Dockerfile

# Build the manager binary
FROM --platform=$BUILDPLATFORM golang:1.23-alpine3.19 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 go mod download

# Copy the go source
COPY main.go main.go
COPY api/ api/
COPY pkg/ pkg/
COPY controllers/ controllers/

# 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 CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -a -o manager main.go

# Use distroless as minimal base image to package the manager binary
# Refer to https://github.com/GoogleContainerTools/distroless for more details
FROM gcr.io/distroless/static:nonroot as production

LABEL org.opencontainers.image.source="https://github.com/k8sgpt-ai/k8sgpt-operator" \
    org.opencontainers.image.url="https://k8sgpt.ai" \
    org.opencontainers.image.title="k8sgpt" \
    org.opencontainers.image.vendor='The K8sGPT Authors' \
    org.opencontainers.image.licenses='Apache-2.0'

WORKDIR /
COPY --from=builder /workspace/manager .
USER 65532:65532

ENTRYPOINT ["/manager"]