132 lines
4.8 KiB
Go
132 lines
4.8 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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"fmt"
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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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nodeutil "k8s.io/component-helpers/node/util"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
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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(logger klog.Logger) error
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// Update any pending status change for the given node
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UpdateNodeStatusForNode(logger klog.Logger, nodeName types.NodeName) 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(logger klog.Logger) error {
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var nodeIssues int
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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(logger)
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for nodeName, attachedVolumes := range nodesToUpdate {
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err := nsu.processNodeVolumes(logger, nodeName, attachedVolumes)
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if err != nil {
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nodeIssues += 1
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}
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}
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if nodeIssues > 0 {
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return fmt.Errorf("unable to update %d nodes", nodeIssues)
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}
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return nil
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}
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func (nsu *nodeStatusUpdater) UpdateNodeStatusForNode(logger klog.Logger, nodeName types.NodeName) error {
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needsUpdate, attachedVolumes := nsu.actualStateOfWorld.GetVolumesToReportAttachedForNode(logger, nodeName)
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if !needsUpdate {
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return nil
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}
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return nsu.processNodeVolumes(logger, nodeName, attachedVolumes)
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}
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func (nsu *nodeStatusUpdater) processNodeVolumes(logger klog.Logger, nodeName types.NodeName, attachedVolumes []v1.AttachedVolume) error {
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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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logger.V(2).Info(
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"Could not update node status. Failed to find node in NodeInformer cache", "node", klog.KRef("", string(nodeName)), "err", err)
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return nil
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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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logger.V(2).Info("Error retrieving nodes from node lister", "err", err)
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nsu.actualStateOfWorld.SetNodeStatusUpdateNeeded(logger, nodeName)
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return err
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}
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err = nsu.updateNodeStatus(logger, nodeName, nodeObj, attachedVolumes)
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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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logger.V(2).Info(
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"Could not update node status, node does not exist - skipping", "node", klog.KObj(nodeObj))
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return nil
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} else if 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(logger, nodeName)
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logger.V(2).Info("Could not update node status; re-marking for update", "node", klog.KObj(nodeObj), "err", err)
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return err
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}
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return nil
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}
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func (nsu *nodeStatusUpdater) updateNodeStatus(logger klog.Logger, 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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logger.V(4).Info("Updating status for node succeeded", "node", klog.KObj(node), "patchBytes", patchBytes, "attachedVolumes", attachedVolumes)
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return nil
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}
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