Dockerfile

# Copyright 2023 The Cockroach Authors
#
# 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.
#
# SPDX-License-Identifier: Apache-2.0

# This Dockerfile is based on the example in
# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/
#
# The go compiler will run using the host architecture, but
# cross-compile to the desired target platform given to buildx.
FROM --platform=$BUILDPLATFORM golang:1.20 AS builder
WORKDIR /tmp/compile
ARG TARGETOS TARGETARCH
RUN --mount=target=. \
    --mount=type=cache,target=/root/.cache/go-build \
    --mount=type=cache,target=/go/pkg \
    GOOS=$TARGETOS GOARCH=$TARGETARCH CGO_ENABLED=0 go build -v -ldflags="-s -w" -o /usr/bin/cdc-sink .

# Create a single-binary docker image, including a set of core CA
# certificates so that we can call out to any external APIs.
FROM scratch
WORKDIR /data/
ENTRYPOINT ["/usr/bin/cdc-sink"]
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /usr/bin/cdc-sink /usr/bin/