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[ws-manager] Add event to workspace Pod when the PVC restored from the VolumeSnapshot #11367

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Jul 18, 2022
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71 changes: 49 additions & 22 deletions components/ws-manager/pkg/manager/manager.go
Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,12 @@ import (
k8serr "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
covev1client "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/retry"
"sigs.k8s.io/controller-runtime/pkg/client"

Expand Down Expand Up @@ -69,6 +72,8 @@ type Manager struct {

metrics *metrics

eventRecorder record.EventRecorder

api.UnimplementedWorkspaceManagerServer
regapi.UnimplementedSpecProviderServer
}
Expand Down Expand Up @@ -127,14 +132,19 @@ func New(config config.Configuration, client client.Client, rawClient kubernetes
return nil, err
}

broadcaster := record.NewBroadcaster()
broadcaster.StartRecordingToSink(&covev1client.EventSinkImpl{Interface: rawClient.CoreV1().Events("")})
eventRecorder := broadcaster.NewRecorder(runtime.NewScheme(), corev1.EventSource{Component: "ws-manager"})

m := &Manager{
Config: config,
Clientset: client,
RawClient: rawClient,
Content: cp,
clock: clock.System(),
subscribers: make(map[string]chan *api.SubscribeResponse),
wsdaemonPool: grpcpool.New(wsdaemonConnfactory, checkWSDaemonEndpoint(config.Namespace, client)),
Config: config,
Clientset: client,
RawClient: rawClient,
Content: cp,
clock: clock.System(),
subscribers: make(map[string]chan *api.SubscribeResponse),
wsdaemonPool: grpcpool.New(wsdaemonConnfactory, checkWSDaemonEndpoint(config.Namespace, client)),
eventRecorder: eventRecorder,
}
m.metrics = newMetrics(m)
m.OnChange = m.onChange
Expand Down Expand Up @@ -165,7 +175,7 @@ func (m *Manager) StartWorkspace(ctx context.Context, req *api.StartWorkspaceReq
clog.Info("StartWorkspace")
reqs, _ := protojson.Marshal(req)
safeReqs, _ := log.RedactJSON(reqs)
log.WithField("req", string(safeReqs)).Debug("StartWorkspace request received")
clog.WithField("req", string(safeReqs)).Debug("StartWorkspace request received")

// Make sure the objects we're about to create do not exist already
switch req.Type {
Expand Down Expand Up @@ -238,11 +248,11 @@ func (m *Manager) StartWorkspace(ctx context.Context, req *api.StartWorkspaceReq
// restore volume snapshot from handle
err = m.restoreVolumeSnapshotFromHandle(ctx, startContext.VolumeSnapshot.VolumeSnapshotName, startContext.VolumeSnapshot.VolumeSnapshotHandle)
if err != nil {
log.WithError(err).Error("was unable to restore volume snapshot")
clog.WithError(err).Error("was unable to restore volume snapshot")
return nil, err
}
} else if err != nil {
log.WithError(err).Error("was unable to get volume snapshot")
clog.WithError(err).Error("was unable to get volume snapshot")
return nil, err
}
}
Expand Down Expand Up @@ -310,20 +320,37 @@ func (m *Manager) StartWorkspace(ctx context.Context, req *api.StartWorkspaceReq
}

// we only calculate the time that PVC restoring from VolumeSnapshot
if createPVC && startContext.VolumeSnapshot != nil && startContext.VolumeSnapshot.VolumeSnapshotName != "" {
err := wait.PollWithContext(ctx, 100*time.Millisecond, 5*time.Minute, pvcRunning(m.Clientset, pvc.Name, pvc.Namespace))
if err == nil {
wsType := api.WorkspaceType_name[int32(req.Type)]
hist, err := m.metrics.volumeRestoreTimeHistVec.GetMetricWithLabelValues(wsType, req.Spec.Class)
if err != nil {
log.WithError(err).WithField("type", wsType).Warn("cannot get volume restore time histogram metric")
} else if endTime.IsZero() {
endTime = time.Now()
hist.Observe(endTime.Sub(startTime).Seconds())
}
if createPVC {
err = m.Clientset.Get(ctx, types.NamespacedName{Namespace: pod.Namespace, Name: pod.Name}, pod)
if err != nil {
return nil, xerrors.Errorf("unable to get workspace pod %s: %w", pod.Name, err)
}

log.WithError(err).Warn("unexpected error waiting for PVC")
err = wait.PollWithContext(ctx, 100*time.Millisecond, 5*time.Minute, pvcRunning(m.Clientset, pvc.Name, pvc.Namespace))
if err != nil {
if startContext.VolumeSnapshot != nil && startContext.VolumeSnapshot.VolumeSnapshotName != "" {
m.eventRecorder.Eventf(pod, corev1.EventTypeWarning, "PersistentVolumeClaim", "PVC %q restore from volume snapshot %q failed %v", pvc.Name, startContext.VolumeSnapshot.VolumeSnapshotName, err)
clog.WithError(err).Warnf("unexpected error waiting for PVC %s volume snapshot %s", pvc.Name, startContext.VolumeSnapshot.VolumeSnapshotName)
} else {
m.eventRecorder.Eventf(pod, corev1.EventTypeWarning, "PersistentVolumeClaim", "PVC %q create failed %v", pvc.Name, err)
clog.WithError(err).Warnf("unexpected error waiting for PVC %s", pvc.Name)
}
} else {
if startContext.VolumeSnapshot != nil && startContext.VolumeSnapshot.VolumeSnapshotName != "" {
m.eventRecorder.Eventf(pod, corev1.EventTypeNormal, "PersistentVolumeClaim", "PVC %q restored from volume snapshot %q successfully", pvc.Name, startContext.VolumeSnapshot.VolumeSnapshotName)

wsType := api.WorkspaceType_name[int32(req.Type)]
hist, err := m.metrics.volumeRestoreTimeHistVec.GetMetricWithLabelValues(wsType, req.Spec.Class)
if err != nil {
clog.WithError(err).WithField("type", wsType).Warn("cannot get volume restore time histogram metric")
} else if endTime.IsZero() {
endTime = time.Now()
hist.Observe(endTime.Sub(startTime).Seconds())
}
} else {
m.eventRecorder.Eventf(pod, corev1.EventTypeNormal, "PersistentVolumeClaim", "PVC %q created successfully", pvc.Name)
}
}
}

// remove annotation to signal that workspace pod was indeed created and scheduled on the node
Expand Down
8 changes: 1 addition & 7 deletions components/ws-manager/pkg/manager/monitor.go
Original file line number Diff line number Diff line change
Expand Up @@ -26,10 +26,8 @@ import (
k8serr "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/watch"
covev1client "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/client"

Expand Down Expand Up @@ -94,10 +92,6 @@ type Monitor struct {

// CreateMonitor creates a new monitor
func (m *Manager) CreateMonitor() (*Monitor, error) {
broadcaster := record.NewBroadcaster()
broadcaster.StartRecordingToSink(&covev1client.EventSinkImpl{Interface: m.RawClient.CoreV1().Events("")})
eventRecorder := broadcaster.NewRecorder(runtime.NewScheme(), corev1.EventSource{Component: "ws-manager"})

monitorInterval := time.Duration(m.Config.HeartbeatInterval)
// Monitor interval is half the heartbeat interval to catch timed out workspaces in time.
// See https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem why we need this.
Expand All @@ -117,7 +111,7 @@ func (m *Manager) CreateMonitor() (*Monitor, error) {

notifyPod: make(map[string]chan string),

eventRecorder: eventRecorder,
eventRecorder: m.eventRecorder,
}
res.eventpool = workpool.NewEventWorkerPool(res.handleEvent)
res.act = struct {
Expand Down