115 lines
7.9 KiB
Markdown
115 lines
7.9 KiB
Markdown
# Supported tags and respective `Dockerfile` links
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- [`1.5.4`, `1.5` (*1.5/Dockerfile*)](https://github.com/docker-library/golang/blob/d7e2a8d90a9b8f5dfd5bcd428e0c33b68c40cc19/1.5/Dockerfile)
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- [`1.5.4-onbuild`, `1.5-onbuild` (*1.5/onbuild/Dockerfile*)](https://github.com/docker-library/golang/blob/f1f65c0ab0097a5e3d079d5a74e2468e8d47563d/1.5/onbuild/Dockerfile)
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- [`1.5.4-wheezy`, `1.5-wheezy` (*1.5/wheezy/Dockerfile*)](https://github.com/docker-library/golang/blob/d7e2a8d90a9b8f5dfd5bcd428e0c33b68c40cc19/1.5/wheezy/Dockerfile)
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- [`1.5.4-alpine`, `1.5-alpine` (*1.5/alpine/Dockerfile*)](https://github.com/docker-library/golang/blob/f3768925fd0ebeb966c30bc64206b0e6020de66e/1.5/alpine/Dockerfile)
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- [`1.6.2`, `1.6`, `1`, `latest` (*1.6/Dockerfile*)](https://github.com/docker-library/golang/blob/0ce80411b9f41e9c3a21fc0a1bffba6ae761825a/1.6/Dockerfile)
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- [`1.6.2-onbuild`, `1.6-onbuild`, `1-onbuild`, `onbuild` (*1.6/onbuild/Dockerfile*)](https://github.com/docker-library/golang/blob/ce284e14cdee73fbaa8fb680011a812f272eae2e/1.6/onbuild/Dockerfile)
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- [`1.6.2-wheezy`, `1.6-wheezy`, `1-wheezy`, `wheezy` (*1.6/wheezy/Dockerfile*)](https://github.com/docker-library/golang/blob/0ce80411b9f41e9c3a21fc0a1bffba6ae761825a/1.6/wheezy/Dockerfile)
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- [`1.6.2-alpine`, `1.6-alpine`, `1-alpine`, `alpine` (*1.6/alpine/Dockerfile*)](https://github.com/docker-library/golang/blob/f3768925fd0ebeb966c30bc64206b0e6020de66e/1.6/alpine/Dockerfile)
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- [`1.7beta1`, `1.7` (*1.7/Dockerfile*)](https://github.com/docker-library/golang/blob/2372c8cafe9cc958bade33ad0b8b54de8869c21f/1.7/Dockerfile)
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- [`1.7beta1-onbuild`, `1.7-onbuild` (*1.7/onbuild/Dockerfile*)](https://github.com/docker-library/golang/blob/2372c8cafe9cc958bade33ad0b8b54de8869c21f/1.7/onbuild/Dockerfile)
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- [`1.7beta1-wheezy`, `1.7-wheezy` (*1.7/wheezy/Dockerfile*)](https://github.com/docker-library/golang/blob/2372c8cafe9cc958bade33ad0b8b54de8869c21f/1.7/wheezy/Dockerfile)
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- [`1.7beta1-alpine`, `1.7-alpine` (*1.7/alpine/Dockerfile*)](https://github.com/docker-library/golang/blob/f3768925fd0ebeb966c30bc64206b0e6020de66e/1.7/alpine/Dockerfile)
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[](https://imagelayers.io/?images=golang:1.5.4,golang:1.5.4-onbuild,golang:1.5.4-wheezy,golang:1.5.4-alpine,golang:1.6.2,golang:1.6.2-onbuild,golang:1.6.2-wheezy,golang:1.6.2-alpine,golang:1.7beta1,golang:1.7beta1-onbuild,golang:1.7beta1-wheezy,golang:1.7beta1-alpine)
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For more information about this image and its history, please see [the relevant manifest file (`library/golang`)](https://github.com/docker-library/official-images/blob/master/library/golang). This image is updated via [pull requests to the `docker-library/official-images` GitHub repo](https://github.com/docker-library/official-images/pulls?q=label%3Alibrary%2Fgolang).
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For detailed information about the virtual/transfer sizes and individual layers of each of the above supported tags, please see [the `golang/tag-details.md` file](https://github.com/docker-library/docs/blob/master/golang/tag-details.md) in [the `docker-library/docs` GitHub repo](https://github.com/docker-library/docs).
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# What is Go?
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Go (a.k.a., Golang) is a programming language first developed at Google. It is a statically-typed language with syntax loosely derived from C, but with additional features such as garbage collection, type safety, some dynamic-typing capabilities, additional built-in types (e.g., variable-length arrays and key-value maps), and a large standard library.
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> [wikipedia.org/wiki/Go_(programming_language)](http://en.wikipedia.org/wiki/Go_%28programming_language%29)
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# How to use this image
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## Start a Go instance in your app
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The most straightforward way to use this image is to use a Go container as both the build and runtime environment. In your `Dockerfile`, writing something along the lines of the following will compile and run your project:
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```dockerfile
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FROM golang:1.6-onbuild
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```
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This image includes multiple `ONBUILD` triggers which should cover most applications. The build will `COPY . /go/src/app`, `RUN go get -d -v`, and `RUN go install -v`.
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This image also includes the `CMD ["app"]` instruction which is the default command when running the image without arguments.
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You can then build and run the Docker image:
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```console
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$ docker build -t my-golang-app .
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$ docker run -it --rm --name my-running-app my-golang-app
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```
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*Note:* the default command in `golang:onbuild` is actually `go-wrapper run`, which includes `set -x` so the binary name is printed to stderr on application startup. If this behavior is undesirable, then adding `CMD ["app"]` (or `CMD ["myapp"]` if a [Go custom import path](https://golang.org/s/go14customimport) is in use) will silence it by running the built binary directly.
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## Compile your app inside the Docker container
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There may be occasions where it is not appropriate to run your app inside a container. To compile, but not run your app inside the Docker instance, you can write something like:
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```console
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$ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.6 go build -v
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```
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This will add your current directory as a volume to the container, set the working directory to the volume, and run the command `go build` which will tell go to compile the project in the working directory and output the executable to `myapp`. Alternatively, if you have a `Makefile`, you can run the `make` command inside your container.
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```console
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$ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.6 bash -c make
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```
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## Cross-compile your app inside the Docker container
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If you need to compile your application for a platform other than `linux/amd64` (such as `windows/386`):
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```console
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$ docker run --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp -e GOOS=windows -e GOARCH=386 golang:1.6 go build -v
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```
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Alternatively, you can build for multiple platforms at once:
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```console
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$ docker run --rm -it -v "$PWD":/usr/src/myapp -w /usr/src/myapp golang:1.6 bash
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$ for GOOS in darwin linux; do
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> for GOARCH in 386 amd64; do
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> go build -v -o myapp-$GOOS-$GOARCH
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> done
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> done
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```
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# License
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View [license information](http://golang.org/LICENSE) for the software contained in this image.
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# Supported Docker versions
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This image is officially supported on Docker version 1.11.2.
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Support for older versions (down to 1.6) is provided on a best-effort basis.
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Please see [the Docker installation documentation](https://docs.docker.com/installation/) for details on how to upgrade your Docker daemon.
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# User Feedback
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## Documentation
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Documentation for this image is stored in the [`golang/` directory](https://github.com/docker-library/docs/tree/master/golang) of the [`docker-library/docs` GitHub repo](https://github.com/docker-library/docs). Be sure to familiarize yourself with the [repository's `README.md` file](https://github.com/docker-library/docs/blob/master/README.md) before attempting a pull request.
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## Issues
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If you have any problems with or questions about this image, please contact us through a [GitHub issue](https://github.com/docker-library/golang/issues). If the issue is related to a CVE, please check for [a `cve-tracker` issue on the `official-images` repository first](https://github.com/docker-library/official-images/issues?q=label%3Acve-tracker).
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You can also reach many of the official image maintainers via the `#docker-library` IRC channel on [Freenode](https://freenode.net).
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## Contributing
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You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.
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Before you start to code, we recommend discussing your plans through a [GitHub issue](https://github.com/docker-library/golang/issues), especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.
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