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main.go
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main.go
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/*
Copyright 2020 VMware, Inc.
SPDX-License-Identifier: Apache-2.0
*/
package main
import (
"context"
"os"
"k8s.io/apimachinery/pkg/runtime/schema"
"knative.dev/pkg/configmap"
"knative.dev/pkg/controller"
"knative.dev/pkg/injection"
"knative.dev/pkg/injection/sharedmain"
"knative.dev/pkg/logging"
"knative.dev/pkg/metrics"
"knative.dev/pkg/signals"
"knative.dev/pkg/webhook"
"knative.dev/pkg/webhook/certificates"
"knative.dev/pkg/webhook/configmaps"
"knative.dev/pkg/webhook/psbinding"
"knative.dev/pkg/webhook/resourcesemantics"
"knative.dev/pkg/webhook/resourcesemantics/defaulting"
"knative.dev/pkg/webhook/resourcesemantics/validation"
"github.com/vmware-tanzu/sources-for-knative/pkg/apis/sources/v1alpha1"
"github.com/vmware-tanzu/sources-for-knative/pkg/reconciler/vspherebinding"
"github.com/vmware-tanzu/sources-for-knative/pkg/reconciler/vspheresource"
)
var types = map[schema.GroupVersionKind]resourcesemantics.GenericCRD{
// List the types to validate.
v1alpha1.SchemeGroupVersion.WithKind("VSphereSource"): &v1alpha1.VSphereSource{},
v1alpha1.SchemeGroupVersion.WithKind("VSphereBinding"): &v1alpha1.VSphereBinding{},
}
const (
admissionWebhookName = "vsphere-source-webhook"
)
func NewDefaultingAdmissionController(ctx context.Context, cmw configmap.Watcher) *controller.Impl {
return defaulting.NewAdmissionController(ctx,
// Name of the resource webhook.
"defaulting.webhook.vsphere.sources.tanzu.vmware.com",
// The path on which to serve the webhook.
"/defaulting",
// The resources to validate and default.
types,
// A function that infuses the context passed to Validate/SetDefaults with custom metadata.
func(ctx context.Context) context.Context {
// Here is where you would infuse the context with state
// (e.g. attach a store with configmap data)
return ctx
},
// Whether to disallow unknown fields.
true,
)
}
func NewValidationAdmissionController(ctx context.Context, cmw configmap.Watcher) *controller.Impl {
return validation.NewAdmissionController(ctx,
// Name of the resource webhook.
"validation.webhook.vsphere.sources.tanzu.vmware.com",
// The path on which to serve the webhook.
"/resource-validation",
// The resources to validate and default.
types,
// A function that infuses the context passed to Validate/SetDefaults with custom metadata.
func(ctx context.Context) context.Context {
// Here is where you would infuse the context with state
// (e.g. attach a store with configmap data)
return ctx
},
// Whether to disallow unknown fields.
true,
)
}
func NewConfigValidationController(ctx context.Context, cmw configmap.Watcher) *controller.Impl {
return configmaps.NewAdmissionController(ctx,
// Name of the configmap webhook.
"config.webhook.vsphere.sources.tanzu.vmware.com",
// The path on which to serve the webhook.
"/config-validation",
// The configmaps to validate.
configmap.Constructors{
logging.ConfigMapName(): logging.NewConfigFromConfigMap,
metrics.ConfigMapName(): metrics.NewObservabilityConfigFromConfigMap,
},
)
}
func NewVSphereBindingWebhook(opts ...psbinding.ReconcilerOption) injection.ControllerConstructor {
return func(ctx context.Context, cmw configmap.Watcher) *controller.Impl {
return psbinding.NewAdmissionController(ctx,
// Name of the resource webhook.
"vspherebindings.webhook.vsphere.sources.tanzu.vmware.com",
// The path on which to serve the webhook.
"/vspherebindings",
// How to get all the Bindables for configuring the mutating webhook.
vspherebinding.ListAll,
// A function that infuses the context passed to Validate/SetDefaults with custom metadata.
func(ctx context.Context, _ psbinding.Bindable) (context.Context, error) {
// Here is where you would infuse the context with state
// (e.g. attach a store with configmap data)
return ctx, nil
},
opts...,
)
}
}
func main() {
ctx := webhook.WithOptions(signals.NewContext(), webhook.Options{
ServiceName: admissionWebhookName,
Port: 8443,
SecretName: "vsphere-webhook-certs",
})
vsbSelector := psbinding.WithSelector(psbinding.ExclusionSelector)
if os.Getenv("VSPHERE_BINDING_SELECTION_MODE") == "inclusion" {
vsbSelector = psbinding.WithSelector(psbinding.InclusionSelector)
}
sharedmain.MainWithContext(ctx, admissionWebhookName,
certificates.NewController,
NewDefaultingAdmissionController,
NewValidationAdmissionController,
NewConfigValidationController,
// For each binding we have a controller and a binding webhook.
vspherebinding.NewController, NewVSphereBindingWebhook(vsbSelector),
// Also run our source controller here.
vspheresource.NewController,
)
}