func nodeExistsInCloudProvider(cloud cloudprovider.Interface, nodeName string) (bool, error) {
instances, ok := cloud.Instances()
if !ok {
return false, fmt.Errorf("%v", ErrCloudInstance)
}
if _, err := instances.ExternalID(nodeName); err != nil {
if err == cloudprovider.InstanceNotFound {
return false, nil
}
return false, err
}
return true, nil
}
// getNodeName returns the node name according to the cloud provider
// if cloud provider is specified. Otherwise, returns the hostname of the node.
func getNodeName(cloud cloudprovider.Interface, hostname string) (types.NodeName, error) {
if cloud == nil {
return types.NodeName(hostname), nil
}
instances, ok := cloud.Instances()
if !ok {
return "", fmt.Errorf("failed to get instances from cloud provider")
}
nodeName, err := instances.CurrentNodeName(hostname)
if err != nil {
return "", fmt.Errorf("error fetching current node name from cloud provider: %v", err)
}
glog.V(2).Infof("cloud provider determined current node name to be %s", nodeName)
return nodeName, nil
}