Add Support for Centos-8

Signed-off-by: Arko Dasgupta <arko.dasgupta@docker.com>

rpm/Makefile

@@ -43,7 +43,7 @@ SOURCE_FILES=engine-image engine.tgz cli.tgz docker.service docker.socket distri
 SOURCES=$(addprefix rpmbuild/SOURCES/, $(SOURCE_FILES))
 
 FEDORA_RELEASES := fedora-31 fedora-30 fedora-29
-CENTOS_RELEASES := centos-7
+CENTOS_RELEASES := centos-7 centos-8
 
 .PHONY: help
 help: ## show make targets

rpm/centos-8/Dockerfile

@@ -0,0 +1,27 @@
+ARG GO_IMAGE
+ARG DISTRO=centos
+ARG SUITE=8
+ARG BUILD_IMAGE=${DISTRO}:${SUITE}
+
+FROM ${GO_IMAGE} AS golang
+
+FROM ${BUILD_IMAGE}
+ENV GOPROXY=direct
+ENV GO111MODULE=off
+ENV GOPATH=/go
+ENV PATH $PATH:/usr/local/go/bin:$GOPATH/bin
+ENV AUTO_GOPATH 1
+ENV DOCKER_BUILDTAGS seccomp selinux
+ENV RUNC_BUILDTAGS seccomp selinux
+ARG DISTRO
+ARG SUITE
+ENV DISTRO=${DISTRO}
+ENV SUITE=${SUITE}
+RUN yum install -y rpm-build rpmlint
+COPY SPECS /root/rpmbuild/SPECS
+# Overwrite repo that was failing on aarch64
+RUN sed -i 's/altarch/centos/g' /etc/yum.repos.d/CentOS-Sources.repo
+RUN yum-builddep -y /root/rpmbuild/SPECS/*.spec
+COPY --from=golang /usr/local/go /usr/local/go
+WORKDIR /root/rpmbuild
+ENTRYPOINT ["/bin/rpmbuild"]