OpenNTPD Input Plugin

This plugin gathers metrics from OpenNTPD using the ntpctl command.

Introduced in: Telegraf v1.12.0 Tags: server, network OS support: all

Global configuration options

In addition to the plugin-specific configuration settings, plugins support additional global and plugin configuration settings. These settings are used to modify metrics, tags, and field or create aliases and configure ordering, etc. See the CONFIGURATION.md for more details.

Configuration

# Get standard NTP query metrics from OpenNTPD.
[[inputs.openntpd]]
  ## Run ntpctl binary with sudo.
  # use_sudo = false

  ## Location of the ntpctl binary.
  # binary = "/usr/sbin/ntpctl"

  ## Maximum time the ntpctl binary is allowed to run.
  # timeout = "5s"

Permissions

It’s important to note that this plugin references ntpctl, which may require additional permissions to execute successfully. Depending on the user/group permissions of the telegraf user executing this plugin, you may need to alter the group membership, set facls, or use sudo.

Group membership (recommended)

$ groups telegraf
telegraf : telegraf

$ usermod -a -G ntpd telegraf

$ groups telegraf
telegraf : telegraf ntpd

Sudo privileges

If you use this method, you will need the following in your telegraf config:

[[inputs.openntpd]]
  use_sudo = true

You will also need to update your sudoers file:

$ visudo
# Add the following lines:
Cmnd_Alias NTPCTL = /usr/sbin/ntpctl
telegraf ALL=(ALL) NOPASSWD: NTPCTL
Defaults!NTPCTL !logfile, !syslog, !pam_session

Please use the solution you see as most appropriate.

Metrics

• ntpctl
  • tags:
    • remote (remote peer for synchorization)
    • stratum (remote peer stratum)
  • fields:
    • delay (round trip delay to the remote peer in milliseconds; float)
    • jitter (mean deviation (jitter) for remote peer; float)
    • offset (mean offset (phase) to remote peer in milliseconds; float)
    • poll (polling interval in seconds; int)
    • next (number of seconds until the next poll; int)
    • wt (peer weight; int)
    • tl (peer trust level; int)

Example Output

openntpd,remote=194.57.169.1,stratum=2,host=localhost tl=10i,poll=1007i,
offset=2.295,jitter=3.896,delay=53.766,next=266i,wt=1i 1514454299000000000