Dan Čermák
011bd6a79d
OBS-URL: https://build.opensuse.org/package/show/devel:BCI:Tumbleweed/golang-oldstable-image?expand=0&rev=97
82 lines
2.7 KiB
Markdown
82 lines
2.7 KiB
Markdown
# Go 1.21 development Container Image
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## Description
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[Go](https://go.dev/) (a.k.a., Golang) is a statically-typed programming language, with syntax loosely derived from C. Go offers additional features such as garbage collection, type safety, certain dynamic-typing capabilities, additional built-in types (for example, variable-length arrays and key-value maps) as well as a large standard library.
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## Usage
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To compile and deploy an application, copy the sources, fetch dependencies (assuming go.mod is used for dependency management), and build the binary:
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```Dockerfile
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# Build the application using the Go 1.21 development Container Image
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FROM registry.opensuse.org/opensuse/bci/golang:1.21 as build
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WORKDIR /app
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# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
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COPY go.mod go.sum ./
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RUN go mod download && go mod verify
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COPY . ./
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# Make sure to build the application with CGO disabled.
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# This will force Go to use some Go implementations of code
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# rather than those normally supplied by the host operating system.
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# You need this for scratch images as those supporting libraries
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# are not available.
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RUN CGO_ENABLED=0 go build -o /hello
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# Bundle the application into a scratch image
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FROM scratch
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COPY --from=build /hello /hello
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CMD ["/hello"]
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```
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Build and run the container image:
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```ShellSession
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$ podman build -t my-golang-app .
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$ podman run -it --rm my-golang-app
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```
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There are situations when you don't want to run an application inside a container.
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To compile the application, without running it inside a container instance, use the following command:
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```ShellSession
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$ podman run --rm -v "$PWD":/app:Z -w /app registry.opensuse.org/opensuse/bci/golang:1.21 go build -v
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```
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To run the application tests inside a container, use the following command:
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```ShellSession
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$ podman run --rm -v "$PWD":/app:Z -w /app registry.opensuse.org/opensuse/bci/golang:1.21 go test -v
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```
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**Note:** The Golang image should be used as a build environment. For runtime, self-contained Go binaries should use a `scratch` image and for applications that require external dependencies use the `bci-base` image.
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## Additional tools
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The following additional tools are included in the image:
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- go1.21-race
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- make
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- git-core
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## Licensing
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`SPDX-License-Identifier: MIT`
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This documentation and the build recipe are licensed as MIT.
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The container itself contains various software components under various open source licenses listed in the associated
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Software Bill of Materials (SBOM).
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This image is based on [openSUSE Tumbleweed](https://get.opensuse.org/tumbleweed/).
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