英文:
GO / Golang run project on Docker issues - Cannot find packages (internal folders)
问题
我正在尝试在Docker上运行我的第一个Golang项目。
虽然我成功地运行了一个简单的“hello world”应用程序，但在一个稍微结构化一些的项目中遇到了一些困难。
该项目有一些文件夹，我在main.go文件中导入了这些文件夹。
当我尝试在Docker上运行我的解决方案时，它在加载这些“包”时卡住了。
这是我的Dockerfile：
FROM golang:1.17-alpine
WORKDIR /app
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY *.go ./
RUN go env GOROOT
RUN go build -o /my-api
EXPOSE 8080
CMD ["/my-api"]
这是我得到的错误：
Step 8/10 : RUN go build -o /my-api
---> Running in c1c9d1058caa
main.go:10:2: package my-api/Repositories is not in GOROOT (/usr/local/go/src/my-api/Repositories)
main.go:11:2: package my-api/Settings is not in GOROOT (/usr/local/go/src/my-api/Settings)
我注意到一个问题是这个路径
/usr/local/go/src/my-api/Settings
应该是
/usr/local/gocode/src/my-api/Settings
在我的本地机器上。
这是我项目结构的一瞥：
有什么想法吗？
英文:
I'm trying to run my first Golang project on Docker.
While I succeeded with a simple "hello world" application, I'm facing some difficulties with a slightly more structured project.
The project has some folders inside which I imported in the main.go file.
When I try to run my solution on Docker, it gets stuck while loading those "packages".
This is my Dockerfile
FROM golang:1.17-alpine
WORKDIR /app
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY *.go ./
RUN go env GOROOT
RUN go build -o /my-api
EXPOSE 8080
CMD [ "/my-api" ]
This is the error I get
Step 8/10 : RUN go build -o /my-api
---> Running in c1c9d1058caa
main.go:10:2: package my-api/Repositories is not in GOROOT (/usr/local/go/src/my-api/Repositories)
main.go:11:2: package my-api/Settings is not in GOROOT (/usr/local/go/src/my-api/Settings)
One thing I noticed is that this path
/usr/local/go/src/my-api/Settings
should be
/usr/local/gocode/src/my-api/Settings
on my local machine
Here is a glimpse into how my project is structured
Any ideas?
答案1
得分: 2
为什么不使用像下面这样的Dockerfile：
FROM golang:1.17-alpine
RUN apk add build-base
WORKDIR /app
ADD . /app
RUN go build -o /my-api
EXPOSE 8080
CMD ["/my-api"]
这将把本地目录的内容复制到镜像中的/app目录中。
注意：为了构建一个“生产级别”的镜像，我会使用多阶段构建：
FROM golang:1.17-alpine as builder
RUN apk add build-base
WORKDIR /app
ADD . /app
RUN go build -o /my-api
FROM alpine:3.14
COPY --from=builder /my-api /
EXPOSE 8080
CMD ["/my-api"]
英文:
Why not use a Dockerfile like:
FROM golang:1.17-alpine
RUN apk add build-base
WORKDIR /app
ADD . /app
RUN go build -o /my-api
EXPOSE 8080
CMD [ "/my-api" ]
This will copy the contents of the local directory on your local machine to /app in the image.
Note: To build a "production grade" image, I'd use a multistage build:
FROM golang:1.17-alpine as builder
RUN apk add build-base
WORKDIR /app
ADD . /app
RUN go build -o /my-api
FROM alpine:3.14
COPY --from=builder /my-api /
EXPOSE 8080
CMD [ "/my-api" ]
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