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prevent create bootstrap secret repeatedly #105

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prevent create bootstrap secret repeatedly #105

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44 changes: 31 additions & 13 deletions pkg/controllers/bootstrap/hub.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,6 @@ package bootstrap

import (
"context"
"fmt"
"math/rand"
"time"

Expand All @@ -25,6 +24,8 @@ import (

var letterRunes_az09 = []rune("abcdefghijklmnopqrstuvwxyz0123456789")

const ControlplaneBootstrapTokenName = "bootstrap-token-controlplane"

func BuildKubeSystemResources(ctx context.Context, config server.Config, kubeClient kubernetes.Interface) error {
// prepare default namespace
if _, err := kubeClient.CoreV1().Namespaces().Create(ctx, &corev1.Namespace{
Expand Down Expand Up @@ -203,24 +204,41 @@ func prepareBootstrapTokenSecret(ctx context.Context, kubeClient kubernetes.Inte
tokenID := randStringRunes(6, letterRunes_az09)
tokenSecret := randStringRunes(16, letterRunes_az09)

secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("bootstrap-token-%s", tokenID),
Labels: map[string]string{"app": "cluster-manager"},
},
Type: corev1.SecretTypeBootstrapToken,
StringData: map[string]string{
sec, err := kubeClient.CoreV1().Secrets(metav1.NamespaceSystem).Get(ctx, ControlplaneBootstrapTokenName, metav1.GetOptions{})
switch {
case errors.IsNotFound(err):
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: ControlplaneBootstrapTokenName,
Labels: map[string]string{"app": "cluster-manager"},
},
Type: corev1.SecretTypeBootstrapToken,
StringData: map[string]string{
"token-id": tokenID,
"token-secret": tokenSecret,
"usage-bootstrap-authentication": "true",
"auth-extra-groups": "system:bootstrappers:managedcluster",
},
}
if _, err := kubeClient.CoreV1().Secrets(metav1.NamespaceSystem).Create(
ctx, secret, metav1.CreateOptions{}); err != nil {
return err
}
case err == nil:
sec.StringData = map[string]string{
"token-id": tokenID,
"token-secret": tokenSecret,
"usage-bootstrap-authentication": "true",
"auth-extra-groups": "system:bootstrappers:managedcluster",
},
}

if _, err := kubeClient.CoreV1().Secrets(metav1.NamespaceSystem).Create(
ctx, secret, metav1.CreateOptions{}); err != nil && !errors.IsAlreadyExists(err) {
}
_, err = kubeClient.CoreV1().Secrets(metav1.NamespaceSystem).Update(ctx, sec, metav1.UpdateOptions{})
if err != nil {
return err
}
default:
return err
}

return nil
}

Expand Down