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Merge pull request #51087 from oracle/for/upstream/master/ccm-instance-exists

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Automatic merge from submit-queue (batch tested with PRs 51174, 51363, 51087, 51382, 51388)

Add InstanceExistsByProviderID to cloud provider interface for CCM

**What this PR does / why we need it**:

Currently, [`MonitorNode()`](02b520f0a4/pkg/controller/cloud/nodecontroller.go (L240)) in the node controller checks with the CCM if a node still exists by calling `ExternalID(nodeName)`. `ExternalID` is supposed to return the provider id of a node which is not supported on every cloud. This means that any clouds who cannot infer the provider id by the node name from a remote location will never remove nodes that no longer exist. 


**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #50985

**Special notes for your reviewer**:

We'll want to create a subsequent issue to track the implementation of these two new methods in the cloud providers.

**Release note**:

```release-note
Adds `InstanceExists` and `InstanceExistsByProviderID` to cloud provider interface for the cloud controller manager
```

/cc @wlan0 @thockin @andrewsykim @luxas @jhorwit2

/area cloudprovider
/sig cluster-lifecycle
This commit is contained in:
Kubernetes Submit Queue
2017-08-26 06:43:30 -07:00
committed by GitHub
parent 41a06d1fbb cf75c49883
commit 27fbb68f18
13 changed files with 244 additions and 27 deletions
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67
pkg/controller/cloud/node_controller.go
View File

@@ -237,26 +237,36 @@ func (cnc *CloudNodeController) MonitorNode() {
if currentReadyCondition.Status != v1.ConditionTrue {
// Check with the cloud provider to see if the node still exists. If it
// doesn't, delete the node immediately.
if _, err := instances.ExternalID(types.NodeName(node.Name)); err != nil {
if err == cloudprovider.InstanceNotFound {
glog.V(2).Infof("Deleting node no longer present in cloud provider: %s", node.Name)
ref := &v1.ObjectReference{
Kind: "Node",
Name: node.Name,
UID: types.UID(node.UID),
Namespace: "",
}
glog.V(2).Infof("Recording %s event message for node %s", "DeletingNode", node.Name)
cnc.recorder.Eventf(ref, v1.EventTypeNormal, fmt.Sprintf("Deleting Node %v because it's not present according to cloud provider", node.Name), "Node %s event: %s", node.Name, "DeletingNode")
go func(nodeName string) {
defer utilruntime.HandleCrash()
if err := cnc.kubeClient.CoreV1().Nodes().Delete(node.Name, nil); err != nil {
glog.Errorf("unable to delete node %q: %v", node.Name, err)
}
}(node.Name)
}
glog.Errorf("Error getting node data from cloud: %v", err)
exists, err := ensureNodeExistsByProviderIDOrExternalID(instances, node)
if err != nil {
glog.Errorf("Error getting data for node %s from cloud: %v", node.Name, err)
continue
}
if exists {
// Continue checking the remaining nodes since the current one is fine.
continue
}
glog.V(2).Infof("Deleting node since it is no longer present in cloud provider: %s", node.Name)
ref := &v1.ObjectReference{
Kind: "Node",
Name: node.Name,
UID: types.UID(node.UID),
Namespace: "",
}
glog.V(2).Infof("Recording %s event message for node %s", "DeletingNode", node.Name)
cnc.recorder.Eventf(ref, v1.EventTypeNormal, fmt.Sprintf("Deleting Node %v because it's not present according to cloud provider", node.Name), "Node %s event: %s", node.Name, "DeletingNode")
go func(nodeName string) {
defer utilruntime.HandleCrash()
if err := cnc.kubeClient.CoreV1().Nodes().Delete(nodeName, nil); err != nil {
glog.Errorf("unable to delete node %q: %v", nodeName, err)
}
}(node.Name)
}
}
}
@@ -384,6 +394,25 @@ func excludeTaintFromList(taints []v1.Taint, toExclude v1.Taint) []v1.Taint {
return newTaints
}
// ensureNodeExistsByProviderIDOrExternalID first checks if the instance exists by the provider id and then by calling external id with node name
func ensureNodeExistsByProviderIDOrExternalID(instances cloudprovider.Instances, node *v1.Node) (bool, error) {
exists, err := instances.InstanceExistsByProviderID(node.Spec.ProviderID)
if err != nil {
providerIDErr := err
_, err = instances.ExternalID(types.NodeName(node.Name))
if err == nil {
return true, nil
}
if err == cloudprovider.InstanceNotFound {
return false, nil
}
return false, fmt.Errorf("InstanceExistsByProviderID: Error fetching by providerID: %v Error fetching by NodeName: %v", providerIDErr, err)
}
return exists, nil
}
func getNodeAddressesByProviderIDOrName(instances cloudprovider.Instances, node *v1.Node) ([]v1.NodeAddress, error) {
nodeAddresses, err := instances.NodeAddressesByProviderID(node.Spec.ProviderID)
if err != nil {