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package machine
import (
"context"
"errors"
"sync"
"time"
"github.com/crc-org/crc/v2/pkg/crc/logging"
"github.com/crc-org/crc/v2/pkg/crc/machine/state"
"github.com/crc-org/crc/v2/pkg/crc/machine/types"
crcPreset "github.com/crc-org/crc/v2/pkg/crc/preset"
)
const startCancelTimeout = 15 * time.Second
type State string
const (
Idle State = "Idle"
Deleting State = "Deleting"
Stopping State = "Stopping"
Starting State = "Starting"
)
type Synchronized struct {
underlying Client
stateLock sync.Mutex
currentState State
startCancel context.CancelFunc
syncOperationDone chan State
}
func NewSynchronizedMachine(machine Client) *Synchronized {
return &Synchronized{
underlying: machine,
currentState: Idle,
syncOperationDone: make(chan State, 1),
}
}
func (s *Synchronized) CurrentState() State {
s.stateLock.Lock()
defer s.stateLock.Unlock()
return s.currentStateUnlocked()
}
func (s *Synchronized) currentStateUnlocked() State {
select {
case st := <-s.syncOperationDone:
if s.currentState == st {
s.currentState = Idle
}
if st == Starting {
s.startCancel = nil
}
default:
}
return s.currentState
}
func (s *Synchronized) Delete() error {
if err := s.prepareStopDelete(Deleting); err != nil {
return err
}
err := s.underlying.Delete()
s.syncOperationDone <- Deleting
return err
}
func (s *Synchronized) prepareStart(startCancel context.CancelFunc) error {
s.stateLock.Lock()
defer s.stateLock.Unlock()
if s.currentStateUnlocked() != Idle {
return errors.New("cluster is busy")
}
s.startCancel = startCancel
s.currentState = Starting
return nil
}
func (s *Synchronized) Start(ctx context.Context, startConfig types.StartConfig) (*types.StartResult, error) {
ctx, startCancel := context.WithCancel(ctx)
if err := s.prepareStart(startCancel); err != nil {
return nil, err
}
startResult, err := s.underlying.Start(ctx, startConfig)
s.syncOperationDone <- Starting
return startResult, err
}
/* cancel ongoing start, and wait until the start is fully cancelled. Time out if cancellation takes more than 'timeout'
* s.stateLock must be locked before calling this function
*/
func (s *Synchronized) cancelUnlocked(timeout time.Duration) error {
if s.startCancel != nil {
logging.Infof("Cancelling virtual machine start...")
s.startCancel()
}
select {
case <-s.syncOperationDone:
return nil
case <-time.After(timeout):
return errors.New("cannot abort startup sequence quickly enough")
}
}
func (s *Synchronized) prepareStopDelete(state State) error {
s.stateLock.Lock()
defer s.stateLock.Unlock()
switch s.currentStateUnlocked() {
case Starting:
if err := s.cancelUnlocked(startCancelTimeout); err != nil {
return err
}
case Idle:
break
case Deleting, Stopping:
return errors.New("cluster is stopping or deleting")
default:
return errors.New("invalid condition")
}
s.currentState = state
return nil
}
func (s *Synchronized) Stop() (state.State, error) {
if err := s.prepareStopDelete(Stopping); err != nil {
return state.Error, err
}
st, err := s.underlying.Stop()
s.syncOperationDone <- Stopping
return st, err
}
func (s *Synchronized) GetName() string {
return s.underlying.GetName()
}
func (s *Synchronized) Exists() (bool, error) {
return s.underlying.Exists()
}
func (s *Synchronized) GetConsoleURL() (*types.ConsoleResult, error) {
return s.underlying.GetConsoleURL()
}
func (s *Synchronized) ConnectionDetails() (*types.ConnectionDetails, error) {
return s.underlying.ConnectionDetails()
}
func (s *Synchronized) PowerOff() error {
return s.underlying.PowerOff()
}
func (s *Synchronized) Status() (*types.ClusterStatusResult, error) {
switch s.CurrentState() {
case Starting:
return &types.ClusterStatusResult{
CrcStatus: state.Starting,
OpenshiftStatus: types.OpenshiftStarting,
Preset: s.underlying.GetPreset(),
}, nil
case Stopping, Deleting:
return &types.ClusterStatusResult{
CrcStatus: state.Stopping,
OpenshiftStatus: types.OpenshiftStopping,
Preset: s.underlying.GetPreset(),
}, nil
default:
return s.underlying.Status()
}
}
func (s *Synchronized) GetClusterLoad() (*types.ClusterLoadResult, error) {
return s.underlying.GetClusterLoad()
}
func (s *Synchronized) IsRunning() (bool, error) {
return s.underlying.IsRunning()
}
func (s *Synchronized) GenerateBundle(forceStop bool) error {
return s.underlying.GenerateBundle(forceStop)
}
func (s *Synchronized) GetPreset() crcPreset.Preset {
return s.underlying.GetPreset()
}
|
