func (rc *reconciler) reconciliationLoopFunc() func() {
return func() {
// Detaches are triggered before attaches so that volumes referenced by
// pods that are rescheduled to a different node are detached first.
// Ensure volumes that should be detached are detached.
for _, attachedVolume := range rc.actualStateOfWorld.GetAttachedVolumes() {
if !rc.desiredStateOfWorld.VolumeExists(
attachedVolume.VolumeName, attachedVolume.NodeName) {
// Volume exists in actual state of world but not desired
// Mark desire to detach
timeElapsed, err := rc.actualStateOfWorld.MarkDesireToDetach(attachedVolume.VolumeName, attachedVolume.NodeName)
if err != nil {
glog.Errorf("Unexpected error actualStateOfWorld.MarkDesireToDetach(): %v", err)
}
// Update Node Status to indicate volume is no longer safe to mount.
err = rc.nodeStatusUpdater.UpdateNodeStatuses()
if err != nil {
// Skip detaching this volume if unable to update node status
glog.Infof("UpdateNodeStatuses failed with: %v", err)
continue
}
if !attachedVolume.MountedByNode {
glog.V(5).Infof("Attempting to start DetachVolume for volume %q from node %q", attachedVolume.VolumeName, attachedVolume.NodeName)
err := rc.attacherDetacher.DetachVolume(attachedVolume.AttachedVolume, true /* verifySafeToDetach */, rc.actualStateOfWorld)
if err == nil {
glog.Infof("Started DetachVolume for volume %q from node %q", attachedVolume.VolumeName, attachedVolume.NodeName)
}
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.DetachVolume failed to start for volume %q (spec.Name: %q) from node %q with err: %v",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name(),
attachedVolume.NodeName,
err)
}
} else {
// If volume is not safe to detach (is mounted) wait a max amount of time before detaching anyway.
if timeElapsed > rc.maxWaitForUnmountDuration {
glog.V(5).Infof("Attempting to start DetachVolume for volume %q from node %q. Volume is not safe to detach, but maxWaitForUnmountDuration expired.", attachedVolume.VolumeName, attachedVolume.NodeName)
err := rc.attacherDetacher.DetachVolume(attachedVolume.AttachedVolume, false /* verifySafeToDetach */, rc.actualStateOfWorld)
if err == nil {
glog.Infof("Started DetachVolume for volume %q from node %q due to maxWaitForUnmountDuration expiry.", attachedVolume.VolumeName, attachedVolume.NodeName)
}
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.DetachVolume failed to start (maxWaitForUnmountDuration expiry) for volume %q (spec.Name: %q) from node %q with err: %v",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name(),
attachedVolume.NodeName,
err)
}
}
}
}
}
// Ensure volumes that should be attached are attached.
for _, volumeToAttach := range rc.desiredStateOfWorld.GetVolumesToAttach() {
if rc.actualStateOfWorld.VolumeNodeExists(
volumeToAttach.VolumeName, volumeToAttach.NodeName) {
// Volume/Node exists, touch it to reset detachRequestedTime
glog.V(12).Infof("Volume %q/Node %q is attached--touching.", volumeToAttach.VolumeName, volumeToAttach.NodeName)
_, err := rc.actualStateOfWorld.AddVolumeNode(
volumeToAttach.VolumeSpec, volumeToAttach.NodeName, "" /* devicePath */)
if err != nil {
glog.Errorf("Unexpected error on actualStateOfWorld.AddVolumeNode(): %v", err)
}
} else {
// Volume/Node doesn't exist, spawn a goroutine to attach it
glog.V(5).Infof("Attempting to start AttachVolume for volume %q to node %q", volumeToAttach.VolumeName, volumeToAttach.NodeName)
err := rc.attacherDetacher.AttachVolume(volumeToAttach.VolumeToAttach, rc.actualStateOfWorld)
if err == nil {
glog.Infof("Started AttachVolume for volume %q to node %q", volumeToAttach.VolumeName, volumeToAttach.NodeName)
}
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.AttachVolume failed to start for volume %q (spec.Name: %q) to node %q with err: %v",
volumeToAttach.VolumeName,
volumeToAttach.VolumeSpec.Name(),
volumeToAttach.NodeName,
err)
}
}
}
// Update Node Status
err := rc.nodeStatusUpdater.UpdateNodeStatuses()
if err != nil {
glog.Infof("UpdateNodeStatuses failed with: %v", err)
}
}
}
func (rc *reconciler) reconcile() {
// Detaches are triggered before attaches so that volumes referenced by
// pods that are rescheduled to a different node are detached first.
// Ensure volumes that should be detached are detached.
for _, attachedVolume := range rc.actualStateOfWorld.GetAttachedVolumes() {
if !rc.desiredStateOfWorld.VolumeExists(
attachedVolume.VolumeName, attachedVolume.NodeName) {
// Set the detach request time
elapsedTime, err := rc.actualStateOfWorld.SetDetachRequestTime(attachedVolume.VolumeName, attachedVolume.NodeName)
if err != nil {
glog.Errorf("Cannot trigger detach because it fails to set detach request time with error %v", err)
continue
}
// Check whether timeout has reached the maximum waiting time
timeout := elapsedTime > rc.maxWaitForUnmountDuration
// Check whether volume is still mounted. Skip detach if it is still mounted unless timeout
if attachedVolume.MountedByNode && !timeout {
glog.V(12).Infof("Cannot trigger detach for volume %q on node %q because volume is still mounted",
attachedVolume.VolumeName,
attachedVolume.NodeName)
continue
}
// Before triggering volume detach, mark volume as detached and update the node status
// If it fails to update node status, skip detach volume
rc.actualStateOfWorld.RemoveVolumeFromReportAsAttached(attachedVolume.VolumeName, attachedVolume.NodeName)
// Update Node Status to indicate volume is no longer safe to mount.
err = rc.nodeStatusUpdater.UpdateNodeStatuses()
if err != nil {
// Skip detaching this volume if unable to update node status
glog.Errorf("UpdateNodeStatuses failed while attempting to report volume %q as attached to node %q with: %v ",
attachedVolume.VolumeName,
attachedVolume.NodeName,
err)
continue
}
// Trigger detach volume which requires verifing safe to detach step
// If timeout is true, skip verifySafeToDetach check
glog.V(5).Infof("Attempting to start DetachVolume for volume %q from node %q", attachedVolume.VolumeName, attachedVolume.NodeName)
verifySafeToDetach := !timeout
err = rc.attacherDetacher.DetachVolume(attachedVolume.AttachedVolume, verifySafeToDetach, rc.actualStateOfWorld)
if err == nil {
if !timeout {
glog.Infof("Started DetachVolume for volume %q from node %q", attachedVolume.VolumeName, attachedVolume.NodeName)
} else {
glog.Infof("Started DetachVolume for volume %q from node %q. This volume is not safe to detach, but maxWaitForUnmountDuration %v expired, force detaching",
attachedVolume.VolumeName,
attachedVolume.NodeName,
rc.maxWaitForUnmountDuration)
}
}
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.DetachVolume failed to start for volume %q (spec.Name: %q) from node %q with err: %v",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name(),
attachedVolume.NodeName,
err)
}
}
}
// Ensure volumes that should be attached are attached.
for _, volumeToAttach := range rc.desiredStateOfWorld.GetVolumesToAttach() {
if rc.actualStateOfWorld.VolumeNodeExists(
volumeToAttach.VolumeName, volumeToAttach.NodeName) {
// Volume/Node exists, touch it to reset detachRequestedTime
glog.V(5).Infof("Volume %q/Node %q is attached--touching.", volumeToAttach.VolumeName, volumeToAttach.NodeName)
rc.actualStateOfWorld.ResetDetachRequestTime(volumeToAttach.VolumeName, volumeToAttach.NodeName)
} else {
// Volume/Node doesn't exist, spawn a goroutine to attach it
glog.V(5).Infof("Attempting to start AttachVolume for volume %q to node %q", volumeToAttach.VolumeName, volumeToAttach.NodeName)
err := rc.attacherDetacher.AttachVolume(volumeToAttach.VolumeToAttach, rc.actualStateOfWorld)
if err == nil {
glog.Infof("Started AttachVolume for volume %q to node %q", volumeToAttach.VolumeName, volumeToAttach.NodeName)
}
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.AttachVolume failed to start for volume %q (spec.Name: %q) to node %q with err: %v",
volumeToAttach.VolumeName,
volumeToAttach.VolumeSpec.Name(),
volumeToAttach.NodeName,
err)
}
}
}
// Update Node Status
err := rc.nodeStatusUpdater.UpdateNodeStatuses()
if err != nil {
glog.Infof("UpdateNodeStatuses failed with: %v", err)
}
}
func (rc *reconciler) reconcile() {
// Unmounts are triggered before mounts so that a volume that was
// referenced by a pod that was deleted and is now referenced by another
// pod is unmounted from the first pod before being mounted to the new
// pod.
// Ensure volumes that should be unmounted are unmounted.
for _, mountedVolume := range rc.actualStateOfWorld.GetMountedVolumes() {
if !rc.desiredStateOfWorld.PodExistsInVolume(mountedVolume.PodName, mountedVolume.VolumeName) {
// Volume is mounted, unmount it
glog.V(12).Infof("Attempting to start UnmountVolume for volume %q (spec.Name: %q) from pod %q (UID: %q).",
mountedVolume.VolumeName,
mountedVolume.OuterVolumeSpecName,
mountedVolume.PodName,
mountedVolume.PodUID)
err := rc.operationExecutor.UnmountVolume(
mountedVolume.MountedVolume, rc.actualStateOfWorld)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists and exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.UnmountVolume failed for volume %q (spec.Name: %q) pod %q (UID: %q) controllerAttachDetachEnabled: %v with err: %v",
mountedVolume.VolumeName,
mountedVolume.OuterVolumeSpecName,
mountedVolume.PodName,
mountedVolume.PodUID,
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
glog.Infof("UnmountVolume operation started for volume %q (spec.Name: %q) from pod %q (UID: %q).",
mountedVolume.VolumeName,
mountedVolume.OuterVolumeSpecName,
mountedVolume.PodName,
mountedVolume.PodUID)
}
}
}
// Ensure volumes that should be attached/mounted are attached/mounted.
for _, volumeToMount := range rc.desiredStateOfWorld.GetVolumesToMount() {
volMounted, devicePath, err := rc.actualStateOfWorld.PodExistsInVolume(volumeToMount.PodName, volumeToMount.VolumeName)
volumeToMount.DevicePath = devicePath
if cache.IsVolumeNotAttachedError(err) {
if rc.controllerAttachDetachEnabled || !volumeToMount.PluginIsAttachable {
// Volume is not attached (or doesn't implement attacher), kubelet attach is disabled, wait
// for controller to finish attaching volume.
glog.V(12).Infof("Attempting to start VerifyControllerAttachedVolume for volume %q (spec.Name: %q) pod %q (UID: %q)",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID)
err := rc.operationExecutor.VerifyControllerAttachedVolume(
volumeToMount.VolumeToMount,
rc.nodeName,
rc.actualStateOfWorld)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists and exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.VerifyControllerAttachedVolume failed for volume %q (spec.Name: %q) pod %q (UID: %q) controllerAttachDetachEnabled: %v with err: %v",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID,
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
glog.Infof("VerifyControllerAttachedVolume operation started for volume %q (spec.Name: %q) pod %q (UID: %q)",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID)
}
} else {
// Volume is not attached to node, kubelet attach is enabled, volume implements an attacher,
// so attach it
volumeToAttach := operationexecutor.VolumeToAttach{
VolumeName: volumeToMount.VolumeName,
VolumeSpec: volumeToMount.VolumeSpec,
NodeName: rc.nodeName,
}
glog.V(12).Infof("Attempting to start AttachVolume for volume %q (spec.Name: %q) pod %q (UID: %q)",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID)
err := rc.operationExecutor.AttachVolume(volumeToAttach, rc.actualStateOfWorld)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists and exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.AttachVolume failed for volume %q (spec.Name: %q) pod %q (UID: %q) controllerAttachDetachEnabled: %v with err: %v",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID,
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
glog.Infof("AttachVolume operation started for volume %q (spec.Name: %q) pod %q (UID: %q)",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID)
}
}
} else if !volMounted || cache.IsRemountRequiredError(err) {
// Volume is not mounted, or is already mounted, but requires remounting
remountingLogStr := ""
if cache.IsRemountRequiredError(err) {
remountingLogStr = "Volume is already mounted to pod, but remount was requested."
}
glog.V(12).Infof("Attempting to start MountVolume for volume %q (spec.Name: %q) to pod %q (UID: %q). %s",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID,
remountingLogStr)
err := rc.operationExecutor.MountVolume(
rc.waitForAttachTimeout,
volumeToMount.VolumeToMount,
rc.actualStateOfWorld)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists and exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.MountVolume failed for volume %q (spec.Name: %q) pod %q (UID: %q) controllerAttachDetachEnabled: %v with err: %v",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID,
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
logMsg := fmt.Sprintf("MountVolume operation started for volume %q (spec.Name: %q) to pod %q (UID: %q). %s",
volumeToMount.VolumeName,
volumeToMount.VolumeSpec.Name(),
volumeToMount.PodName,
volumeToMount.Pod.UID,
remountingLogStr)
if remountingLogStr == "" {
glog.V(1).Infof(logMsg)
} else {
glog.V(5).Infof(logMsg)
}
}
}
}
// Ensure devices that should be detached/unmounted are detached/unmounted.
for _, attachedVolume := range rc.actualStateOfWorld.GetUnmountedVolumes() {
if !rc.desiredStateOfWorld.VolumeExists(attachedVolume.VolumeName) {
if attachedVolume.GloballyMounted {
// Volume is globally mounted to device, unmount it
glog.V(12).Infof("Attempting to start UnmountDevice for volume %q (spec.Name: %q)",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name())
err := rc.operationExecutor.UnmountDevice(
attachedVolume.AttachedVolume, rc.actualStateOfWorld, rc.mounter)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists and exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.UnmountDevice failed for volume %q (spec.Name: %q) controllerAttachDetachEnabled: %v with err: %v",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name(),
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
glog.Infof("UnmountDevice operation started for volume %q (spec.Name: %q)",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name())
}
} else {
// Volume is attached to node, detach it
if rc.controllerAttachDetachEnabled || !attachedVolume.PluginIsAttachable {
// Kubelet not responsible for detaching or this volume has a non-attachable volume plugin,
// so just remove it to actualStateOfWorld without attach.
rc.actualStateOfWorld.MarkVolumeAsDetached(
attachedVolume.VolumeName, rc.nodeName)
} else {
// Only detach if kubelet detach is enabled
glog.V(12).Infof("Attempting to start DetachVolume for volume %q (spec.Name: %q)",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name())
err := rc.operationExecutor.DetachVolume(
attachedVolume.AttachedVolume, false /* verifySafeToDetach */, rc.actualStateOfWorld)
if err != nil &&
!nestedpendingoperations.IsAlreadyExists(err) &&
!exponentialbackoff.IsExponentialBackoff(err) {
// Ignore nestedpendingoperations.IsAlreadyExists && exponentialbackoff.IsExponentialBackoff errors, they are expected.
// Log all other errors.
glog.Errorf(
"operationExecutor.DetachVolume failed for volume %q (spec.Name: %q) controllerAttachDetachEnabled: %v with err: %v",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name(),
rc.controllerAttachDetachEnabled,
err)
}
if err == nil {
glog.Infof("DetachVolume operation started for volume %q (spec.Name: %q)",
attachedVolume.VolumeName,
attachedVolume.VolumeSpec.Name())
}
}
}
}
}
}