forked from GoogleCloudPlatform/compute-image-windows
/
clock.go
57 lines (48 loc) · 1.69 KB
/
clock.go
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// Copyright 2019 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"os/exec"
"runtime"
"github.com/GoogleCloudPlatform/guest-logging-go/logger"
)
type clockskewMgr struct{}
func (a *clockskewMgr) diff() bool {
return oldMetadata.Instance.VirtualClock.DriftToken != newMetadata.Instance.VirtualClock.DriftToken
}
func (a *clockskewMgr) timeout() bool {
return false
}
func (a *clockskewMgr) disabled(os string) (disabled bool) {
enabled := config.Section("Daemons").Key("clock_skew_daemon").MustBool(true)
return os == "windows" || !enabled
}
func (a *clockskewMgr) set() error {
if runtime.GOOS == "freebsd" {
err := runCmd(exec.Command("service", "ntpd", "status"))
if err == nil {
if err := runCmd(exec.Command("service", "ntpd", "stop")); err != nil {
return err
}
defer func() {
if err := runCmd(exec.Command("service", "ntpd", "start")); err != nil {
logger.Warningf("Error starting 'ntpd' after clock sync: %v.", err)
}
}()
}
// TODO get server
return runCmd(exec.Command("ntpdate", "metadata.google.internal"))
}
return runCmd(exec.Command("/sbin/hwclock", "--hctosys", "-u", "--noadjtime"))
}