使用Go应用构建Docker：找不到软件包 [英] Build Docker with Go app: cannot find package

问题描述

我的Dockerfile位于 src / myapp 文件夹的根目录中， myapp 包含 myapp.go 与主软件包。

I have my Dockerfile in the root of directory with src/myapp folder, myapp contains myapp.go with main package.

Dockerfile 如下所示：

FROM golang:1.9.2

ADD . /
RUN go build myapp;

ENTRYPOINT ["/go/bin/myapp"]

我明白了出现以下错误：

I get following error:

can't load package: package myapp: cannot find package "myapp" in any of:
    /usr/local/go/src/myapp (from $GOROOT)
    /go/src/myapp (from $GOPATH)

我做错了什么？ docker完成 ADD 之后，能否登录 ls 命令吗？

What am I doing wrong? Can I log ls command after docker has done ADD?

推荐答案

您正在将所有文件复制到Image根目录，未安装任何依赖项，试图进行构建，然后从 / go / bin运行二进制文件/ app 。二进制文件在该目录中不存在，并且会产生错误。

You are copying all the files to Image root directory, Didn't installed any dependencies, Trying to Build it and then run the binary from /go/bin/app. The binary doesn't exists in that directory and it's generating errors.

我建议使用这样的Dockerfile，

I would recommend using a Dockerfile like this,

FROM golang:1.9.2 
ADD . /go/src/myapp
WORKDIR /go/src/myapp
RUN go get myapp
RUN go install
ENTRYPOINT ["/go/bin/myapp"]

这将执行以下操作。

1. 将项目文件复制到 / go / src / myapp 。


2. 将工作目录设置为 / go / src / myapp 。


3. 安装依赖项，我用go get但用您正在使用的依赖管理工具替换它。


4. 安装/构建二进制文件。


5. 设置入口点。

1. Copy project files to /go/src/myapp.
2. Set Working directory to /go/src/myapp.
3. Install dependencies, I used go get but replace it with which ever dependency management tool you are using.
4. Install/build the binary.
5. Set entry point.

您可以使用 ls 或任何其他命令> docker exec 。

You can run ls or any other command using docker exec.

示例：

docker exec <image name/hash> ls

您也可以在生成的图像中输入外壳，以使用

You can also enter the shell in the generated image to understand it well using

docker run --rm -it <image hash/name> /bin/sh

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