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dockerprotocol-buffersgrpcprotogrpc-node

Run protoc command into docker container

I'm trying to run protoc command into a docker container.

I've tried using the gRPC image but protoc command is not found:

/bin/sh: 1: protoc: not found

So I assume I have to install manually using RUN instructions, but is there a better solution? An official precompiled image with protoc installed?

Also, I've tried to install via Dockerfile but I'm getting again protoc: not found.

This is my Dockerfile

#I'm not using "FROM grpc/node" because that image can't unzip
FROM node:12 

...

# Download proto zip
ENV PROTOC_ZIP=protoc-3.14.0-linux-x86_32.zip
RUN curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.14.0/${PROTOC_ZIP}
RUN unzip -o ${PROTOC_ZIP} -d ./proto 
RUN chmod 755 -R ./proto/bin
ENV BASE=/usr/local
# Copy into path
RUN cp ./proto/bin/protoc ${BASE}/bin
RUN cp -R ./proto/include/* ${BASE}/include

RUN protoc -I=...

I've done RUN echo $PATH to ensure the folder is in path and is ok:

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

Also RUN ls -la /usr/local/bin to check protoc file is into the folder and it shows:

-rwxr-xr-x 1 root root   4849692 Jan  2 11:16 protoc

So the file is in /bin folder and the folder is in the path.

Have I missed something?

Also, is there a simple way to get the image with protoc installed? or the best option is generate my own image and pull from my repository?

Thanks in advance.

Edit: Solved downloading linux-x86_64 zip file instead of x86_32. I downloaded the lower architecture requirements thinking a x86_64 machine can run a x86_32 file but not in the other way. I don't know if I'm missing something about architecture requirements (It's probably) or is a bug.

Anyway in case it helps someone I found the solution and I've added an answer with the neccessary Dockerfile to run protoc and protoc-gen-grpc-web.

Solution

  • Finally I solved my own issue.

    The problem was the arch version: I was using linux-x86_32.zip but works using linux-x86_64.zip

    Even @David Maze answer is incredible and so complete, it didn't solve my problem because using apt-get install version 3.0.0 and I wanted 3.14.0.

    So, the Dockerfile I have used to run protoc into a docker container is like this:

    FROM node:12

... 

# Download proto zip
ENV PROTOC_ZIP=protoc-3.14.0-linux-x86_64.zip
RUN curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v3.14.0/${PROTOC_ZIP}
RUN unzip -o ${PROTOC_ZIP} -d ./proto 
RUN chmod 755 -R ./proto/bin
ENV BASE=/usr
# Copy into path
RUN cp ./proto/bin/protoc ${BASE}/bin/
RUN cp -R ./proto/include/* ${BASE}/include/

# Download protoc-gen-grpc-web
ENV GRPC_WEB=protoc-gen-grpc-web-1.2.1-linux-x86_64
ENV GRPC_WEB_PATH=/usr/bin/protoc-gen-grpc-web
RUN curl -OL https://github.com/grpc/grpc-web/releases/download/1.2.1/${GRPC_WEB}
# Copy into path
RUN mv ${GRPC_WEB} ${GRPC_WEB_PATH}
RUN chmod +x ${GRPC_WEB_PATH}

RUN protoc -I=...