mirror of
https://github.com/kubernetes-sigs/kind.git
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66 lines
2.6 KiB
Docker
66 lines
2.6 KiB
Docker
# Copyright 2019 The Kubernetes 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 image is a haproxy image + minimal config so the container will not exit
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# while we rewrite the config at runtime and signal haproxy to reload.
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ARG BASE="registry.k8s.io/build-image/debian-base:bullseye-v1.4.3"
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FROM ${BASE} AS build
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# NOTE: copyrights.tar.gz is a quirk of Kubernetes's debian-base image
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# We extract these here so we can grab the relevant files are easily
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# staged for copying into our final image.
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RUN [ ! -f /usr/share/copyrights.tar.gz ] || tar -C / -xzvf /usr/share/copyrights.tar.gz
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# install:
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# - haproxy (see: https://haproxy.debian.net/)
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# - bash (ldd is a bash script and debian-base removes bash)
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# - procps (for `kill` which kind needs)
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RUN apt update && \
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apt install -y --no-install-recommends haproxy=2.2.\* \
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procps bash
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# copy in script for staging distro provided binary to distroless
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COPY --chmod=0755 stage-binary-and-deps.sh /usr/local/bin/
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# stage everything for copying into the final image
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# NOTE: kind currently also uses "mkdir" and "cp" to write files within the container
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# TODO: mkdir especially should be unnecessary, with a little refactoring
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# NOTE: kill is used to signal haproxy to reload
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ARG STAGE_DIR="/opt/stage"
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RUN mkdir -p "${STAGE_DIR}" && \
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stage-binary-and-deps.sh haproxy "${STAGE_DIR}" && \
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stage-binary-and-deps.sh cp "${STAGE_DIR}" && \
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stage-binary-and-deps.sh mkdir "${STAGE_DIR}" && \
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stage-binary-and-deps.sh kill "${STAGE_DIR}" && \
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find "${STAGE_DIR}"
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################################################################################
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# See: https://github.com/GoogleContainerTools/distroless/tree/main/base
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# This has /etc/passwd, tzdata, cacerts
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FROM "gcr.io/distroless/static-debian11"
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ARG STAGE_DIR="/opt/stage"
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# copy staged binary + deps + copyright
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COPY --from=build "${STAGE_DIR}/" /
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# add our minimal config
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COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg
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# below roughly matches the standard haproxy image
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STOPSIGNAL SIGUSR1
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ENTRYPOINT ["haproxy", "-W", "-db", "-f", "/usr/local/etc/haproxy/haproxy.cfg"]
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