Dockerfile

# Copyright 2025 Alibaba Group Holding Ltd.
# 
# 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.

# Build the manager binary
FROM golang:1.24 AS builder
ARG TARGETOS
ARG TARGETARCH

WORKDIR /workspace
# Copy the Go Modules manifests
COPY go.mod go.mod
COPY go.sum 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 GOPROXY=https://goproxy.cn,direct go mod download

# Copy the go source
COPY cmd/ cmd/
COPY apis/ apis/
COPY pkg/ pkg/
COPY internal/ internal/

# Build
# the GOARCH has not a default value to allow the binary be built according to the host where the command
# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
RUN echo "Building for $TARGETOS/$TARGETARCH"
ARG PACKAGE=cmd/controller/main.go
RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -o server ${PACKAGE}

# Use golang image as base to ensure nsenter (util-linux) is available
# distroless does not contain shell or nsenter
FROM golang:1.24
ARG USERID=65532
WORKDIR /workspace
COPY --from=builder /workspace/server .
USER $USERID
ENTRYPOINT ["/workspace/server"]