func (*scheduleSuite) TestRemove(c *gc.C) {
clock := coretesting.NewClock(time.Time{})
now := clock.Now()
s := schedule.NewSchedule(clock)
s.Add("k0", "v0", now.Add(3*time.Second))
s.Add("k1", "v1", now.Add(2*time.Second))
s.Remove("k0")
assertReady(c, s, clock /* nothing */)
clock.Advance(3 * time.Second)
assertReady(c, s, clock, "v1")
}
func (*scheduleSuite) TestAdd(c *gc.C) {
clock := coretesting.NewClock(time.Time{})
now := clock.Now()
s := schedule.NewSchedule(clock)
s.Add("k0", "v0", now.Add(3*time.Second))
s.Add("k1", "v1", now.Add(1500*time.Millisecond))
s.Add("k2", "v2", now.Add(2*time.Second))
clock.Advance(time.Second) // T+1
assertReady(c, s, clock /* nothing */)
clock.Advance(time.Second) // T+2
assertReady(c, s, clock, "v1", "v2")
assertReady(c, s, clock /* nothing */)
clock.Advance(500 * time.Millisecond) // T+2.5
assertReady(c, s, clock /* nothing */)
clock.Advance(time.Second) // T+3.5
assertReady(c, s, clock, "v0")
}
func (*scheduleSuite) TestNext(c *gc.C) {
clock := coretesting.NewClock(time.Time{})
now := clock.Now()
s := schedule.NewSchedule(clock)
s.Add("k0", "v0", now.Add(3*time.Second))
s.Add("k1", "v1", now.Add(1500*time.Millisecond))
s.Add("k2", "v2", now.Add(2*time.Second))
s.Add("k3", "v3", now.Add(2500*time.Millisecond))
assertNextOp(c, s, clock, 1500*time.Millisecond)
clock.Advance(1500 * time.Millisecond)
assertReady(c, s, clock, "v1")
clock.Advance(500 * time.Millisecond)
assertNextOp(c, s, clock, 0)
assertReady(c, s, clock, "v2")
s.Remove("k3")
clock.Advance(2 * time.Second) // T+4
assertNextOp(c, s, clock, 0)
assertReady(c, s, clock, "v0")
}
func (*scheduleSuite) TestRemoveKeyNotFound(c *gc.C) {
s := schedule.NewSchedule(coretesting.NewClock(time.Time{}))
s.Remove("0") // does not explode
}
func (*scheduleSuite) TestReadyNoEvents(c *gc.C) {
s := schedule.NewSchedule(coretesting.NewClock(time.Time{}))
ready := s.Ready(time.Now())
c.Assert(ready, gc.HasLen, 0)
}
func (*scheduleSuite) TestNextNoEvents(c *gc.C) {
s := schedule.NewSchedule(coretesting.NewClock(time.Time{}))
next := s.Next()
c.Assert(next, gc.IsNil)
}
func (w *storageProvisioner) loop() error {
var (
volumesChanges watcher.StringsChannel
filesystemsChanges watcher.StringsChannel
volumeAttachmentsChanges watcher.MachineStorageIdsChannel
filesystemAttachmentsChanges watcher.MachineStorageIdsChannel
machineBlockDevicesChanges <-chan struct{}
)
machineChanges := make(chan names.MachineTag)
modelConfigWatcher, err := w.config.Environ.WatchForModelConfigChanges()
if err != nil {
return errors.Annotate(err, "watching model config")
}
if err := w.catacomb.Add(modelConfigWatcher); err != nil {
return errors.Trace(err)
}
// Machine-scoped provisioners need to watch block devices, to create
// volume-backed filesystems.
if machineTag, ok := w.config.Scope.(names.MachineTag); ok {
machineBlockDevicesWatcher, err := w.config.Volumes.WatchBlockDevices(machineTag)
if err != nil {
return errors.Annotate(err, "watching block devices")
}
if err := w.catacomb.Add(machineBlockDevicesWatcher); err != nil {
return errors.Trace(err)
}
machineBlockDevicesChanges = machineBlockDevicesWatcher.Changes()
}
startWatchers := func() error {
volumesWatcher, err := w.config.Volumes.WatchVolumes()
if err != nil {
return errors.Annotate(err, "watching volumes")
}
if err := w.catacomb.Add(volumesWatcher); err != nil {
return errors.Trace(err)
}
volumesChanges = volumesWatcher.Changes()
filesystemsWatcher, err := w.config.Filesystems.WatchFilesystems()
if err != nil {
return errors.Annotate(err, "watching filesystems")
}
if err := w.catacomb.Add(filesystemsWatcher); err != nil {
return errors.Trace(err)
}
filesystemsChanges = filesystemsWatcher.Changes()
volumeAttachmentsWatcher, err := w.config.Volumes.WatchVolumeAttachments()
if err != nil {
return errors.Annotate(err, "watching volume attachments")
}
if err := w.catacomb.Add(volumeAttachmentsWatcher); err != nil {
return errors.Trace(err)
}
volumeAttachmentsChanges = volumeAttachmentsWatcher.Changes()
filesystemAttachmentsWatcher, err := w.config.Filesystems.WatchFilesystemAttachments()
if err != nil {
return errors.Annotate(err, "watching filesystem attachments")
}
if err := w.catacomb.Add(filesystemAttachmentsWatcher); err != nil {
return errors.Trace(err)
}
filesystemAttachmentsChanges = filesystemAttachmentsWatcher.Changes()
return nil
}
ctx := context{
kill: w.catacomb.Kill,
addWorker: w.catacomb.Add,
config: w.config,
volumes: make(map[names.VolumeTag]storage.Volume),
volumeAttachments: make(map[params.MachineStorageId]storage.VolumeAttachment),
volumeBlockDevices: make(map[names.VolumeTag]storage.BlockDevice),
filesystems: make(map[names.FilesystemTag]storage.Filesystem),
filesystemAttachments: make(map[params.MachineStorageId]storage.FilesystemAttachment),
machines: make(map[names.MachineTag]*machineWatcher),
machineChanges: machineChanges,
schedule: schedule.NewSchedule(w.config.Clock),
incompleteVolumeParams: make(map[names.VolumeTag]storage.VolumeParams),
incompleteVolumeAttachmentParams: make(map[params.MachineStorageId]storage.VolumeAttachmentParams),
incompleteFilesystemParams: make(map[names.FilesystemTag]storage.FilesystemParams),
incompleteFilesystemAttachmentParams: make(map[params.MachineStorageId]storage.FilesystemAttachmentParams),
pendingVolumeBlockDevices: make(set.Tags),
}
ctx.managedFilesystemSource = newManagedFilesystemSource(
ctx.volumeBlockDevices, ctx.filesystems,
)
for {
// Check if block devices need to be refreshed.
if err := processPendingVolumeBlockDevices(&ctx); err != nil {
return errors.Annotate(err, "processing pending block devices")
}
select {
case <-w.catacomb.Dying():
return w.catacomb.ErrDying()
case _, ok := <-modelConfigWatcher.Changes():
if !ok {
return errors.New("environ config watcher closed")
}
modelConfig, err := w.config.Environ.ModelConfig()
if err != nil {
return errors.Annotate(err, "getting model config")
}
if ctx.modelConfig == nil {
// We've received the initial model config,
// so we can begin provisioning storage.
if err := startWatchers(); err != nil {
return err
}
}
ctx.modelConfig = modelConfig
case changes, ok := <-volumesChanges:
if !ok {
return errors.New("volumes watcher closed")
}
if err := volumesChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-volumeAttachmentsChanges:
if !ok {
return errors.New("volume attachments watcher closed")
}
if err := volumeAttachmentsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-filesystemsChanges:
if !ok {
return errors.New("filesystems watcher closed")
}
if err := filesystemsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-filesystemAttachmentsChanges:
if !ok {
return errors.New("filesystem attachments watcher closed")
}
if err := filesystemAttachmentsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case _, ok := <-machineBlockDevicesChanges:
if !ok {
return errors.New("machine block devices watcher closed")
}
if err := machineBlockDevicesChanged(&ctx); err != nil {
return errors.Trace(err)
}
case machineTag := <-machineChanges:
if err := refreshMachine(&ctx, machineTag); err != nil {
return errors.Trace(err)
}
case <-ctx.schedule.Next():
// Ready to pick something(s) off the pending queue.
if err := processSchedule(&ctx); err != nil {
return errors.Trace(err)
}
}
}
}
func (w *storageprovisioner) loop() error {
var environConfigChanges <-chan struct{}
var volumesWatcher apiwatcher.StringsWatcher
var filesystemsWatcher apiwatcher.StringsWatcher
var volumesChanges <-chan []string
var filesystemsChanges <-chan []string
var volumeAttachmentsWatcher apiwatcher.MachineStorageIdsWatcher
var filesystemAttachmentsWatcher apiwatcher.MachineStorageIdsWatcher
var volumeAttachmentsChanges <-chan []params.MachineStorageId
var filesystemAttachmentsChanges <-chan []params.MachineStorageId
var machineBlockDevicesWatcher apiwatcher.NotifyWatcher
var machineBlockDevicesChanges <-chan struct{}
machineChanges := make(chan names.MachineTag)
environConfigWatcher, err := w.environ.WatchForEnvironConfigChanges()
if err != nil {
return errors.Annotate(err, "watching environ config")
}
defer watcher.Stop(environConfigWatcher, &w.tomb)
environConfigChanges = environConfigWatcher.Changes()
// Machine-scoped provisioners need to watch block devices, to create
// volume-backed filesystems.
if machineTag, ok := w.scope.(names.MachineTag); ok {
machineBlockDevicesWatcher, err = w.volumes.WatchBlockDevices(machineTag)
if err != nil {
return errors.Annotate(err, "watching block devices")
}
defer watcher.Stop(machineBlockDevicesWatcher, &w.tomb)
machineBlockDevicesChanges = machineBlockDevicesWatcher.Changes()
}
// The other watchers are started dynamically; stop only if started.
defer w.maybeStopWatcher(volumesWatcher)
defer w.maybeStopWatcher(volumeAttachmentsWatcher)
defer w.maybeStopWatcher(filesystemsWatcher)
defer w.maybeStopWatcher(filesystemAttachmentsWatcher)
startWatchers := func() error {
var err error
volumesWatcher, err = w.volumes.WatchVolumes()
if err != nil {
return errors.Annotate(err, "watching volumes")
}
filesystemsWatcher, err = w.filesystems.WatchFilesystems()
if err != nil {
return errors.Annotate(err, "watching filesystems")
}
volumeAttachmentsWatcher, err = w.volumes.WatchVolumeAttachments()
if err != nil {
return errors.Annotate(err, "watching volume attachments")
}
filesystemAttachmentsWatcher, err = w.filesystems.WatchFilesystemAttachments()
if err != nil {
return errors.Annotate(err, "watching filesystem attachments")
}
volumesChanges = volumesWatcher.Changes()
filesystemsChanges = filesystemsWatcher.Changes()
volumeAttachmentsChanges = volumeAttachmentsWatcher.Changes()
filesystemAttachmentsChanges = filesystemAttachmentsWatcher.Changes()
return nil
}
ctx := context{
scope: w.scope,
storageDir: w.storageDir,
volumeAccessor: w.volumes,
filesystemAccessor: w.filesystems,
life: w.life,
machineAccessor: w.machines,
statusSetter: w.status,
time: w.clock,
volumes: make(map[names.VolumeTag]storage.Volume),
volumeAttachments: make(map[params.MachineStorageId]storage.VolumeAttachment),
volumeBlockDevices: make(map[names.VolumeTag]storage.BlockDevice),
filesystems: make(map[names.FilesystemTag]storage.Filesystem),
filesystemAttachments: make(map[params.MachineStorageId]storage.FilesystemAttachment),
machines: make(map[names.MachineTag]*machineWatcher),
machineChanges: machineChanges,
schedule: schedule.NewSchedule(w.clock),
pendingVolumeBlockDevices: make(set.Tags),
incompleteVolumeParams: make(map[names.VolumeTag]storage.VolumeParams),
incompleteVolumeAttachmentParams: make(map[params.MachineStorageId]storage.VolumeAttachmentParams),
pendingFilesystems: make(map[names.FilesystemTag]storage.FilesystemParams),
pendingFilesystemAttachments: make(map[params.MachineStorageId]storage.FilesystemAttachmentParams),
pendingDyingFilesystemAttachments: make(map[params.MachineStorageId]storage.FilesystemAttachmentParams),
}
ctx.managedFilesystemSource = newManagedFilesystemSource(
ctx.volumeBlockDevices, ctx.filesystems,
)
defer func() {
for _, w := range ctx.machines {
w.stop()
}
}()
for {
// Check if any pending operations can be fulfilled.
if err := processPending(&ctx); err != nil {
return errors.Trace(err)
}
select {
case <-w.tomb.Dying():
return tomb.ErrDying
case _, ok := <-environConfigChanges:
if !ok {
return watcher.EnsureErr(environConfigWatcher)
}
environConfig, err := w.environ.EnvironConfig()
if err != nil {
return errors.Annotate(err, "getting environ config")
}
if ctx.environConfig == nil {
// We've received the initial environ config,
// so we can begin provisioning storage.
if err := startWatchers(); err != nil {
return err
}
}
ctx.environConfig = environConfig
case changes, ok := <-volumesChanges:
if !ok {
return watcher.EnsureErr(volumesWatcher)
}
if err := volumesChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-volumeAttachmentsChanges:
if !ok {
return watcher.EnsureErr(volumeAttachmentsWatcher)
}
if err := volumeAttachmentsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-filesystemsChanges:
if !ok {
return watcher.EnsureErr(filesystemsWatcher)
}
if err := filesystemsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case changes, ok := <-filesystemAttachmentsChanges:
if !ok {
return watcher.EnsureErr(filesystemAttachmentsWatcher)
}
if err := filesystemAttachmentsChanged(&ctx, changes); err != nil {
return errors.Trace(err)
}
case _, ok := <-machineBlockDevicesChanges:
if !ok {
return watcher.EnsureErr(machineBlockDevicesWatcher)
}
if err := machineBlockDevicesChanged(&ctx); err != nil {
return errors.Trace(err)
}
case machineTag := <-machineChanges:
if err := refreshMachine(&ctx, machineTag); err != nil {
return errors.Trace(err)
}
case <-ctx.schedule.Next():
// Ready to pick something(s) off the pending queue.
if err := processSchedule(&ctx); err != nil {
return errors.Trace(err)
}
}
}
}
