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listener_controller.go
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/
listener_controller.go
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package dynamiclistener
import (
"context"
"net/http"
"github.com/rancher/norman/types/convert"
"github.com/rancher/rancher/pkg/cert"
"github.com/rancher/rancher/pkg/dynamiclistener"
"github.com/rancher/rancher/pkg/settings"
"github.com/rancher/types/apis/core/v1"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/config"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
)
type Controller struct {
listenConfig v3.ListenConfigInterface
listenConfigLister v3.ListenConfigLister
secrets v1.SecretInterface
server *dynamiclistener.Server
}
type storageUpdater interface {
Update(*v3.ListenConfig) (*v3.ListenConfig, error)
}
type storage struct {
storageUpdater
v3.ListenConfigLister
}
func Start(ctx context.Context, context *config.ScaledContext, httpPort, httpsPort int, handler http.Handler) {
s := storage{
storageUpdater: context.Management.ListenConfigs(""),
ListenConfigLister: context.Management.ListenConfigs("").Controller().Lister(),
}
c := &Controller{
server: dynamiclistener.NewServer(ctx, s, handler, httpPort, httpsPort),
secrets: context.Core.Secrets(""),
listenConfig: context.Management.ListenConfigs(""),
listenConfigLister: context.Management.ListenConfigs("").Controller().Lister(),
}
context.Management.ListenConfigs("").AddHandler("listener", c.sync)
go func() {
<-ctx.Done()
c.server.Shutdown()
}()
}
func (c *Controller) sync(key string, listener *v3.ListenConfig) error {
if listener == nil {
return nil
}
if listener.Enabled {
return c.enable(listener)
}
c.server.Disable(listener)
allConfigs, err := c.listenConfigLister.List("", labels.Everything())
if err != nil {
return err
}
var lastConfig *v3.ListenConfig
for _, config := range allConfigs {
if !config.Enabled || config.DeletionTimestamp != nil {
continue
}
if lastConfig == nil || lastConfig.CreationTimestamp.Before(&config.CreationTimestamp) {
lastConfig = config
}
}
if lastConfig != nil {
return c.enable(listener)
}
return nil
}
func (c *Controller) enable(listener *v3.ListenConfig) error {
current, err := c.server.Enable(listener)
if err != nil {
return err
}
if current {
return c.updateCurrent(listener)
}
return nil
}
func (c *Controller) updateCurrent(listener *v3.ListenConfig) error {
settings.CACerts.Set(listener.CACerts)
if listener.Key != "" && listener.CACerts != "" && listener.Cert != "" {
certInfo, err := cert.Info(listener.Cert+"\n"+listener.CACerts, listener.Key)
if err != nil {
return err
}
if certInfo.SerialNumber != listener.SerialNumber {
copy := listener.DeepCopy()
copy.CertFingerprint = certInfo.Fingerprint
copy.CN = certInfo.CN
copy.Version = certInfo.Version
copy.ExpiresAt = convert.ToString(certInfo.ExpiresAt)
copy.Issuer = certInfo.Issuer
copy.IssuedAt = convert.ToString(certInfo.IssuedAt)
copy.Algorithm = certInfo.Algorithm
copy.SerialNumber = certInfo.SerialNumber
copy.KeySize = certInfo.KeySize
copy.SubjectAlternativeNames = certInfo.SubjectAlternativeNames
_, err := c.listenConfig.Update(copy)
if err != nil {
return err
}
}
}
return c.saveCACertToSecret(listener.CAKey, listener.CACert)
}
func (c *Controller) saveCACertToSecret(key, cert string) error {
if key == "" || cert == "" {
return nil
}
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: "tls-rancher",
Namespace: "cattle-system",
},
StringData: map[string]string{
"tls.key": key,
"tls.crt": cert,
},
Type: corev1.SecretTypeTLS,
}
existing, err := c.secrets.GetNamespaced(secret.Namespace, secret.Name, metav1.GetOptions{})
if errors.IsNotFound(err) {
_, err = c.secrets.Create(secret)
return err
} else if err != nil {
return err
}
existing.StringData = secret.StringData
_, err = c.secrets.Update(existing)
return err
}