mirror of https://github.com/jetkvm/kvm.git
66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package timesync
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import (
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"math/rand/v2"
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"time"
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"github.com/beevik/ntp"
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)
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func (t *TimeSync) queryNetworkTime() (now *time.Time) {
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chunkSize := 4
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ntpServers := t.ntpServers
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// shuffle the ntp servers to avoid always querying the same servers
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rand.Shuffle(len(ntpServers), func(i, j int) { ntpServers[i], ntpServers[j] = ntpServers[j], ntpServers[i] })
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for i := 0; i < len(ntpServers); i += chunkSize {
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chunk := ntpServers[i:min(i+chunkSize, len(ntpServers))]
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results := t.queryMultipleNTP(chunk, timeSyncTimeout)
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if results != nil {
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return results
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}
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}
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return nil
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}
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func (t *TimeSync) queryMultipleNTP(servers []string, timeout time.Duration) (now *time.Time) {
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results := make(chan *time.Time, len(servers))
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for _, server := range servers {
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go func(server string) {
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scopedLogger := t.l.With().
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Str("server", server).
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Logger()
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now, err, response := queryNtpServer(server, timeout)
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if err == nil {
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scopedLogger.Info().
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Str("time", now.Format(time.RFC3339)).
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Str("reference", response.ReferenceString()).
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Str("rtt", response.RTT.String()).
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Str("clockOffset", response.ClockOffset.String()).
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Uint8("stratum", response.Stratum).
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Msg("NTP server returned time")
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results <- now
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} else {
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scopedLogger.Warn().
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Str("error", err.Error()).
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Msg("failed to query NTP server")
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}
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}(server)
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}
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return <-results
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}
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func queryNtpServer(server string, timeout time.Duration) (now *time.Time, err error, response *ntp.Response) {
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resp, err := ntp.QueryWithOptions(server, ntp.QueryOptions{Timeout: timeout})
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if err != nil {
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return nil, err, nil
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}
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return &resp.Time, nil, resp
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}
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