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# Chrony


<img src="https://netdata.cloud/img/chrony.jpg" width="150"/>


Plugin: go.d.plugin
Module: chrony

<img src="https://img.shields.io/badge/maintained%20by-Netdata-%2300ab44" />

## Overview

This collector monitors the system's clock performance and peers activity status

It collects metrics by sending UDP packets to chronyd using the Chrony communication protocol v6.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.


### Default Behavior

#### Auto-Detection

This collector discovers Chrony instance running on the local host and listening on port 323.
On startup, it tries to collect metrics from:

- 127.0.0.1:323


#### Limits

The default configuration for this integration does not impose any limits on data collection.

#### Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.


## Metrics

Metrics grouped by *scope*.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.



### Per Chrony instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

| Metric | Dimensions | Unit |
|:------|:----------|:----|
| chrony.stratum | stratum | level |
| chrony.current_correction | current_correction | seconds |
| chrony.root_delay | root_delay | seconds |
| chrony.root_dispersion | root_delay | seconds |
| chrony.last_offset | offset | seconds |
| chrony.rms_offset | offset | seconds |
| chrony.frequency | frequency | ppm |
| chrony.residual_frequency | residual_frequency | ppm |
| chrony.skew | skew | ppm |
| chrony.update_interval | update_interval | seconds |
| chrony.ref_measurement_time | ref_measurement_time | seconds |
| chrony.leap_status | normal, insert_second, delete_second, unsynchronised | status |
| chrony.activity | online, offline, burst_online, burst_offline, unresolved | sources |



## Alerts

There are no alerts configured by default for this integration.


## Setup

### Prerequisites

No action required.

### Configuration

#### File

The configuration file name for this integration is `go.d/chrony.conf`.


You can edit the configuration file using the `edit-config` script from the
Netdata [config directory](/docs/netdata-agent/configuration/README.md#the-netdata-config-directory).

```bash
cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/chrony.conf
```
#### Options

The following options can be defined globally: update_every, autodetection_retry.


<details open><summary>Config options</summary>

| Name | Description | Default | Required |
|:----|:-----------|:-------|:--------:|
| update_every | Data collection frequency. | 5 | no |
| autodetection_retry | Recheck interval in seconds. Zero means no recheck will be scheduled. | 0 | no |
| address | Server address. The format is IP:PORT. | 127.0.0.1:323 | yes |
| timeout | Connection timeout. Zero means no timeout. | 1 | no |

</details>

#### Examples

##### Basic

A basic example configuration.

```yaml
jobs:
  - name: local
    address: 127.0.0.1:323

```
##### Multi-instance

> **Note**: When you define multiple jobs, their names must be unique.

Collecting metrics from local and remote instances.


<details open><summary>Config</summary>

```yaml
jobs:
  - name: local
    address: 127.0.0.1:323

  - name: remote
    address: 192.0.2.1:323

```
</details>



## Troubleshooting

### Debug Mode

To troubleshoot issues with the `chrony` collector, run the `go.d.plugin` with the debug option enabled. The output
should give you clues as to why the collector isn't working.

- Navigate to the `plugins.d` directory, usually at `/usr/libexec/netdata/plugins.d/`. If that's not the case on
  your system, open `netdata.conf` and look for the `plugins` setting under `[directories]`.

  ```bash
  cd /usr/libexec/netdata/plugins.d/
  ```

- Switch to the `netdata` user.

  ```bash
  sudo -u netdata -s
  ```

- Run the `go.d.plugin` to debug the collector:

  ```bash
  ./go.d.plugin -d -m chrony
  ```


