Dockerfile

####################################################################################################
# Builder image
# Initial stage which pulls prepares build dependencies and CLI tooling we need for our final image
# Also used as the image in CI jobs so needs all dependencies
####################################################################################################
FROM golang:1.13.1 as builder

RUN apt-get update && apt-get install -y \
    git \
    make \
    wget \
    gcc \
    zip \
    ca-certificates && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

# Install docker
ENV DOCKER_VERSION=18.06.0
RUN curl -O https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VERSION}-ce.tgz && \
  tar -xzf docker-${DOCKER_VERSION}-ce.tgz && \
  mv docker/docker /usr/local/bin/docker && \
  rm -rf ./docker

# Install golangci-lint
RUN wget https://install.goreleaser.com/github.com/golangci/golangci-lint.sh  && \
    chmod +x ./golangci-lint.sh && \
    ./golangci-lint.sh -b $GOPATH/bin && \
    golangci-lint linters

COPY .golangci.yml ${GOPATH}/src/dummy/.golangci.yml

RUN cd ${GOPATH}/src/dummy && \
    touch dummy.go \
    golangci-lint run

####################################################################################################
# Rollout Controller Build stage which performs the actual build of argo-rollouts binaries
####################################################################################################
FROM golang:1.13.1 as argo-rollouts-build


WORKDIR /go/src/github.com/argoproj/argo-rollouts
# Copy only go.mod and go.sum files. This way on subsequent docker builds if the
# dependencies didn't change it won't re-download the dependencies for nothing.
COPY go.mod go.sum ./
RUN go mod download
# Perform the build
COPY . .
ARG MAKE_TARGET="controller plugin-linux plugin-darwin"
RUN make ${MAKE_TARGET}


####################################################################################################
# Final image
####################################################################################################
FROM scratch

COPY --from=argo-rollouts-build /go/src/github.com/argoproj/argo-rollouts/dist/rollouts-controller /bin/
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

# Use numeric user, allows kubernetes to identify this user as being
# non-root when we use a security context with runAsNonRoot: true
USER 999

WORKDIR /home/argo-rollouts

ENTRYPOINT [ "/bin/rollouts-controller" ]