Docker 看不到 main.go

Question

我对 Docker 有一些问题。我的 dockerfile 没有看到 main.go。我有那个结构项目docker-compose.yml  go.modfrontend-microservice    -cmd      -app      -main.go  -internal    -some folders当我尝试启动 docker-compose 时，它给了我那个错误。ERROR: Service 'frontend-microservice' failed to build: The command '/bin/sh -c CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /frontend-microservice .' returned a non-zero code: 1顺便说一句 dockerfile 给出与 go.mod 相关的错误我的 docker-composeversion: "3"services:    frontend-microservice:        build:                context: ./frontend-microservice/            dockerfile: Dockerfile        ports:            - 80:80我的 dockerfile# golang image where workspace (GOPATH) configured at /go.FROM golang:alpine as builderADD . /go/src/frontend-microserviceWORKDIR /go/src/frontend-microserviceRUN go mod downloadCOPY . ./RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /frontend-microservice .FROM alpine:latestRUN apk --no-cache add ca-certificates COPY --from=builder /frontend-microservice ./frontend-microserviceRUN mkdir ./configs COPY ./configs/config.json ./configs EXPOSE 8080 ENTRYPOINT ["./frontend-microservice"]预先感谢您的任何帮助

Answer 1

定义函数的文件main()位于cmd/app. 不是将当前工作目录更改为cmd/app，而是附加cmd/app/main.go到go build命令。

你Dockerfile看起来像这样：

# golang image where workspace (GOPATH) configured at /go.

FROM golang:alpine as builder

ADD . /go/src/frontend-microservice

WORKDIR /go/src/frontend-microservice

RUN go mod download

COPY . ./

RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /frontend-microservice cmd/app/main.go

FROM alpine:latest

RUN apk --no-cache add ca-certificates

 

COPY --from=builder /frontend-microservice ./frontend-microservice

RUN mkdir ./configs 

COPY ./configs/config.json ./configs

 

EXPOSE 8080

 

ENTRYPOINT ["./frontend-microservice"]