Publish container images using Swift Package Manager.
Learn more about Swift Container Plugin in the lightning talk from ServerSide.Swift 2024.
Swift Container Plugin provides a Swift Package Manager command plugin and utilities to make it easy to build container images for servers written in Swift.
Container images are the standard way to package cloud software today. Once you have packaged your server in a container image, you can deploy it on any container-based public or private cloud service, or run it locally using a desktop container runtime.
After setting up your project, you can use the plugin to build and publish a container image in one step:
% swift package --swift-sdk x86_64-swift-linux-musl \
build-container-image --repository registry.example.com/myservice
...
Plugin ‘ContainerImageBuilder’ wants permission to allow all network connections on all ports.
Stated reason: “This command publishes images to container registries over the network”.
Allow this plugin to allow all network connections on all ports? (yes/no) yes
...
Building for debugging...
Build of product 'containertool' complete! (4.95s)
...
Build of product 'hello-world' complete! (5.51s)
...
[ContainerImageBuilder] Found base image manifest: sha256:7bd643386c6e65cbf52f6e2c480b7a76bce8102b562d33ad2aff7c81b7169a42
[ContainerImageBuilder] Found base image configuration: sha256:b904a448fde1f8088913d7ad5121c59645b422e6f94c13d922107f027fb7a5b4
[ContainerImageBuilder] Built application layer
[ContainerImageBuilder] Uploading application layer
[ContainerImageBuilder] Layer sha256:dafa2b0c44d2cfb0be6721f079092ddf15dc8bc537fb07fe7c3264c15cb2e8e6: already exists
[ContainerImageBuilder] Layer sha256:2565d8e736345fc7ba44f9b3900c5c20eda761eee01e01841ac7b494f9db5cf6: already exists
[ContainerImageBuilder] Layer sha256:2c179bb2e4fe6a3b8445fbeb0ce5351cf24817cb0b068c75a219b12434c54a58: already exists
registry.example.com/myservice@sha256:a3f75d0932d052dd9d448a1c9040b16f9f2c2ed9190317147dee95a218faf1df
You can then use a container runtime, such as podman to run the image:
% podman run -p 8080:8080 registry.example.com/myservice@sha256:a3f75d0932d052dd9d448a1c9040b16f9f2c2ed9190317147dee95a218faf1df
Trying to pull registry.example.com/myservice@sha256:a3f75d0932d052dd9d448a1c9040b16f9f2c2ed9190317147dee95a218faf1df...
...
2024-05-26T22:57:50+0000 info HummingBird : [HummingbirdCore] Server started and listening on 0.0.0.0:8080
Swift Container Plugin requires Swift 6.0 and runs on macOS and Linux. It does not require a local container runtime to be installed in order to build an image.
Learn more about setting up your project in the ContainerImageBuilder plugin documentation.
Take a look at the Examples.