76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
/*
|
|
Copyright 2016 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 node
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
|
|
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
|
|
clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
|
|
"k8s.io/kubernetes/pkg/kubelet/util/csr"
|
|
certutil "k8s.io/kubernetes/pkg/util/cert"
|
|
)
|
|
|
|
// PerformTLSBootstrap executes a node certificate signing request.
|
|
func PerformTLSBootstrap(cfg *clientcmdapi.Config) error {
|
|
hostName, err := os.Hostname()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
name := types.NodeName(hostName)
|
|
|
|
rc, err := clientcmd.NewDefaultClientConfig(*cfg, &clientcmd.ConfigOverrides{}).ClientConfig()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
c, err := clientset.NewForConfig(rc)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fmt.Println("[csr] Created API client to obtain unique certificate for this node, generating keys and certificate signing request")
|
|
|
|
key, err := certutil.MakeEllipticPrivateKeyPEM()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to generate private key [%v]", err)
|
|
}
|
|
|
|
// Make sure there are no other nodes in the cluster with identical node name.
|
|
if err := checkForNodeNameDuplicates(c); err != nil {
|
|
return err
|
|
}
|
|
|
|
cert, err := csr.RequestNodeCertificate(c.Certificates().CertificateSigningRequests(), key, name)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to request signed certificate from the API server [%v]", err)
|
|
}
|
|
fmt.Printf("[csr] Received signed certificate from the API server")
|
|
fmt.Println("[csr] Generating kubelet configuration")
|
|
|
|
cfg.AuthInfos["kubelet"] = &clientcmdapi.AuthInfo{
|
|
ClientKeyData: key,
|
|
ClientCertificateData: cert,
|
|
}
|
|
cfg.Contexts["kubelet"] = &clientcmdapi.Context{
|
|
AuthInfo: "kubelet",
|
|
Cluster: cfg.Contexts[cfg.CurrentContext].Cluster,
|
|
}
|
|
cfg.CurrentContext = "kubelet"
|
|
return nil
|
|
}
|