mirror of https://github.com/k3s-io/k3s
126 lines
3.6 KiB
Go
126 lines
3.6 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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"encoding/json"
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"fmt"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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kcache "k8s.io/kubernetes/pkg/client/cache"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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"k8s.io/kubernetes/pkg/controller/volume/attachdetach/cache"
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"k8s.io/kubernetes/pkg/util/strategicpatch"
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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 internalclientset.Interface,
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nodeInformer kcache.SharedInformer,
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actualStateOfWorld cache.ActualStateOfWorld) NodeStatusUpdater {
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return &nodeStatusUpdater{
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actualStateOfWorld: actualStateOfWorld,
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nodeInformer: nodeInformer,
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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 internalclientset.Interface
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nodeInformer kcache.SharedInformer
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actualStateOfWorld cache.ActualStateOfWorld
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}
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func (nsu *nodeStatusUpdater) UpdateNodeStatuses() error {
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nodesToUpdate := nsu.actualStateOfWorld.GetVolumesToReportAttached()
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for nodeName, attachedVolumes := range nodesToUpdate {
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nodeObj, exists, err := nsu.nodeInformer.GetStore().GetByKey(string(nodeName))
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if nodeObj == nil || !exists || err != nil {
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// If node does not exist, its status cannot be updated, log error and move on.
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glog.V(5).Infof(
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"Could not update node status. Failed to find node %q in NodeInformer cache. %v",
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nodeName,
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err)
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continue
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}
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node, ok := nodeObj.(*api.Node)
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if !ok || node == nil {
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return fmt.Errorf(
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"failed to cast %q object %#v to Node",
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nodeName,
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nodeObj)
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}
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oldData, err := json.Marshal(node)
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if err != nil {
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return fmt.Errorf(
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"failed to Marshal oldData for node %q. %v",
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nodeName,
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err)
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}
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node.Status.VolumesAttached = attachedVolumes
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newData, err := json.Marshal(node)
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if err != nil {
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return fmt.Errorf(
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"failed to Marshal newData for node %q. %v",
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nodeName,
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err)
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}
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patchBytes, err :=
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strategicpatch.CreateStrategicMergePatch(oldData, newData, node)
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if err != nil {
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return fmt.Errorf(
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"failed to CreateStrategicMergePatch for node %q. %v",
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nodeName,
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err)
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}
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_, err = nsu.kubeClient.Core().Nodes().PatchStatus(string(nodeName), patchBytes)
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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 udpated again
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nsu.actualStateOfWorld.SetNodeStatusUpdateNeeded(nodeName)
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return fmt.Errorf(
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"failed to kubeClient.Core().Nodes().Patch for node %q. %v",
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nodeName,
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err)
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}
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glog.V(3).Infof(
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"Updating status for node %q succeeded. patchBytes: %q",
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nodeName,
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string(patchBytes))
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}
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return nil
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}
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