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snapshot.go
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snapshot.go
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package snapshot
import (
"fmt"
"sync"
"github.com/kubernetes-incubator/external-storage/snapshot/pkg/client"
snapshotvolume "github.com/kubernetes-incubator/external-storage/snapshot/pkg/volume"
"github.com/libopenstorage/stork/drivers/volume"
"github.com/libopenstorage/stork/pkg/snapshot/controllers"
"github.com/portworx/sched-ops/k8s/errors"
log "github.com/sirupsen/logrus"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/record"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/sig-storage-lib-external-provisioner/controller"
)
const (
snapshotProvisionerName = "stork-snapshot"
snapshotProvisionerID = "stork"
)
// Snapshot snapshot
type Snapshot struct {
lock sync.Mutex
stopChannel chan struct{}
started bool
snapshotController *controllers.Snapshotter
snapshotScheduleController *controllers.SnapshotScheduleController
snapshotRestoreController *controllers.SnapshotRestoreController
provisioner *controller.ProvisionController
Driver volume.Driver
Recorder record.EventRecorder
}
// GetProvisionerName Gets the name of the provisioner
func GetProvisionerName() string {
return snapshotProvisionerName
}
// Start initialize the snapshot components
func (s *Snapshot) Start(mgr manager.Manager) error {
s.lock.Lock()
defer s.lock.Unlock()
if s.started {
return fmt.Errorf("Snapshot controllers have already been started")
}
s.stopChannel = make(chan struct{})
// Start the snapshot controller first so that the CRD gets registered
s.snapshotController = &controllers.Snapshotter{
Driver: s.Driver,
}
err := s.snapshotController.Start(s.stopChannel)
if err != nil {
return fmt.Errorf("error starting snapshot controller: %v", err)
}
if err := performRuleRecovery(); err != nil {
log.Errorf("Failed to perform recovery for snapshot rules due to: %v", err)
return err
}
config, err := rest.InClusterConfig()
if err != nil {
return err
}
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
return err
}
if clientset == nil {
return errors.ErrK8SApiAccountNotSet
}
// Start the provisioner controller
serverVersion, err := clientset.Discovery().ServerVersion()
if err != nil {
return fmt.Errorf("error getting server version: %v", err)
}
snapshotClient, _, err := client.NewClient(config)
if err != nil {
return err
}
plugins := make(map[string]snapshotvolume.Plugin)
plugins[s.Driver.String()] = s.Driver.GetSnapshotPlugin()
snapProvisioner := controllers.NewSnapshotProvisioner(clientset, snapshotClient, plugins, snapshotProvisionerID)
s.provisioner = controller.NewProvisionController(
clientset,
snapshotProvisionerName,
snapProvisioner,
serverVersion.GitVersion,
)
// stork already does leader elction, don't need it for each controller
if err := controller.LeaderElection(false)(s.provisioner); err != nil {
log.Errorf("failed to disable leader election for snapshot controller: %v", err)
return err
}
go s.provisioner.Run(s.stopChannel)
// Start the snapshot schedule controller
s.snapshotScheduleController = controllers.NewSnapshotScheduleController(mgr, s.Recorder)
err = s.snapshotScheduleController.Init(mgr)
if err != nil {
return fmt.Errorf("error initializing snapshot schedule controller: %v", err)
}
s.snapshotRestoreController = controllers.NewSnapshotRestoreController(mgr, s.Driver, s.Recorder)
err = s.snapshotRestoreController.Init(mgr)
if err != nil {
return fmt.Errorf("error initializing snapshot restore controller: %v", err)
}
s.started = true
return nil
}
// Stop Stops the snapshotter controllers
func (s *Snapshot) Stop() error {
s.lock.Lock()
defer s.lock.Unlock()
if !s.started {
return fmt.Errorf("Snapshot controllers have not been started")
}
close(s.stopChannel)
s.started = false
return nil
}