mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-09-23 02:47:57 +00:00
Refactor volume attach code
This commit is contained in:
Hemant Kumar
@@ -169,7 +169,7 @@ func (rc *reconciler) reconcile() {
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// attach if kubelet is responsible for attaching volumes.
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// If underlying PVC was resized while in-use then this function also handles volume
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// resizing.
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rc.mountAttachVolumes()
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rc.mountOrAttachVolumes()
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// Ensure devices that should be detached/unmounted are detached/unmounted.
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rc.unmountDetachDevices()
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@@ -193,82 +193,94 @@ func (rc *reconciler) unmountVolumes() {
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}
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}
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func (rc *reconciler) mountAttachVolumes() {
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func (rc *reconciler) mountOrAttachVolumes() {
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// Ensure volumes that should be attached/mounted are attached/mounted.
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for _, volumeToMount := range rc.desiredStateOfWorld.GetVolumesToMount() {
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volMounted, devicePath, err := rc.actualStateOfWorld.PodExistsInVolume(volumeToMount.PodName, volumeToMount.VolumeName)
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volumeToMount.DevicePath = devicePath
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if cache.IsVolumeNotAttachedError(err) {
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if rc.controllerAttachDetachEnabled || !volumeToMount.PluginIsAttachable {
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//// lets not spin a goroutine and unnecessarily trigger exponential backoff if this happens
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if volumeToMount.PluginIsAttachable && !volumeToMount.ReportedInUse {
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.VerifyControllerAttachedVolume failed", " volume not marked in-use"), "pod", klog.KObj(volumeToMount.Pod))
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continue
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}
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// Volume is not attached (or doesn't implement attacher), kubelet attach is disabled, wait
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// for controller to finish attaching volume.
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.VerifyControllerAttachedVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.VerifyControllerAttachedVolume(
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volumeToMount.VolumeToMount,
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rc.nodeName,
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rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.VerifyControllerAttachedVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.VerifyControllerAttachedVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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} else {
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// Volume is not attached to node, kubelet attach is enabled, volume implements an attacher,
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// so attach it
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volumeToAttach := operationexecutor.VolumeToAttach{
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VolumeName: volumeToMount.VolumeName,
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VolumeSpec: volumeToMount.VolumeSpec,
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NodeName: rc.nodeName,
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}
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klog.V(5).InfoS(volumeToAttach.GenerateMsgDetailed("Starting operationExecutor.AttachVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.AttachVolume(volumeToAttach, rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.AttachVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.AttachVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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}
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rc.waitForVolumeAttach(volumeToMount)
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} else if !volMounted || cache.IsRemountRequiredError(err) {
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// Volume is not mounted, or is already mounted, but requires remounting
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remountingLogStr := ""
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isRemount := cache.IsRemountRequiredError(err)
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if isRemount {
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remountingLogStr = "Volume is already mounted to pod, but remount was requested."
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}
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.MountVolume", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.MountVolume(
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rc.waitForAttachTimeout,
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volumeToMount.VolumeToMount,
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rc.actualStateOfWorld,
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isRemount)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.MountVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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if remountingLogStr == "" {
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klog.V(1).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.MountVolume started", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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} else {
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.MountVolume started", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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}
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}
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rc.mountAttachedVolumes(volumeToMount, err)
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} else if cache.IsFSResizeRequiredError(err) {
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.ExpandInUseVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.ExpandInUseVolume(
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volumeToMount.VolumeToMount,
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rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed("operationExecutor.ExpandInUseVolume failed", err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.ExpandInUseVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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rc.expandVolume(volumeToMount)
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}
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}
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}
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func (rc *reconciler) expandVolume(volumeToMount cache.VolumeToMount) {
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.ExpandInUseVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.ExpandInUseVolume(volumeToMount.VolumeToMount, rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed("operationExecutor.ExpandInUseVolume failed", err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.ExpandInUseVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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}
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func (rc *reconciler) mountAttachedVolumes(volumeToMount cache.VolumeToMount, podExistError error) {
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// Volume is not mounted, or is already mounted, but requires remounting
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remountingLogStr := ""
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isRemount := cache.IsRemountRequiredError(podExistError)
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if isRemount {
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remountingLogStr = "Volume is already mounted to pod, but remount was requested."
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}
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klog.V(4).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.MountVolume", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.MountVolume(
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rc.waitForAttachTimeout,
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volumeToMount.VolumeToMount,
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rc.actualStateOfWorld,
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isRemount)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.MountVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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if remountingLogStr == "" {
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klog.V(1).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.MountVolume started", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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} else {
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.MountVolume started", remountingLogStr), "pod", klog.KObj(volumeToMount.Pod))
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}
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}
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}
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func (rc *reconciler) waitForVolumeAttach(volumeToMount cache.VolumeToMount) {
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if rc.controllerAttachDetachEnabled || !volumeToMount.PluginIsAttachable {
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//// lets not spin a goroutine and unnecessarily trigger exponential backoff if this happens
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if volumeToMount.PluginIsAttachable && !volumeToMount.ReportedInUse {
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.VerifyControllerAttachedVolume failed", " volume not marked in-use"), "pod", klog.KObj(volumeToMount.Pod))
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return
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}
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// Volume is not attached (or doesn't implement attacher), kubelet attach is disabled, wait
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// for controller to finish attaching volume.
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klog.V(5).InfoS(volumeToMount.GenerateMsgDetailed("Starting operationExecutor.VerifyControllerAttachedVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.VerifyControllerAttachedVolume(
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volumeToMount.VolumeToMount,
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rc.nodeName,
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rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.VerifyControllerAttachedVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.VerifyControllerAttachedVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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} else {
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// Volume is not attached to node, kubelet attach is enabled, volume implements an attacher,
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// so attach it
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volumeToAttach := operationexecutor.VolumeToAttach{
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VolumeName: volumeToMount.VolumeName,
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VolumeSpec: volumeToMount.VolumeSpec,
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NodeName: rc.nodeName,
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}
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klog.V(5).InfoS(volumeToAttach.GenerateMsgDetailed("Starting operationExecutor.AttachVolume", ""), "pod", klog.KObj(volumeToMount.Pod))
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err := rc.operationExecutor.AttachVolume(volumeToAttach, rc.actualStateOfWorld)
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if err != nil && !isExpectedError(err) {
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klog.ErrorS(err, volumeToMount.GenerateErrorDetailed(fmt.Sprintf("operationExecutor.AttachVolume failed (controllerAttachDetachEnabled %v)", rc.controllerAttachDetachEnabled), err).Error(), "pod", klog.KObj(volumeToMount.Pod))
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}
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if err == nil {
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klog.InfoS(volumeToMount.GenerateMsgDetailed("operationExecutor.AttachVolume started", ""), "pod", klog.KObj(volumeToMount.Pod))
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}
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}
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}
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