Dockerfile

FROM registry.access.redhat.com/ubi8/ubi-minimal:latest as build

RUN /bin/true \
  && echo $'[appstream]\n\
name=CentOS Stream $releasever - AppStream\n\
mirrorlist=http://mirrorlist.centos.org/?repo=AppStream&arch=$basearch&release=8-stream\n\
gpgcheck=0\n\
enabled=1\n\
  ' >/etc/yum.repos.d/upstream.repo \
  && microdnf --nodocs update \
  && microdnf --nodocs install go-toolset openssh-clients git \
  && microdnf clean all \
  && rm -rf /var/cache/yum \
  && /bin/true

ARG GO111MODULE="on"
ENV GO111MODULE $GO111MODULE
USER root

WORKDIR /tmp/build
# First, download dependencies so we can cache this layer
COPY go.mod .
COPY go.sum .
COPY internal/*.go .

RUN if [ "${GO111MODULE}" = "on" ]; then go mod download; fi

# Copy the rest of the source code and build
COPY . .

ENV GOOS=linux
ENV GOARCH=amd64
ENV GOPRIVATE=github.ibm.com
ARG PROGRAM="vsi-proxy"

ENV CGO_ENABLED=0


RUN mkdir -p /etc/vsi-proxy/config
RUN mkdir -p /etc/vsi-proxy/templates

RUN cp -p internal/cloud-config-template.tmpl /etc/vsi-proxy/templates/

# Display Go version and build
RUN go version && \
  go build \
  -a \
  -tags timetzdata,netgo,osusergo \
  -ldflags='-extldflags "-static"' \
  -o "${PROGRAM}" \
  ./*.go && ls
RUN cp -p "${PROGRAM}" /usr/bin/vsi-proxy

# Multi stage build
FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
USER 0
RUN mkdir -p /etc/vsi-proxy/config
RUN mkdir -p /opt/vsi-proxy/templates
RUN mkdir -p /opt/vsi-proxy/generated
WORKDIR /opt/vsi-proxy
COPY --from=build /usr/bin/vsi-proxy /opt/vsi-proxy/vsi-proxy
COPY --from=build /etc/vsi-proxy/templates/cloud-config-template.tmpl /opt/vsi-proxy/templates/cloud-config-template.tmpl
ENTRYPOINT [ "/opt/vsi-proxy/vsi-proxy", "-config", "/etc/vsi-proxy/config/vsi-proxy-config.yaml" ]