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58 lines
2.1 KiB
Go
58 lines
2.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package node
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import (
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"fmt"
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kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
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clientcmdapi "k8s.io/kubernetes/pkg/client/unversioned/clientcmd/api"
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"k8s.io/kubernetes/pkg/kubelet/util/csr"
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certutil "k8s.io/kubernetes/pkg/util/cert"
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)
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// PerformTLSBootstrap executes a certificate signing request with the
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// provided connection details.
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func PerformTLSBootstrap(connection *ConnectionDetails) (*clientcmdapi.Config, error) {
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csrClient := connection.CertClient.CertificateSigningRequests()
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fmt.Println("[csr] Created API client to obtain unique certificate for this node, generating keys and certificate signing request")
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key, err := certutil.MakeEllipticPrivateKeyPEM()
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if err != nil {
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return nil, fmt.Errorf("failed to generating private key [%v]", err)
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}
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cert, err := csr.RequestNodeCertificate(csrClient, key, connection.NodeName)
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if err != nil {
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return nil, fmt.Errorf("failed to request signed certificate from the API server [%v]", err)
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}
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fmtCert, err := certutil.FormatBytesCert(cert)
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if err != nil {
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return nil, fmt.Errorf("failed to format certificate [%v]", err)
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}
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fmt.Printf("[csr] Received signed certificate from the API server:\n%s\n", fmtCert)
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fmt.Println("[csr] Generating kubelet configuration")
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bareClientConfig := kubeadmutil.CreateBasicClientConfig("kubernetes", connection.Endpoint, connection.CACert)
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finalConfig := kubeadmutil.MakeClientConfigWithCerts(
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bareClientConfig, "kubernetes", fmt.Sprintf("kubelet-%s", connection.NodeName),
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key, cert,
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)
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return finalConfig, nil
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}
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