mirror of https://github.com/kubernetes/kops.git
68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
/*
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Copyright 2018 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 server
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import (
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"context"
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"fmt"
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"net"
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"time"
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"k8s.io/kops/node-authorizer/pkg/utils"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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)
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// getClientAddress returns the client address
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func getClientAddress(address string) (string, error) {
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host, _, err := net.SplitHostPort(address)
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return host, err
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}
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// isNodeRegistered checks if the node is already registered with kubernetes
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func isNodeRegistered(ctx context.Context, client kubernetes.Interface, nodename string) (bool, error) {
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var registered bool
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maxInterval := 1000 * time.Millisecond
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maxTime := 10 * time.Second
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// @lets try multiple times
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err := utils.Retry(ctx, maxInterval, maxTime, func() error {
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// @step: get a lit of nodes
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nodes, err := client.CoreV1().Nodes().List(metav1.ListOptions{
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LabelSelector: fmt.Sprintf("kubernetes.io/hostname=%s", nodename),
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})
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if err != nil {
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return err
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}
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// @check if we found a registered node
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if len(nodes.Items) > 0 {
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registered = true
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}
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return nil
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})
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if err != nil {
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return false, err
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}
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return registered, nil
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}
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