Golang keymutex.NewKeyMutex函數代碼示例

func (plugin *cinderPlugin) Init(host volume.VolumeHost) error {
	plugin.host = host
	plugin.volumeLocks = keymutex.NewKeyMutex()
	return nil
}

	"k8s.io/kubernetes/pkg/util/sets"
	"k8s.io/kubernetes/pkg/volume"
)

const (
	diskPartitionSuffix = ""
	diskXVDPath         = "/dev/xvd"
	diskXVDPattern      = "/dev/xvd*"
	maxChecks           = 60
	maxRetries          = 10
	checkSleepDuration  = time.Second
	errorSleepDuration  = 5 * time.Second
)

// Singleton key mutex for keeping attach/detach operations for the same PD atomic
var attachDetachMutex = keymutex.NewKeyMutex()

type AWSDiskUtil struct{}

// Attaches a disk to the current kubelet.
// Mounts the disk to it's global path.
func (diskUtil *AWSDiskUtil) AttachAndMountDisk(b *awsElasticBlockStoreBuilder, globalPDPath string) error {
	glog.V(5).Infof("AttachAndMountDisk(...) called for PD %q. Will block for existing operations, if any. (globalPDPath=%q)\r\n", b.volumeID, globalPDPath)

	// Block execution until any pending detach operations for this PD have completed
	attachDetachMutex.LockKey(b.volumeID)
	defer attachDetachMutex.UnlockKey(b.volumeID)

	glog.V(5).Infof("AttachAndMountDisk(...) called for PD %q. Awake and ready to execute. (globalPDPath=%q)\r\n", b.volumeID, globalPDPath)

	xvdBefore, err := filepath.Glob(diskXVDPattern)

type azureDiskAttacher struct {
	host          volume.VolumeHost
	azureProvider azureCloudProvider
}

var _ volume.Attacher = &azureDiskAttacher{}

var _ volume.AttachableVolumePlugin = &azureDataDiskPlugin{}

const (
	checkSleepDuration = time.Second
)

// acquire lock to get an lun number
var getLunMutex = keymutex.NewKeyMutex()

// NewAttacher initializes an Attacher
func (plugin *azureDataDiskPlugin) NewAttacher() (volume.Attacher, error) {
	azure, err := getAzureCloudProvider(plugin.host.GetCloudProvider())
	if err != nil {
		glog.V(4).Infof("failed to get azure provider")
		return nil, err
	}

	return &azureDiskAttacher{
		host:          plugin.host,
		azureProvider: azure,
	}, nil
}

func (plugin *azureDataDiskPlugin) Init(host volume.VolumeHost) error {
	plugin.host = host
	plugin.volumeLocks = keymutex.NewKeyMutex()
	return nil
}