Use a multi-stage Docker build to build the Ingress container.

The build process is run entirely by Docker containers, for more
reliable reproducibility.

make targets for local builds can still be run for developement,
and the check/test targets are only used locally.

Dockerfile

-FROM centos:centos7
+FROM golang:1.10.3 as builder
+COPY . /go/src/code.uplex.de/uplex-varnish/k8s-ingress
+ARG PACKAGES
+RUN go get -d -v github.com/slimhazard/gogitversion && \
+    cd /go/src/github.com/slimhazard/gogitversion && \
+    make install && \
+    cd /go/src/code.uplex.de/uplex-varnish/k8s-ingress && \
+    go get -v $PACKAGES && \
+    go generate && \
+    go build -o k8-ingress *.go
 
+FROM centos:centos7
 COPY varnishcache_varnish60.repo /etc/yum.repos.d/
-
 RUN yum install -y epel-release && yum update -y -q && \
     yum -q makecache -y --disablerepo='*' --enablerepo='varnishcache_varnish60' && \
     yum-config-manager --add-repo https://pkg.uplex.de/rpm/7/uplex-varnish/x86_64/ && \
     yum install -y -q varnish-6.0.1 && \
     yum install -y -q --nogpgcheck vmod-re2-1.5.1 && \
     yum clean all && rm -rf /var/cache/yum
-
-COPY k8s-ingress varnish/vcl/vcl.tmpl /
-
-ENTRYPOINT ["/k8s-ingress"]
+COPY varnish/vcl/vcl.tmpl /
+COPY --from=builder /go/src/code.uplex.de/uplex-varnish/k8s-ingress .
+ENTRYPOINT ["./k8s-ingress"]

Makefile

@@ -67,8 +67,9 @@ ifeq ($(MINKUBE),1)
 	eval $(minikube docker-env)
 endif
 
-container: check docker-minikube
-	docker build $(DOCKER_BUILD_OPTIONS) -t $(IMAGE) .
+container: docker-minikube
+	docker build --build-arg PACKAGES="$(PACKAGES)" \
+	$(DOCKER_BUILD_OPTIONS) -t $(IMAGE) .
 
 push: docker-minikube container
 	docker push $(IMAGE)