Kubernetes Admission Controller WebHooks mini framework
This package makes easy to implement webhook servers focusing only on the core loginc of an Admission handler.
A tipical use of this package is:
import (
"github.com/trilogy-group/central-tools/pkg/webhooks"
"github.com/trilogy-group/central-tools/pkg/webhooks/server"
)
func main () {
var ws webhooks.WebhookServer
ws = server.NewWebhookServerWithOptions(
nil, nil,
server.WithHandlers(webhooks.HandlersMap{
"/mutate/deployment": myMutationDeploymentFunction,
"/mutate/pod": myMutationPodFn,
"/validate": myValidationFunction,
}))
}
Where myValidationFunction (as the other 2) is an AdmissionHandler that takes an AdmissionReview and return an AdmissionResponse, implementing the logic of validation or mutation.
It's easy to add informers to keep some configuration updateable via ConfigMap or any other resource.
To achieve that we can share SharedInformerFactory and install many event handler, so many webhook handlers can reuse the same shared informers.