错误 go.mod：没有这样的文件或目录

Question

当我使用 docker 构建具有本地依赖项的应用程序以创建 docker 映像时，我遇到了问题。

我的 Dockerfile：

FROM golang:alpine AS build 

ENV GOPATH=$GOPATH
#GOPROXY
ENV GOPROXY=http://proxy.golang.org
ENV GO111MODULE=on


WORKDIR $GOPATH/src/github.com/julianskyline/motorcars-core-business

COPY . . 


# Set OS as linux
RUN GOOS=linux go build -o $GOPATH/bin/github.com/julianskyline/motorcars-core-business main.go

FROM alpine
COPY --from=build $GOPATH/bin/github.com/julianskyline/motorcars-core-business $GOPATH/bin/github.com/julianskyline/motorcars-core-business
ENTRYPOINT [ "/go/bin/motorcars-core-business" ]

My go.mod

module github.com/julianskyline/motorcars-core-business

go 1.15

replace (
    github.com/julianskyline/errors => /home/julianmarin/proyectos/go/src/github.com/julianskyline/errors
    github.com/julianskyline/motorcars-db => /home/julianmarin/proyectos/go/src/github.com/julianskyline/motorcars-db
    github.com/julianskyline/motorcars-models => /home/julianmarin/proyectos/go/src/github.com/julianskyline/motorcars-models)

项目位于同一文件夹中：

$GOPATH/src/github.com/julianskyline/errors $GOPATH/src/github.com/julianskyline/motorcars-core-business

在此处输入图像描述

go 构建/运行正常。

错误 sudo docker-compose 构建：

 Step 6/9 : RUN GOOS=linux go build -o $GOPATH/bin/github.com/julianskyline/motorcars-core-business main.go
 ---> Running in 45227441dfdd
go: github.com/julianskyline/errors@v0.0.0-00010101000000-000000000000 (replaced by /home/julianmarin/proyectos/go/src/github.com/julianskyline/errors): reading /home/julianmarin/proyectos/go/src/github.com/julianskyline/errors/go.mod: open /home/julianmarin/proyectos/go/src/github.com/julianskyline/errors/go.mod: no such file or directory
The command '/bin/sh -c GOOS=linux go build -o $GOPATH/bin/github.com/julianskyline/motorcars-core-business main.go' returned a non-zero code: 1
ERROR: Service 'api' failed to build 

注意：文件 /home/julianmarin/proyectos/go/src/github.com/julianskyline/errors/go.mod 存在！

Answer 1

Dockerfile在$GOPATH/src/github.com/julianskyline/motorcars-core-business这意味着COPY. . COPY. . 其中只会将$GOPATH/src/github.com/julianskyline/motorcars-core-business复制到 docker 图像中。

go.mod包含引用不在$GOPATH/src/github.com/julianskyline/motorcars-core-business下的文件夹的replace指令（例如$GOPATH/src/github.com/julianskyline/errors ）； 这会导致编译错误，因为 docker 映像中不存在这些文件夹。

要解决此问题，您可以：

• 将整个julianskyline文件夹复制到图像中（通过将Docker文件移动到父文件夹中， 在命令行上指定上下文或使用docker-compose ）。
• 删除replace指令并让go从 github 中提取文件。

按照评论中的要求发布答案； 我相信这些评论为 OP 提供了足够的信息。