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Add certificate rotation

pull/805/head
galal-hussein 2019-09-27 00:38:04 +02:00
parent 439920e517
commit 2dc5ba5bae
1 changed files with 27 additions and 5 deletions
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32
pkg/daemons/control/server.go
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@ -569,7 +569,7 @@ func genClientCerts(config *config.Control, runtime *config.ControlRuntime) erro
return err
}
if _, _, err := certutil.LoadOrGenerateKeyFile(runtime.ClientKubeletKey); err != nil {
if _, _, err := certutil.LoadOrGenerateKeyFile(runtime.ClientKubeletKey, regen); err != nil {
return err
}
@ -614,7 +614,7 @@ func genServerCerts(config *config.Control, runtime *config.ControlRuntime) erro
return err
}
if _, _, err := certutil.LoadOrGenerateKeyFile(runtime.ServingKubeletKey); err != nil {
if _, _, err := certutil.LoadOrGenerateKeyFile(runtime.ServingKubeletKey, regen); err != nil {
return err
}
@ -638,6 +638,11 @@ func genRequestHeaderCerts(config *config.Control, runtime *config.ControlRuntim
}
func createClientCertKey(regen bool, commonName string, organization []string, altNames *certutil.AltNames, extKeyUsage []x509.ExtKeyUsage, caCertFile, caKeyFile, certFile, keyFile string) (bool, error) {
// check for certificate expiration
if !regen {
regen = expired(certFile)
}
if !regen {
if exists(certFile, keyFile) {
return false, nil
@ -663,8 +668,7 @@ func createClientCertKey(regen bool, commonName string, organization []string, a
if err != nil {
return false, err
}
keyBytes, _, err := certutil.LoadOrGenerateKeyFile(keyFile)
keyBytes, _, err := certutil.LoadOrGenerateKeyFile(keyFile, regen)
if err != nil {
return false, err
}
@ -718,7 +722,7 @@ func createSigningCertKey(prefix, certFile, keyFile string) (bool, error) {
return false, nil
}
caKeyBytes, _, err := certutil.LoadOrGenerateKeyFile(keyFile)
caKeyBytes, _, err := certutil.LoadOrGenerateKeyFile(keyFile, false)
if err != nil {
return false, err
}
@ -782,3 +786,21 @@ func setupStorageBackend(argsMap map[string]string, cfg *config.Control) {
argsMap["etcd-keyfile"] = cfg.Storage.KeyFile
}
}
func expired(certFile string) bool {
certBytes, err := ioutil.ReadFile(certFile)
if err != nil {
return false
}
certificates, err := certutil.ParseCertsPEM(certBytes)
if err != nil {
return false
}
expirationDate := certificates[0].NotAfter
diffDays := expirationDate.Sub(time.Now()).Hours() / 24.0
if diffDays <= 90 {
logrus.Infof("certificate %s is about to expire", certFile)
return true
}
return false
}