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storage.go
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storage.go
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package tls
import (
"context"
"github.com/rancher/dynamiclistener"
v1 "github.com/rancher/k3s/pkg/apis/k3s.cattle.io/v1"
k3sclient "github.com/rancher/k3s/pkg/generated/controllers/k3s.cattle.io/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
ns = "kube-system"
name = "tls-config"
)
func NewServer(ctx context.Context, listenerConfigs k3sclient.ListenerConfigController, config dynamiclistener.UserConfig) (dynamiclistener.ServerInterface, error) {
storage := &listenerConfigStorage{
client: listenerConfigs,
cache: listenerConfigs.Cache(),
config: config,
}
server, err := dynamiclistener.NewServer(storage, config)
if err != nil {
return nil, err
}
listenerConfigs.OnChange(ctx, "listen-config", func(key string, obj *v1.ListenerConfig) (*v1.ListenerConfig, error) {
if obj == nil {
return nil, nil
}
return obj, server.Update(storage.fromStorage(obj))
})
return server, err
}
type listenerConfigStorage struct {
cache k3sclient.ListenerConfigCache
client k3sclient.ListenerConfigClient
config dynamiclistener.UserConfig
}
func (l *listenerConfigStorage) Set(config *dynamiclistener.ListenerStatus) (*dynamiclistener.ListenerStatus, error) {
if config == nil {
return nil, nil
}
obj, err := l.cache.Get(ns, name)
if errors.IsNotFound(err) {
ls := v1.NewListenerConfig(ns, name, v1.ListenerConfig{
Status: *config,
})
ls, err := l.client.Create(ls)
return l.fromStorage(ls), err
} else if err != nil {
return nil, err
}
obj = obj.DeepCopy()
obj.ResourceVersion = config.Revision
obj.Status = *config
obj.Status.Revision = ""
if l.config.CAKey != "" {
obj.Status.CAKey = ""
}
obj, err = l.client.Update(obj)
return l.fromStorage(obj), err
}
func (l *listenerConfigStorage) Get() (*dynamiclistener.ListenerStatus, error) {
obj, err := l.cache.Get(ns, name)
if errors.IsNotFound(err) {
obj, err = l.client.Get(ns, name, metav1.GetOptions{})
}
if errors.IsNotFound(err) {
return &dynamiclistener.ListenerStatus{}, nil
}
return l.fromStorage(obj), err
}
func (l *listenerConfigStorage) fromStorage(obj *v1.ListenerConfig) *dynamiclistener.ListenerStatus {
if obj == nil {
return nil
}
copy := obj.DeepCopy()
copy.Status.Revision = obj.ResourceVersion
if l.config.CACerts != "" && l.config.CAKey != "" {
if copy.Status.CACert != l.config.CACerts {
copy.Status.CACert = l.config.CACerts
copy.Status.GeneratedCerts = map[string]string{}
}
copy.Status.CAKey = l.config.CAKey
}
return ©.Status
}