1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
|
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()
}
|