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stop.go
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stop.go
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package manager
import (
"fmt"
"os"
"os/exec"
"sync"
"time"
proto "github.com/Cloud-Foundations/Dominator/proto/hypervisor"
)
type flusher interface {
Flush() error
}
func (m *Manager) powerOff(stopVMs bool) error {
m.mutex.RLock()
defer m.mutex.RUnlock()
if stopVMs {
m.shutdownVMs()
}
for _, vm := range m.vms {
if vm.State != proto.StateStopped {
return fmt.Errorf("%s is not shut down", vm.Address.IpAddress)
}
}
cmd := exec.Command("poweroff")
if output, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf("%s: %s", err, string(output))
}
return nil
}
func (m *Manager) shutdownVMs() {
var waitGroup sync.WaitGroup
for _, vm := range m.vms {
waitGroup.Add(1)
go func(vm *vmInfoType) {
defer waitGroup.Done()
vm.shutdown()
}(vm)
}
waitGroup.Wait()
m.Logger.Println("stopping cleanly after shutting down VMs")
if flusher, ok := m.Logger.(flusher); ok {
flusher.Flush()
}
}
func (m *Manager) shutdownVMsAndExit() {
m.mutex.RLock()
defer m.mutex.RUnlock()
m.shutdownVMs()
os.Exit(0)
}
func (vm *vmInfoType) shutdown() {
vm.mutex.RLock()
switch vm.State {
case proto.StateStarting, proto.StateRunning:
stoppedNotifier := make(chan struct{}, 1)
vm.stoppedNotifier = stoppedNotifier
vm.commandChannel <- "system_powerdown"
vm.mutex.RUnlock()
timer := time.NewTimer(time.Minute)
select {
case <-stoppedNotifier:
if !timer.Stop() {
<-timer.C
}
vm.logger.Println("shut down cleanly for system shutdown")
case <-timer.C:
vm.logger.Println("shutdown timed out: killing VM")
vm.commandChannel <- "quit"
}
default:
vm.mutex.RUnlock()
}
}