> ## Documentation Index
> Fetch the complete documentation index at: https://docs.siderolabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

> TimeSyncConfig is a config document to configure time synchronization (NTP).

# TimeSyncConfig

export const VersionWarningBanner = () => {
  const latestVersion = "v1.13";
  const [latestUrl, setLatestUrl] = useState(null);
  const [currentVersion, setCurrentVersion] = useState(null);
  const [isBeta, setIsBeta] = useState(false);
  const parseVersion = v => v.replace("v", "").split(".").map(Number);
  const isGreaterVersion = (a, b) => {
    const [aMajor, aMinor] = parseVersion(a);
    const [bMajor, bMinor] = parseVersion(b);
    if (aMajor > bMajor) return true;
    if (aMajor === bMajor && aMinor > bMinor) return true;
    return false;
  };
  useEffect(() => {
    if (typeof window === "undefined") return;
    const {pathname, hash, search} = window.location;
    const match = pathname.match(/\/talos\/(v\d+\.\d+)\//);
    if (!match) return;
    const detectedVersion = match[1];
    if (detectedVersion === latestVersion) return;
    setCurrentVersion(detectedVersion);
    if (isGreaterVersion(detectedVersion, latestVersion)) {
      setIsBeta(true);
    }
    const newPath = pathname.replace(`/talos/${detectedVersion}/`, `/talos/${latestVersion}/`);
    setLatestUrl(`${newPath}${search}${hash}`);
  }, []);
  if (!latestUrl || !currentVersion) return null;
  return <div className="not-prose sticky top-6 z-50 my-6">
      <div className="border border-yellow-500/30 bg-yellow-500/10 px-4 py-3 rounded-xl">
        <div className="text-sm">
          {isBeta ? <>
              ⚠️ You are viewing a <strong>beta version</strong> of Talos ({currentVersion}).
              This version may be unstable.
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View latest stable version {latestVersion} →
              </a>
            </> : <>
              ⚠️ You are viewing an older version of Talos ({currentVersion}).
              <a href={latestUrl} className="ml-2 underline text-yellow-400 hover:text-yellow-300 font-medium">
                View the latest version {latestVersion} →
              </a>
            </>}
        </div>
      </div>
    </div>;
};

<VersionWarningBanner />

```yaml theme={null}
apiVersion: v1alpha1
kind: TimeSyncConfig
# Specifies NTP configuration to sync the time over network.
ntp:
    # Specifies time (NTP) servers to use for setting the system time.
    servers:
        - pool.ntp.org
```

```yaml theme={null}
apiVersion: v1alpha1
kind: TimeSyncConfig
# Specific PTP (Precision Time Protocol) configuration to sync the time over PTP devices.
ptp:
    # description: |
    devices:
        - /dev/ptp0
```

<table>
  <thead>
    <tr>
      <th>Field</th>
      <th>Type</th>
      <th>Description</th>
      <th>Value(s)</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>`enabled`</td>
      <td>bool</td>
      <td>Indicates if the time synchronization is enabled for the machine.<br />Defaults to `true`.</td>

      <td />
    </tr>

    <tr>
      <td>`bootTimeout`</td>
      <td>Duration</td>
      <td>Specifies the timeout when the node time is considered to be in sync unlocking the boot sequence.<br />NTP sync will be still running in the background.<br />Defaults to "infinity" (waiting forever for time sync)</td>

      <td />
    </tr>

    <tr>
      <td>`ntp`</td>
      <td><a href="#ntp">NTPConfig</a></td>
      <td>Specifies NTP configuration to sync the time over network.<br />Mutually exclusive with PTP configuration.</td>

      <td />
    </tr>

    <tr>
      <td>`ptp`</td>
      <td><a href="#ptp">PTPConfig</a></td>
      <td>Specific PTP (Precision Time Protocol) configuration to sync the time over PTP devices.<br />Mutually exclusive with NTP configuration.</td>

      <td />
    </tr>
  </tbody>
</table>

## ntp

NTPConfig represents a NTP server configuration.

<table>
  <thead>
    <tr>
      <th>Field</th>
      <th>Type</th>
      <th>Description</th>
      <th>Value(s)</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>`servers`</td>
      <td>\[]string</td>
      <td>Specifies time (NTP) servers to use for setting the system time.<br />Defaults to `time.cloudflare.com`.</td>

      <td />
    </tr>
  </tbody>
</table>

## ptp

PTPConfig represents a PTP (Precision Time Protocol) configuration.

<table>
  <thead>
    <tr>
      <th>Field</th>
      <th>Type</th>
      <th>Description</th>
      <th>Value(s)</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>`devices`</td>
      <td>\[]string</td>
      <td>description:</td>
      <td><br /> A list of PTP devices to sync with (e.g. provided by the hypervisor).<br /><br /> A PTP device is typically represented as a character device file in the /dev directory,<br /> such as /dev/ptp0 or /dev/ptp\_kvm. These devices are used to synchronize the system time<br /> with an external time source that supports the Precision Time Protocol.<br /></td>

      <td />
    </tr>
  </tbody>
</table>