英文:
How to format a DockerFile to look at a sub-directory where the app is
问题
你可以在Dockerfile中的COPY命令中指定正确的目录路径，将*.go的复制路径修改为./app/*.go。这样Dockerfile就会在app子目录中查找.go文件了。
修改后的Dockerfile如下所示：
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine
WORKDIR /app
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY ./app/*.go ./
RUN go build -o /docker-gs-ping
EXPOSE 8080
CMD ["/docker-gs-ping"]
这样修改后，Dockerfile将会在app子目录中查找并复制.go文件。
英文:
My DockerFile is looking for .go files in the wrong directory, it needs to be looking at the sub-directory called app
Here is my folder set up, parent folder is my-app
my-app/
├─ app/
│ ├─ api
│ ├─ go.mod
│ ├─ go.sum
│ ├─ main.go
DockerFile
DockerFile:
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine
WORKDIR /app
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY *.go ./
RUN go build -o /docker-gs-ping
EXPOSE 8080
CMD [ "/docker-gs-ping" ]
As for now the DockerFile is looking for the go files in the directory where DockerFile is, not in the app sub-directory. Where can I fix that?
答案1
得分: 2
以下是一个构建轻量级 Docker 镜像的可能解决方案：
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine as builder
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
WORKDIR /app
COPY app/* ./
RUN go mod download
RUN go build -o /docker-gs-pings *.go
EXPOSE 8080
FROM scratch
EXPOSE 8080
COPY --from=builder /docker-gs-pings /
CMD ["/docker-gs-pings"]
这个 Dockerfile 文件定义了两个阶段的构建过程。第一个阶段使用 golang:1.16-alpine 作为基础镜像，设置了一些环境变量，并在 /app 目录下复制了应用程序的文件。然后，它下载了依赖并构建了可执行文件 /docker-gs-pings。在第二个阶段，使用 scratch 作为基础镜像，将可执行文件复制到根目录，并暴露了端口 8080。最后，通过 CMD 指令运行了 /docker-gs-pings 可执行文件。
希望对你有帮助！
英文:
Here a possible solution building a lightweight docker image
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine as builder
ENV GO111MODULE=on \
CGO_ENABLED=0 \
GOOS=linux \
GOARCH=amd64
WORKDIR /app
COPY app/* ./
RUN go mod download
RUN go build -o /docker-gs-pings *.go
EXPOSE 8080
FROM scratch
EXPOSE 8080
COPY --from=builder /docker-gs-pings /
CMD [ "/docker-gs-pings" ]
答案2
得分: 1
根据我的理解，应该是这样的，基本上将所有内容复制到应用程序中，运行下载和构建命令。
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine
WORKDIR /app
COPY app/ .
RUN go mod download
RUN go build -o /docker-gs-ping
EXPOSE 8080
CMD ["/docker-gs-ping"]
英文:
From what I understand it should be like this, basically copy everything to the app, run the download and build commands.
# syntax=docker/dockerfile:1
FROM golang:1.16-alpine
WORKDIR /app
COPY app/ .
RUN go mod download
RUN go build -o /docker-gs-ping
EXPOSE 8080
CMD [ "/docker-gs-ping" ]
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