2015-05-05 17:07
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使用Docker容器部署Golang Web应用程序静态文件

I'm working on a small web application that has some static files (configs and html templates):

├── Dockerfile
├── manifest.json
├── session
│   ├── config.go
│   ├── handlers.go
│   └── restapi_client.go
├── templates
│   ├── header.tmpl
│   └── index.tmpl
└── webserver.go

For instance, templates in the code are discovered with a local path (is it a good practice?):

func init() {
    templates = template.Must(template.ParseGlob("templates/*.tmpl"))

Docker container is used for app deployment. As you can see in the Dockerfile, I have to copy all the static files in /go/bin directory:

FROM golang:latest


ADD . /go/src/webserver/
RUN go install webserver
RUN go get webserver

# Copy static files
RUN cp -r /go/src/webserver/templates /go/bin/templates
RUN cp -r /go/src/webserver/manifest.json /go/bin/manifest.json

ENTRYPOINT cd /go/bin && PORT=$PORT /go/bin/webserver -manifest=manifest.json

I think this workaround should be considered as incorrect since it violates standard Linux conventions (separate storing of the executable files and various data files). If anyone uses Docker for Golang web application deployment too, please share your experience:

  • How do you store static content and how do you discover it in your code?
  • What is the most proper method of deploying web application with a Docker containers?
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1条回答 默认 最新

  • duanbinren8906
    duanbinren8906 2015-05-05 22:20

    Since you are passing a relative pathname to template.ParseGlob, it will look for templates relative to the current working directory, which you are setting to /go/bin in your ENTRYPOINT.

    I would suggest modifying your Dockerfile to use the WORKDIR instruction to set the working directory to /go/src/webserver, which would avoid the need to copy files into /go/bin, for example:

    FROM golang:latest
    ADD . /go/src/webserver
    WORKDIR /go/src/webserver
    RUN go get
    RUN go install
    ENV PORT=8000
    EXPOSE 8000
    ENTRYPOINT /go/bin/webserver -manifest=manifest.json

    You could also consider using Flynn to deploy and manage your application (see here for a walkthrough of deploying a Go web app).

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