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Dockerfile
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# Copyright 2021 The Kubernetes 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.
# Support FROM override
ARG BUILD_IMAGE=docker.io/golang:1.22.6@sha256:d5e49f92b9566b0ddfc59a0d9d85cd8a848e88c8dc40d97e29f306f07c3f8338
ARG BASE_IMAGE=gcr.io/distroless/static:nonroot@sha256:9ecc53c269509f63c69a266168e4a687c7eb8c0cfd753bd8bfcaa4f58a90876f
# Build the manager binary on golang image
FROM $BUILD_IMAGE as builder
WORKDIR /workspace
# Run this with docker build --build_arg $(go env GOPROXY) to override the goproxy
ARG goproxy=https://proxy.golang.org
ENV GOPROXY=$goproxy
# Copy the Go Modules manifests
COPY go.mod go.mod
COPY api/go.mod api/go.mod
COPY test/go.mod test/go.mod
COPY go.sum go.sum
COPY api/go.sum api/go.sum
COPY test/go.sum test/go.sum
# Cache deps before building and copying source so that we don't need to re-download as much
# and so that source changes don't invalidate our downloaded layer
RUN go mod download
# Copy the sources
COPY main.go main.go
COPY api/ api/
COPY baremetal/ baremetal/
COPY controllers/ controllers/
# Build
ARG ARCH
RUN CGO_ENABLED=0 GOOS=linux GOARCH=${ARCH} \
go build -a -ldflags '-extldflags "-static"' \
-o manager .
# Copy the controller-manager into a thin image
FROM $BASE_IMAGE
WORKDIR /
COPY --from=builder /workspace/manager .
# Use uid of nonroot user (65532) because kubernetes expects numeric user when applying pod security policies
USER 65532
ENTRYPOINT ["/manager"]