token.go

Documentation: k8s.io/kubernetes/cmd/kubeadm/app/phases/bootstraptoken/node

     1  /*
     2  Copyright 2017 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package node
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/pkg/errors"
    23  
    24  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    25  	"k8s.io/apimachinery/pkg/util/wait"
    26  	clientset "k8s.io/client-go/kubernetes"
    27  	bootstraputil "k8s.io/cluster-bootstrap/token/util"
    28  
    29  	bootstraptokenv1 "k8s.io/kubernetes/cmd/kubeadm/app/apis/bootstraptoken/v1"
    30  	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
    31  	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
    32  	"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
    33  )
    34  
    35  // CreateNewTokens tries to create a token and fails if one with the same ID already exists
    36  func CreateNewTokens(client clientset.Interface, tokens []bootstraptokenv1.BootstrapToken) error {
    37  	return UpdateOrCreateTokens(client, true, tokens)
    38  }
    39  
    40  // UpdateOrCreateTokens attempts to update a token with the given ID, or create if it does not already exist.
    41  func UpdateOrCreateTokens(client clientset.Interface, failIfExists bool, tokens []bootstraptokenv1.BootstrapToken) error {
    42  
    43  	for _, token := range tokens {
    44  
    45  		secretName := bootstraputil.BootstrapTokenSecretName(token.Token.ID)
    46  		secret, err := client.CoreV1().Secrets(metav1.NamespaceSystem).Get(context.TODO(), secretName, metav1.GetOptions{})
    47  		if secret != nil && err == nil && failIfExists {
    48  			return errors.Errorf("a token with id %q already exists", token.Token.ID)
    49  		}
    50  
    51  		updatedOrNewSecret := bootstraptokenv1.BootstrapTokenToSecret(&token)
    52  
    53  		var lastError error
    54  		err = wait.PollUntilContextTimeout(
    55  			context.Background(),
    56  			kubeadmconstants.KubernetesAPICallRetryInterval,
    57  			kubeadmapi.GetActiveTimeouts().KubernetesAPICall.Duration,
    58  			true, func(_ context.Context) (bool, error) {
    59  				if err := apiclient.CreateOrUpdateSecret(client, updatedOrNewSecret); err != nil {
    60  					lastError = errors.Wrapf(err, "failed to create or update bootstrap token with name %s", secretName)
    61  					return false, nil
    62  				}
    63  				return true, nil
    64  			})
    65  		if err != nil {
    66  			return lastError
    67  		}
    68  	}
    69  	return nil
    70  }
    71
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