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Dockerfile
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# Build the manager binary
FROM europe-docker.pkg.dev/kyma-project/prod/external/library/golang:1.23.2-alpine3.20 AS builder
ARG TARGETOS
ARG TARGETARCH
WORKDIR /app
# 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 cmd/main.go cmd/main.go
COPY api/ api/
COPY internal/controller/ internal/controller/
COPY pkg/ pkg/
COPY resources/nats resources/nats
# 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=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/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
LABEL source = [email protected]:kyma-project/nats-manager.git
WORKDIR /
COPY --from=builder /app/manager .
COPY --from=builder /app/resources/nats resources/nats
USER nonroot:nonroot
ENTRYPOINT ["/manager"]