Simplify 'make docker', take in release from VERSION file

Author: timvaillancourt

Dockerfile

@@ -1,8 +1,9 @@
 FROM centos:centos7
+ARG RELEASE
 MAINTAINER Tim Vaillancourt <tim.vaillancourt@percona.com>
 RUN yum install -y https://www.percona.com/redir/downloads/percona-release/redhat/latest/percona-release-0.1-4.noarch.rpm epel-release && \
 	yum install -y Percona-Server-MongoDB-34-tools zbackup && yum clean all && \
-	curl -Lo /usr/bin/mongodb-consistent-backup https://github.com/Percona-Lab/mongodb_consistent_backup/releases/download/1.0.3/mongodb-consistent-backup.el7.centos.x86_64 && \
+	curl -Lo /usr/bin/mongodb-consistent-backup https://github.com/Percona-Lab/mongodb_consistent_backup/releases/download/$RELEASE/mongodb-consistent-backup.el7.centos.x86_64 && \
 	chmod +x /usr/bin/mongodb-consistent-backup
 ENTRYPOINT ["mongodb-consistent-backup"]
 CMD ["--help"]

Makefile

@@ -7,6 +7,7 @@ PREFIX?=/usr/local
 BASEDIR?=$(DESTDIR)$(PREFIX)
 BINDIR?=$(BASEDIR)/bin
 SHAREDIR?=$(BASEDIR)/share
+DOCKER_TAG?="$(NAME):$(VERSION)"
 
 
 all: bin/mongodb-consistent-backup
@@ -35,7 +36,7 @@ rpm: bin/mongodb-consistent-backup
 	rpmbuild -D "_topdir $(PWD)/build/rpm" -D "version $(VERSION)" -bb scripts/$(NAME).spec
 
 docker:
-	docker build --no-cache -t mongodb_consistent_backup .
+	docker build --no-cache --tag $(DOCKER_TAG) --build-arg "RELEASE=$(VERSION)" .
 
 clean:
 	rm -rf bin build $(NAME).egg-info tmp 2>/dev/null