netboxcommunity/netbox'
DOCKER_TAG The name of the tag which is applied to the image.
Useful for pushing into another registry than hub.docker.com.
${_GREEN}Default:${_CLEAR} \${DOCKER_REGISTRY}/\${DOCKER_ORG}/\${DOCKER_REPO}:\${TAG}
DOCKER_SHORT_TAG The name of the short tag which is applied to the
image. This is used to tag all patch releases to their
containing version e.g. v2.5.1 -> v2.5
${_GREEN}Default:${_CLEAR} \${DOCKER_REGISTRY}/\${DOCKER_ORG}/\${DOCKER_REPO}:<MAJOR>.<MINOR>
DOCKERFILE The name of Dockerfile to use.
${_GREEN}Default:${_CLEAR} Dockerfile
DOCKER_FROM The base image to use.
${_GREEN}Default:${_CLEAR} 'ubuntu:22.04'
BUILDX_PLATFORMS
Specifies the platform(s) to build the image for.
${_CYAN}Example:${_CLEAR} 'linux/amd64,linux/arm64'
${_GREEN}Default:${_CLEAR} 'linux/amd64'
BUILDX_BUILDER_NAME
If defined, the image build will be assigned to the given builder.
If you specify this variable, make sure that the builder exists.
If this value is not defined, a new builx builder with the directory name of the
current directory (i.e. '$(basename "${PWD}")') is created."
${_CYAN}Example:${_CLEAR} 'clever_lovelace'
${_GREEN}Default:${_CLEAR} undefined
BUILDX_REMOVE_BUILDER
If defined (and only if BUILDX_BUILDER_NAME is undefined),
then the buildx builder created by this script will be removed after use.
This is useful if you build NetBox Docker on an automated system that does
not manage the builders for you.
${_CYAN}Example:${_CLEAR} 'on'
${_GREEN}Default:${_CLEAR} undefined
HTTP_PROXY The proxy to use for http requests.
${_CYAN}Example:${_CLEAR} http://proxy.domain.tld:3128
${_GREEN}Default:${_CLEAR} undefined
NO_PROXY Comma-separated list of domain extensions proxy should not be used for.
${_CYAN}Example:${_CLEAR} .domain1.tld,.domain2.tld
${_GREEN}Default:${_CLEAR} undefined
DEBUG If defined, the script does not stop when certain checks are unsatisfied.
${_GREEN}Default:${_CLEAR} undefined
DRY_RUN Prints all build statements instead of running them.
${_GREEN}Default:${_CLEAR} undefined
GH_ACTION If defined, special 'echo' statements are enabled that set the
following environment variables in Github Actions:
- FINAL_DOCKER_TAG: The final value of the DOCKER_TAG env variable
${_GREEN}Default:${_CLEAR} undefined
${_BOLD}Examples:${_CLEAR}
${0} master
This will fetch the latest 'master' branch, build a Docker Image and tag it
'netboxcommunity/netbox:latest'.
${0} develop
This will fetch the latest 'develop' branch, build a Docker Image and tag it
'netboxcommunity/netbox:snapshot'.
${0} v2.6.6
This will fetch the 'v2.6.6' tag, build a Docker Image and tag it
'netboxcommunity/netbox:v2.6.6' and 'netboxcommunity/netbox:v2.6'.
${0} develop-2.7
This will fetch the 'develop-2.7' branch, build a Docker Image and tag it
'netboxcommunity/netbox:develop-2.7'.
SRC_ORG=cimnine ${0} feature-x
This will fetch the 'feature-x' branch from https://github.com/cimnine/netbox.git,
build a Docker Image and tag it 'netboxcommunity/netbox:feature-x'.
SRC_ORG=cimnine DOCKER_ORG=cimnine ${0} feature-x
This will fetch the 'feature-x' branch from https://github.com/cimnine/netbox.git,
build a Docker Image and tag it 'cimnine/netbox:feature-x'.
END_OF_HELP
if [ "${1}x" == "x" ]; then
exit 1
else
exit 0
fi
fi
# Check if we have everything needed for the build
source ./build-functions/check-commands.sh
# Load all build functions
source ./build-functions/get-public-image-config.sh
source ./build-functions/gh-functions.sh
IMAGE_NAMES="${IMAGE_NAMES-docker.io/netboxcommunity/netbox}"
IFS=' ' read -ra IMAGE_NAMES <<<"${IMAGE_NAMES}"
###
# Enabling dry-run mode
###
if [ -z "${DRY_RUN}" ]; then
DRY=""
else
echo "⚠️ DRY_RUN MODE ON ⚠️"
DRY="echo"
fi
gh_echo "::group::⤵️ Fetching the NetBox source code"
###
# Variables for fetching the NetBox source
###
SRC_ORG="${SRC_ORG-netbox-community}"
SRC_REPO="${SRC_REPO-netbox}"
NETBOX_BRANCH="${1}"
URL="${URL-https://github.com/${SRC_ORG}/${SRC_REPO}.git}"
NETBOX_PATH="${NETBOX_PATH-.netbox}"
###
# Fetching the NetBox source
###
if [ "${2}" != "--push-only" ] && [ -z "${SKIP_GIT}" ]; then
REMOTE_EXISTS=$(git ls-remote --heads --tags "${URL}" "${NETBOX_BRANCH}" | wc -l)
if [ "${REMOTE_EXISTS}" == "0" ]; then
echo "❌ Remote branch '${NETBOX_BRANCH}' not found in '${URL}'; Nothing to do"
gh_out "skipped=true"
exit 0
fi
echo "🌐 Checking out '${NETBOX_BRANCH}' of NetBox from the url '${URL}' into '${NETBOX_PATH}'"
if [ ! -d "${NETBOX_PATH}" ]; then
$DRY git clone -q --depth 10 -b "${NETBOX_BRANCH}" "${URL}" "${NETBOX_PATH}"
fi
(
$DRY cd "${NETBOX_PATH}"
# shellcheck disable=SC2030
if [ -n "${HTTP_PROXY}" ]; then
git config http.proxy "${HTTP_PROXY}"
fi
$DRY git remote set-url origin "${URL}"
$DRY git fetch -qp --depth 10 origin "${NETBOX_BRANCH}"
$DRY git checkout -qf FETCH_HEAD
$DRY git prune
)
echo "✅ Checked out NetBox"
fi
gh_echo "::endgroup::"
gh_echo "::group::🧮 Calculating Values"
###
# Determining the value for DOCKERFILE
# and checking whether it exists
###
DOCKERFILE="${DOCKERFILE-Dockerfile}"
if [ ! -f "${DOCKERFILE}" ]; then
echo "🚨 The Dockerfile ${DOCKERFILE} doesn't exist."
if [ -z "${DEBUG}" ]; then
exit 1
else
echo "⚠️ Would exit here with code '1', but DEBUG is enabled."
fi
fi
###
# Determining the value for DOCKER_FROM
###
if [ -z "$DOCKER_FROM" ]; then
DOCKER_FROM="docker.io/ubuntu:22.04"
fi
###
# Variables for labelling the docker image
###
BUILD_DATE="$(date -u '+%Y-%m-%dT%H:%M+00:00')"
if [ -d ".git" ] && [ -z "${SKIP_GIT}" ]; then
GIT_REF="$(git rev-parse HEAD)"
fi
# Read the project version from the `VERSION` file and trim it, see https://stackoverflow.com/a/3232433/172132
PROJECT_VERSION="${PROJECT_VERSION-$(sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' VERSION)}"
# Get the Git information from the netbox directory
if [ -d "${NETBOX_PATH}/.git" ] && [ -z "${SKIP_GIT}" ]; then
NETBOX_GIT_REF=$(
cd "${NETBOX_PATH}"
git rev-parse HEAD
)
NETBOX_GIT_BRANCH=$(
cd "${NETBOX_PATH}"
git rev-parse --abbrev-ref HEAD
)
NETBOX_GIT_URL=$(
cd "${NETBOX_PATH}"
git remote get-url origin
)
fi
###
# Variables for tagging the docker image
###
DOCKER_REGISTRY="${DOCKER_REGISTRY-docker.io}"
DOCKER_ORG="${DOCKER_ORG-netboxcommunity}"
DOCKER_REPO="${DOCKER_REPO-netbox}"
case "${NETBOX_BRANCH}" in
master)
TAG="${TAG-latest}"
;;
develop)
TAG="${TAG-snapshot}"
;;
*)
TAG="${TAG-$NETBOX_BRANCH}"
;;
esac
###
# composing the final TARGET_DOCKER_TAG
###
TARGET_DOCKER_TAG="${DOCKER_TAG-${TAG}}"
TARGET_DOCKER_TAG_PROJECT="${TARGET_DOCKER_TAG}-${PROJECT_VERSION}"
###
# composing the additional DOCKER_SHORT_TAG,
# i.e. "v2.6.1" becomes "v2.6",
# which is only relevant for version tags
# Also let "latest" follow the highest version
###
if [[ "${TAG}" =~ ^v([0-9]+)\.([0-9]+)\.[0-9]+$ ]]; then
MAJOR=${BASH_REMATCH[1]}
MINOR=${BASH_REMATCH[2]}
TARGET_DOCKER_SHORT_TAG="${DOCKER_SHORT_TAG-v${MAJOR}.${MINOR}}"
TARGET_DOCKER_LATEST_TAG="latest"
TARGET_DOCKER_SHORT_TAG_PROJECT="${TARGET_DOCKER_SHORT_TAG}-${PROJECT_VERSION}"
TARGET_DOCKER_LATEST_TAG_PROJECT="${TARGET_DOCKER_LATEST_TAG}-${PROJECT_VERSION}"
fi
IMAGE_NAME_TAGS=()
for IMAGE_NAME in "${IMAGE_NAMES[@]}"; do
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_TAG}")
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_TAG_PROJECT}")
done
if [ -n "${TARGET_DOCKER_SHORT_TAG}" ]; then
for IMAGE_NAME in "${IMAGE_NAMES[@]}"; do
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_SHORT_TAG}")
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_SHORT_TAG_PROJECT}")
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_LATEST_TAG}")
IMAGE_NAME_TAGS+=("${IMAGE_NAME}:${TARGET_DOCKER_LATEST_TAG_PROJECT}")
done
fi
FINAL_DOCKER_TAG="${IMAGE_NAME_TAGS[0]}"
gh_env "FINAL_DOCKER_TAG=${IMAGE_NAME_TAGS[0]}"
###
# Checking if the build is necessary,
# meaning build only if one of those values changed:
# - a new tag is beeing created
# - base image digest
# - netbox git ref (Label: netbox.git-ref)
# - netbox-docker git ref (Label: org.opencontainers.image.revision)
###
# Load information from registry (only for first registry in "IMAGE_NAMES")
SHOULD_BUILD="false"
BUILD_REASON=""
if [ -z "${GH_ACTION}" ]; then
# Asuming non Github builds should always proceed
SHOULD_BUILD="true"
BUILD_REASON="${BUILD_REASON} interactive"
elif [ "false" == "$(check_if_tags_exists "${IMAGE_NAMES[0]}" "$TARGET_DOCKER_TAG")" ]; then
SHOULD_BUILD="true"
BUILD_REASON="${BUILD_REASON} newtag"
else
echo "Checking labels for '${FINAL_DOCKER_TAG}'"
BASE_LAST_LAYER=$(get_image_last_layer "${DOCKER_FROM}")
OLD_BASE_LAST_LAYER=$(get_image_label netbox.last-base-image-layer "${FINAL_DOCKER_TAG}")
NETBOX_GIT_REF_OLD=$(get_image_label netbox.git-ref "${FINAL_DOCKER_TAG}")
GIT_REF_OLD=$(get_image_label org.opencontainers.image.revision "${FINAL_DOCKER_TAG}")
if [ "${BASE_LAST_LAYER}" != "${OLD_BASE_LAST_LAYER}" ]; then
SHOULD_BUILD="true"
BUILD_REASON="${BUILD_REASON} ubuntu"
fi
if [ "${NETBOX_GIT_REF}" != "${NETBOX_GIT_REF_OLD}" ]; then
SHOULD_BUILD="true"
BUILD_REASON="${BUILD_REASON} netbox"
fi
if [ "${GIT_REF}" != "${GIT_REF_OLD}" ]; then
SHOULD_BUILD="true"
BUILD_REASON="${BUILD_REASON} netbox-docker"
fi
fi
if [ "${SHOULD_BUILD}" != "true" ]; then
echo "Build skipped because sources didn't change"
gh_out "skipped=true"
exit 0 # Nothing to do -> exit
else
gh_out "skipped=false"
fi
gh_echo "::endgroup::"
###
# Build the image
###
gh_echo "::group::🏗 Building the image"
###
# Composing all arguments for `docker build`
###
DOCKER_BUILD_ARGS=(
--pull
--target main
-f "${DOCKERFILE}"
)
for IMAGE_NAME in "${IMAGE_NAME_TAGS[@]}"; do
DOCKER_BUILD_ARGS+=(-t "${IMAGE_NAME}")
done
# --label
DOCKER_BUILD_ARGS+=(
--label "netbox.original-tag=${TARGET_DOCKER_TAG_PROJECT}"
--label "org.opencontainers.image.created=${BUILD_DATE}"
--label "org.opencontainers.image.version=${PROJECT_VERSION}"
)
if [ -d ".git" ] && [ -z "${SKIP_GIT}" ]; then
DOCKER_BUILD_ARGS+=(
--label "org.opencontainers.image.revision=${GIT_REF}"
)
fi
if [ -d "${NETBOX_PATH}/.git" ] && [ -z "${SKIP_GIT}" ]; then
DOCKER_BUILD_ARGS+=(
--label "netbox.git-branch=${NETBOX_GIT_BRANCH}"
--label "netbox.git-ref=${NETBOX_GIT_REF}"
--label "netbox.git-url=${NETBOX_GIT_URL}"
)
fi
if [ -n "${BUILD_REASON}" ]; then
BUILD_REASON=$(sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' <<<"$BUILD_REASON")
DOCKER_BUILD_ARGS+=(--label "netbox.build-reason=${BUILD_REASON}")
DOCKER_BUILD_ARGS+=(--label "netbox.last-base-image-layer=${BASE_LAST_LAYER}")
fi
# --build-arg
DOCKER_BUILD_ARGS+=(--build-arg "NETBOX_PATH=${NETBOX_PATH}")
if [ -n "${DOCKER_FROM}" ]; then
DOCKER_BUILD_ARGS+=(--build-arg "FROM=${DOCKER_FROM}")
fi
# shellcheck disable=SC2031
if [ -n "${HTTP_PROXY}" ]; then
DOCKER_BUILD_ARGS+=(--build-arg "http_proxy=${HTTP_PROXY}")
DOCKER_BUILD_ARGS+=(--build-arg "https_proxy=${HTTPS_PROXY}")
fi
if [ -n "${NO_PROXY}" ]; then
DOCKER_BUILD_ARGS+=(--build-arg "no_proxy=${NO_PROXY}")
fi
DOCKER_BUILD_ARGS+=(--platform "${BUILDX_PLATFORM-linux/amd64}")
if [ "${2}" == "--push" ]; then
# output type=docker does not work with pushing
DOCKER_BUILD_ARGS+=(
--output=type=image
--push
)
else
DOCKER_BUILD_ARGS+=(
--output=type=docker
)
fi
###
# Building the docker image
###
if [ -z "${BUILDX_BUILDER_NAME}" ]; then
BUILDX_BUILDER_NAME="$(basename "${PWD}")"
fi
if ! docker buildx ls | grep --quiet --word-regexp "${BUILDX_BUILDER_NAME}"; then
echo "👷 Creating new Buildx Builder '${BUILDX_BUILDER_NAME}'"
$DRY docker buildx create --name "${BUILDX_BUILDER_NAME}"
BUILDX_BUILDER_CREATED="yes"
fi
echo "🐳 Building the Docker image '${TARGET_DOCKER_TAG_PROJECT}'."
echo " Build reason set to: ${BUILD_REASON}"
$DRY docker buildx \
--builder "${BUILDX_BUILDER_NAME}" \
build \
"${DOCKER_BUILD_ARGS[@]}" \
.
echo "✅ Finished building the Docker images"
gh_echo "::endgroup::" # End group for Build
gh_echo "::group::🏗 Image Labels"
echo "🔎 Inspecting labels on '${IMAGE_NAME_TAGS[0]}'"
$DRY docker inspect "${IMAGE_NAME_TAGS[0]}" --format "{{json .Config.Labels}}" | jq
gh_echo "::endgroup::"
gh_echo "::group::🏗 Clean up"
if [ -n "${BUILDX_REMOVE_BUILDER}" ] && [ "${BUILDX_BUILDER_CREATED}" == "yes" ]; then
echo "👷 Removing Buildx Builder '${BUILDX_BUILDER_NAME}'"
$DRY docker buildx rm "${BUILDX_BUILDER_NAME}"
fi
gh_echo "::endgroup::"