Use multi-stage build in dockerfile (cadence-workflow#1447)

docker/Dockerfile

@@ -18,60 +18,48 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-FROM debian:jessie
+# Build cadence binaries
+FROM golang:1.11.1 as builder
 
 # Specify the cadence version to be built into this docker image
 # See https://github.com/uber/cadence/tags
 ARG git_branch
 RUN if [ -z "$git_branch" ]; then echo "ERROR: git_branch NOT SET. Usage: docker build . --build-arg git_branch=YOUR_CHECKOUT_BRANCH"; exit 1; else : ; fi
 
-# get golang 1.8.1
+RUN go get -u github.com/golang/dep/cmd/dep
+RUN go get -u github.com/golang/lint/golint
+
+# get and compile cadence-server
+RUN git clone https://github.com/uber/cadence.git /go/src/github.com/uber/cadence
+RUN cd /go/src/github.com/uber/cadence && git checkout $git_branch && make bins_nothrift
+
+
+# Final Cadence image
+FROM debian:jessie
+
 RUN apt-get update && apt-get install -y --no-install-recommends \
-		g++ \
-		gcc \
-		libc6-dev \
-		make \
-		pkg-config \
-		libev4 libev-dev \
 		gettext-base \
 		wget \
 		vim \
 		tcpdump \
 		netcat \
 		python-pip \
-		git-all \
 	&& rm -rf /var/lib/apt/lists/*
 
 RUN pip install cqlsh
 
-ENV GOLANG_VERSION 1.11.1
-ENV GOLANG_DOWNLOAD_URL https://golang.org/dl/go$GOLANG_VERSION.linux-amd64.tar.gz
-ENV GOLANG_DOWNLOAD_SHA256 2871270d8ff0c8c69f161aaae42f9f28739855ff5c5204752a8d92a1c9f63993
-
-RUN set -eux; \
-    wget -O golang.tar.gz "$GOLANG_DOWNLOAD_URL" \
-	&& echo "$GOLANG_DOWNLOAD_SHA256 golang.tar.gz" | sha256sum -c - \
-	&& tar -C /usr/local -xzf golang.tar.gz \
-	&& rm golang.tar.gz
-
-ENV GOPATH /go
-ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH
-RUN mkdir -p "$GOPATH/src" "$GOPATH/bin" && chmod -R 777 "$GOPATH"
-
-# get and compile cadence-server
-ENV CADENCE_HOME $GOPATH/src/github.com/uber/cadence
-
-RUN go get -u github.com/golang/dep/cmd/dep
-RUN go get -u github.com/golang/lint/golint
-
-RUN git clone https://github.com/uber/cadence.git $CADENCE_HOME
-RUN cd $CADENCE_HOME && git checkout $git_branch && make bins_nothrift
+RUN mkdir /cadence
+ENV CADENCE_HOME /cadence
 
 EXPOSE 7933 7934 7935 7939
 
 COPY ./start.sh $CADENCE_HOME/start.sh
 COPY ./config_template.yaml $CADENCE_HOME/config/docker_template.yaml
 RUN chmod a+x $CADENCE_HOME/start.sh
 
+COPY --from=builder /go/src/github.com/uber/cadence/cadence-cassandra-tool /cadence
+COPY --from=builder /go/src/github.com/uber/cadence/cadence /cadence
+COPY --from=builder /go/src/github.com/uber/cadence/cadence-server /cadence
+
 WORKDIR $CADENCE_HOME
 CMD ./start.sh $CADENCE_HOME