如何在Golang中使用gRPC减小docker映像的大小？

Question

I have some server and clients who are communicating using gRPC/golang. Now I want to containerize my application but the size of the docker image containing goland execution and grpc support is larger(more than 1GB). I would like to decrease the size of the docker image.

The required golang version is 1.9 and higher. Here is the Dockerfile script is given. If there is other way please suggest it.

FROM golang:1.11

RUN apt-get update && \
    apt-get -y install git unzip build-essential autoconf libtool

RUN git clone https://github.com/google/protobuf.git && \
    cd protobuf && \
    ./autogen.sh && \
    ./configure && \
    make && \
    make install && \
    ldconfig && \
    make clean && \
    cd .. && \
    rm -r protobuf

RUN go get google.golang.org/grpc

RUN go get github.com/golang/protobuf/protoc-gen-go

RUN ls -la

WORKDIR /helloworld

COPY . /helloworld

RUN protoc -I helloworld/ helloworld/helloworld.proto --go_out=plugins=grpc:helloworld

CMD ["go", "run", "helloworld/greeter_server/main.go"]

Answer 1

try to make a multistage docker image like this

# Compile stage
FROM golang:1.11 as build-env

RUN apt-get update && \
    apt-get -y install git unzip build-essential autoconf libtool

RUN git clone https://github.com/google/protobuf.git && \
    cd protobuf && \
    ./autogen.sh && \
    ./configure && \
    make && \
    make install && \
    ldconfig && \
    make clean && \
    cd .. && \
    rm -r protobuf

RUN go get google.golang.org/grpc

RUN go get github.com/golang/protobuf/protoc-gen-go

RUN ls -la

WORKDIR /helloworld

COPY . /helloworld

RUN protoc -I helloworld/ helloworld/helloworld.proto --go_out=plugins=grpc:helloworld
RUN go build -o server helloworld/greeter_server/main.go

# Making image
FROM alpine:3.8 AS host
RUN apk add --no-cache \
        ca-certificates
COPY --from=build-env /helloworld/server /
# copy any other files you need

WORKDIR /
EXPOSE 8000
CMD ["server"]

Answer 2

You can try to use distroless base images and multi-stage builds. That might help you.