Function ComputeでgRPC サーバレスAPIを構築してみた

sudo s config add

sudo s init fc3-custom-python-grpc

cd fc3-custom-python-grpc

fc3-custom-python-grpc/

├─ s.yaml #　　　 Serverless Devs 用

├─ Dockerfile

├─ requirements.txt

├─ code/

│ ├─ app.py # 　　gRPC サーバーエントリ

│ ├─ helloworld.proto

│ ├─ helloworld_pb2.py

│ ├─ helloworld_pb2_grpc.py

│ └─ start.sh

syntax = "proto3";

package helloworld;

service Greeter {

  rpc SayHello(HelloRequest) returns (HelloReply);

}

message HelloRequest {

  string name = 1;

}

message HelloReply {

  string message = 1;

}

cd code

python -m pip install grpcio-tools

python -m grpc_tools.protoc -I. --python_out=. --grpc_python_out=. helloworld.proto

# app.py

from concurrent import futures

import os

import grpc

import helloworld_pb2, helloworld_pb2_grpc

PORT = int(os.environ.get("PORT", 8089))  # FC 側は 8089 を推奨

ADDR = f"[::]:{PORT}"

class Greeter(helloworld_pb2_grpc.GreeterServicer):

    def SayHello(self, request, context):

        name = request.name or "world"

        return helloworld_pb2.HelloReply(message=f"Hello {name}")

def serve():

    server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))

    helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)

    server.add_insecure_port(ADDR)  # コンテナ内部ではプレーンでリッスン

    print("Starting gRPC server on", ADDR)

    server.start()

    server.wait_for_termination()

if __name__ == "__main__":

    serve()

grpcio

grpcio-tools

#!/bin/sh

# Start gRPC server

python app.py

chmod +x code/start.sh

FROM python:3.9-slim

WORKDIR /app

# 必要なツールを入れる（軽量に）

RUN apt-get update && apt-get install -y --no-install-recommends \

    build-essential \

 && rm -rf /var/lib/apt/lists/*

COPY requirements.txt /app/

RUN pip install --no-cache-dir -r requirements.txt

# アプリをコピー

COPY code/ /app/

# ポートは内部で 8089 を使う（FC doc 推奨）

ENV PORT=8089

# 起動

CMD ["./start.sh"]

edition: 1.0.0

name: hello-world-app

access: "default"

vars: # グローバル変数

  region: "cn-shanghai"　#必要に応じてregionを書き換えてください

  service:

    name: "hello-world-service-0304"

    description: 'hello world by serverless devs'

    internetAccess: true

services:

  helloworld: # service name / model name

    component: fc

    actions:

      pre-deploy:

        - run: docker run --platform linux/amd64 --rm  -v  `pwd`/code:/code python:3.10-slim bash -c "cd /code && pip3 install -r requirements.txt -t . -i https://pypi.tuna.tsinghua.edu.cn/simple"

          path: .

    props:

      region: ${vars.region}

      service: ${vars.service}

      function:

        name: "fc-custom-python-grpc"

        description: 'hello world by serverless devs'

        timeout: 90

        memorySize: 512

        runtime: custom

        codeUri: ./code

        instanceConcurrency: 3

        caPort: 8089

        customRuntimeConfig:

          command:

            - “usr/bin/python3”

            - “code/app.py”

      triggers:

        - name: http2Trigger

          type: http

          config:

            protocol: grpc

            authType: anonymous

s deploy -y

# プロジェクトルートで

docker build -t grpc-fc-sample .

# コンテナを起動（ポートマップは任意）

docker run -p 8089:8089 grpc-fc-sample

grpcurl  -proto proto/helloworld.proto -plaintext -d  '{"name":"Alibaba"}'  localhost:8089 helloworld.Greeter/SayHello

{

  "message": "Hello Alibaba"

}

grpcurl -insecure \

  -proto proto/helloworld.proto \

  -d '{"name":"Alibaba"}' \

  fc-custhon-xxxxxx-shanghai.fcapp.run:8089 \

  helloworld.Greeter/SayHello

{

  "message": "Hello Alibaba"

}