kaniko/deploy/Dockerfile_slim

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# Copyright 2020 Google, Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Builds the static Go image to execute in a Kubernetes job
FROM golang:1.20
# This arg is passed by docker buildx & contains the target CPU architecture (e.g., amd64, arm64, etc.)
ARG TARGETARCH
WORKDIR /src
COPY . .
RUN \
--mount=type=cache,target=/root/.cache/go-build \
--mount=type=cache,target=/go/pkg \
make GOARCH=$TARGETARCH
# Generate latest ca-certificates
FROM debian:bullseye-slim AS certs
RUN apt update && apt install -y ca-certificates
FROM scratch
# Create kaniko directory with world write permission to allow non root run
# use musl busybox since it's staticly compiled
RUN --mount=from=busybox:musl,dst=/usr/ ["busybox", "sh", "-c", "mkdir -p /kaniko && chmod 777 /kaniko"]
COPY --from=0 /src/out/executor /kaniko/executor
COPY files/nsswitch.conf /etc/nsswitch.conf
COPY --from=certs /etc/ssl/certs/ca-certificates.crt /kaniko/ssl/certs/
ENV HOME /root
ENV USER root
ENV PATH /usr/local/bin:/kaniko
ENV SSL_CERT_DIR=/kaniko/ssl/certs
ENTRYPOINT ["/kaniko/executor"]