Golang可执行文件未在多阶段dockerfile中运行
我有以下dockerfile：
FROM golang:1.18 as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
# PRODUCTION build
FROM golang:1.18-alpine as prd
COPY --from=build /app/server /app/server
CMD ["/app/server"]
构建成功，当我将图像运行在容器中时，它立即存在。我尝试使用cmd [“ Sleep”，“ 100000”]，将SSH运行到容器中，并在内部手动运行可执行文件 - 同样发生 - 立即退出与任何输出。
当我求助于Dockerfile的一个阶段时，它运行得可以：
FROM golang:1.18 as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
CMD ["./server"]
但是我想从Alpine构建最终图像，因此它较小。不幸的是，当我尝试在Alpine图像中构建GO应用程序时：
FROM golang:1.18-alpine as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
我会收到以下错误：
cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH
因此，我求助于多阶段构建。
如果这很重要，我在Mac上。
I have the following Dockerfile:
FROM golang:1.18 as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
# PRODUCTION build
FROM golang:1.18-alpine as prd
COPY --from=build /app/server /app/server
CMD ["/app/server"]
The build is successful and when I run the image in a container, it exists immediately. I tried to run the image with CMD ["sleep", "100000"] , ssh into the container and run the executable manually inside - the same same happens - immediate exit w/o any output.
When I resort to a single stage for the Dockerfile it runs alright:
FROM golang:1.18 as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
CMD ["./server"]
But I want to build the final image from alpine, so it's smaller. Unfortunately, when I try to build the go app within alpine image:
FROM golang:1.18-alpine as build
WORKDIR /app
COPY . .
RUN CGO_ENABLED=0 go build -o server
I get the following error:
cgo: C compiler "gcc" not found: exec: "gcc": executable file not found in $PATH
So, I resorted to a multistage build.
I'm on a Mac, if that's relevant.
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问题可能是跨平台编译构建go可执行的。
例如，要为Linux构建可执行文件，您可能需要设置鹅环境变量。
The issue may be cross platform compilation building a GO executable.
For example, to build an executable for linux, you may require to set the GOOS environment variable.