forked from kubernetes-sigs/kubebuilder
/
server.go
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/
server.go
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/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package webhook
import (
"fmt"
"path/filepath"
"sigs.k8s.io/kubebuilder/pkg/scaffold/input"
"sigs.k8s.io/kubebuilder/pkg/scaffold/resource"
)
var _ input.File = &Server{}
// Server scaffolds how to construct a webhook server and register webhooks.
type Server struct {
input.Input
// Resource is a resource in the API group
Resource *resource.Resource
Config
}
// GetInput implements input.File
func (a *Server) GetInput() (input.Input, error) {
if a.Path == "" {
a.Path = filepath.Join("pkg", "webhook", fmt.Sprintf("%s_server", a.Server), "server.go")
}
a.TemplateBody = serverTemplate
return a.Input, nil
}
var serverTemplate = `{{ .Boilerplate }}
package {{ .Server }}server
import (
"fmt"
"os"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/manager"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/webhook"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission/builder"
)
var (
log = logf.Log.WithName("{{ .Server }}_server")
builderMap = map[string]*builder.WebhookBuilder{}
// HandlerMap contains all admission webhook handlers.
HandlerMap = map[string][]admission.Handler{}
)
// Add adds itself to the manager
func Add(mgr manager.Manager) error {
ns := os.Getenv("POD_NAMESPACE")
if len(ns) == 0 {
ns = "default"
}
secretName := os.Getenv("SECRET_NAME")
if len(secretName) == 0 {
secretName = "webhook-server-secret"
}
svr, err := webhook.NewServer("foo-admission-server", mgr, webhook.ServerOptions{
// TODO(user): change the configuration of ServerOptions based on your need.
Port: 9876,
CertDir: "/tmp/cert",
BootstrapOptions: &webhook.BootstrapOptions{
Secret: &types.NamespacedName{
Namespace: ns,
Name: secretName,
},
Service: &webhook.Service{
Namespace: ns,
Name: "webhook-server-service",
// Selectors should select the pods that runs this webhook server.
Selectors: map[string]string{
"control-plane": "controller-manager",
},
},
},
})
if err != nil {
return err
}
var webhooks []webhook.Webhook
for k, builder := range builderMap {
handlers, ok := HandlerMap[k]
if !ok {
log.V(1).Info(fmt.Sprintf("can't find handlers for builder: %v", k))
handlers = []admission.Handler{}
}
wh, err := builder.
Handlers(handlers...).
WithManager(mgr).
Build()
if err != nil {
return err
}
webhooks = append(webhooks, wh)
}
return svr.Register(webhooks...)
}
`