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https://github.com/k3s-io/kubernetes.git
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26c9965a97
During the control plane joins, sometimes the control plane returns an expected error when trying to download the `kubeadm-config` ConfigMap. This is a workaround for this issue until the root cause is completely identified and fixed. Ideally, this commit should be reverted in the near future.
61 lines
2.3 KiB
Go
61 lines
2.3 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 kubelet
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import (
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"fmt"
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"github.com/pkg/errors"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/version"
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clientset "k8s.io/client-go/kubernetes"
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kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
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)
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// EnableDynamicConfigForNode updates the Node's ConfigSource to enable Dynamic Kubelet Configuration, depending on what version the kubelet is
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// Used at "kubeadm init", "kubeadm join" and "kubeadm upgrade" time
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func EnableDynamicConfigForNode(client clientset.Interface, nodeName string, kubeletVersion *version.Version) error {
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configMapName := kubeadmconstants.GetKubeletConfigMapName(kubeletVersion)
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fmt.Printf("[kubelet] Enabling Dynamic Kubelet Config for Node %q; config sourced from ConfigMap %q in namespace %s\n",
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nodeName, configMapName, metav1.NamespaceSystem)
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fmt.Println("[kubelet] WARNING: The Dynamic Kubelet Config feature is beta, but off by default. It hasn't been well-tested yet at this stage, use with caution.")
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_, err := apiclient.GetConfigMapWithRetry(client, metav1.NamespaceSystem, configMapName)
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if err != nil {
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return errors.Wrap(err, "couldn't get the kubelet configuration ConfigMap")
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}
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// Loop on every falsy return. Return with an error if raised. Exit successfully if true is returned.
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return apiclient.PatchNode(client, nodeName, func(n *v1.Node) {
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patchNodeForDynamicConfig(n, configMapName)
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})
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}
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func patchNodeForDynamicConfig(n *v1.Node, configMapName string) {
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n.Spec.ConfigSource = &v1.NodeConfigSource{
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ConfigMap: &v1.ConfigMapNodeConfigSource{
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Name: configMapName,
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Namespace: metav1.NamespaceSystem,
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KubeletConfigKey: kubeadmconstants.KubeletBaseConfigurationConfigMapKey,
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},
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}
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}
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