mirror of https://github.com/k3s-io/k3s
109 lines
3.7 KiB
Go
109 lines
3.7 KiB
Go
/*
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Copyright 2016 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 statusupdater implements interfaces that enable updating the status
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// of API objects.
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package statusupdater
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import (
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"k8s.io/klog"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/types"
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clientset "k8s.io/client-go/kubernetes"
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corelisters "k8s.io/client-go/listers/core/v1"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
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nodeutil "k8s.io/kubernetes/pkg/util/node"
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)
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// NodeStatusUpdater defines a set of operations for updating the
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// VolumesAttached field in the Node Status.
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type NodeStatusUpdater interface {
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// Gets a list of node statuses that should be updated from the actual state
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// of the world and updates them.
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UpdateNodeStatuses() error
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}
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// NewNodeStatusUpdater returns a new instance of NodeStatusUpdater.
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func NewNodeStatusUpdater(
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kubeClient clientset.Interface,
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nodeLister corelisters.NodeLister,
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actualStateOfWorld cache.ActualStateOfWorld) NodeStatusUpdater {
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return &nodeStatusUpdater{
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actualStateOfWorld: actualStateOfWorld,
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nodeLister: nodeLister,
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kubeClient: kubeClient,
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}
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}
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type nodeStatusUpdater struct {
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kubeClient clientset.Interface
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nodeLister corelisters.NodeLister
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actualStateOfWorld cache.ActualStateOfWorld
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}
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func (nsu *nodeStatusUpdater) UpdateNodeStatuses() error {
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// TODO: investigate right behavior if nodeName is empty
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// kubernetes/kubernetes/issues/37777
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nodesToUpdate := nsu.actualStateOfWorld.GetVolumesToReportAttached()
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for nodeName, attachedVolumes := range nodesToUpdate {
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nodeObj, err := nsu.nodeLister.Get(string(nodeName))
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if errors.IsNotFound(err) {
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// If node does not exist, its status cannot be updated.
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// Do nothing so that there is no retry until node is created.
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klog.V(2).Infof(
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"Could not update node status. Failed to find node %q in NodeInformer cache. Error: '%v'",
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nodeName,
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err)
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continue
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} else if err != nil {
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// For all other errors, log error and reset flag statusUpdateNeeded
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// back to true to indicate this node status needs to be updated again.
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klog.V(2).Infof("Error retrieving nodes from node lister. Error: %v", err)
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nsu.actualStateOfWorld.SetNodeStatusUpdateNeeded(nodeName)
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continue
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}
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if err := nsu.updateNodeStatus(nodeName, nodeObj, attachedVolumes); err != nil {
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// If update node status fails, reset flag statusUpdateNeeded back to true
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// to indicate this node status needs to be updated again
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nsu.actualStateOfWorld.SetNodeStatusUpdateNeeded(nodeName)
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klog.V(2).Infof(
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"Could not update node status for %q; re-marking for update. %v",
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nodeName,
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err)
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// We currently always return immediately on error
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return err
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}
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}
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return nil
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}
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func (nsu *nodeStatusUpdater) updateNodeStatus(nodeName types.NodeName, nodeObj *v1.Node, attachedVolumes []v1.AttachedVolume) error {
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node := nodeObj.DeepCopy()
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node.Status.VolumesAttached = attachedVolumes
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_, patchBytes, err := nodeutil.PatchNodeStatus(nsu.kubeClient.CoreV1(), nodeName, nodeObj, node)
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if err != nil {
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return err
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}
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klog.V(4).Infof("Updating status %q for node %q succeeded. VolumesAttached: %v", patchBytes, nodeName, attachedVolumes)
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return nil
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}
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