forked from kubernetes-sigs/cluster-api
/
clusterapiserver.go
110 lines (91 loc) · 2.67 KB
/
clusterapiserver.go
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/*
Copyright 2018 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 clusterdeployer
import (
"bytes"
"encoding/base64"
"fmt"
"os"
"text/template"
"github.com/golang/glog"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/util/cert"
"k8s.io/client-go/util/cert/triple"
)
var apiServerImage = "gcr.io/k8s-cluster-api/cluster-apiserver:0.0.5"
func init() {
if img, ok := os.LookupEnv("CLUSTER_API_SERVER_IMAGE"); ok {
apiServerImage = img
}
}
type caCertParams struct {
caBundle string
tlsCrt string
tlsKey string
}
func getApiServerCerts() (*caCertParams, error) {
const name = "clusterapi"
const namespace = corev1.NamespaceDefault
caKeyPair, err := triple.NewCA(fmt.Sprintf("%s-certificate-authority", name))
if err != nil {
return nil, fmt.Errorf("failed to create root-ca: %v", err)
}
apiServerKeyPair, err := triple.NewServerKeyPair(
caKeyPair,
fmt.Sprintf("%s.%s.svc", name, namespace),
name,
namespace,
"cluster.local",
[]string{},
[]string{})
if err != nil {
return nil, fmt.Errorf("failed to create apiserver key pair: %v", err)
}
certParams := &caCertParams{
caBundle: base64.StdEncoding.EncodeToString(cert.EncodeCertPEM(caKeyPair.Cert)),
tlsKey: base64.StdEncoding.EncodeToString(cert.EncodePrivateKeyPEM(apiServerKeyPair.Key)),
tlsCrt: base64.StdEncoding.EncodeToString(cert.EncodeCertPEM(apiServerKeyPair.Cert)),
}
return certParams, nil
}
func getApiServerYaml() (string, error) {
tmpl, err := template.New("config").Parse(ClusterAPIAPIServerConfigTemplate)
if err != nil {
return "", err
}
certParms, err := getApiServerCerts()
if err != nil {
glog.Errorf("Error: %v", err)
return "", err
}
type params struct {
Token string
APIServerImage string
ControllerManagerImage string
MachineControllerImage string
CABundle string
TLSCrt string
TLSKey string
}
var tmplBuf bytes.Buffer
err = tmpl.Execute(&tmplBuf, params{
APIServerImage: apiServerImage,
CABundle: certParms.caBundle,
TLSCrt: certParms.tlsCrt,
TLSKey: certParms.tlsKey,
})
if err != nil {
return "", err
}
return string(tmplBuf.Bytes()), nil
}