Creates a Jsonnet VM per HTTP request, converts the Yaml payload to Jsonnet, imports the referenced libraries, evaluates the document, and converts it back to yaml for response.
This application uses Rust FFI to call into Jsonnet library, and ksonnet-gen to generate a Jsonnet library from Kubernetes OpenAPI definition.
Compiling and linking requires libjsonnet.so, and also ksonnet-gen requires the Go compiler to build. There's a Makefile which takes care of all of these dependencies and will run the web service (all dependencies are installed in .deps/ so they don't interfere with your Go or Jsonnet installation).
Jsonnet VM will look for libraries in jpath and k8s.libsonnet is put there as well, upon generation.
As mentioned earlier the application is written in Rust so you'll require Rust in order for the make run to work. If you don't have Rust installed, installing it using rustup should be easy.
Once you have Rust and Cargo:
$ make run
And after a few minutes you should have a running web service listening on port 3000.
$ cat /tmp/example.yaml
metadata:
labels:
- acme.version('1.1')
spec:
containers:
- acme.webserver('lb')
$ curl --data-binary "@/tmp/example" -X POST http://localhost:3000/evaluate
metadata:
labels:
-
version: "1.1"
spec:
containers:
-
image: gcr.io/google_containers/nginx
name: lb