check_ntp_offset

Checks the NTP offset.

Implementation

Windows	Linux	FreeBSD	MacOSX
✅	✅	✅	✅

Argument Defaults

Argument	Default Value
filter	none
warning	offset > 50 \|\| offset < -50
critical	offset > 100 \|\| offset < -100
empty-state	3 (UNKNOWN)
empty-syntax	%(status) - could not get any ntp data
top-syntax	%(status) - %(list)
ok-syntax
detail-syntax	offset %(offset_seconds:duration) from %(server)

Check Specific Arguments

Argument	Description
server	Fetch offset from these NTP servers. First valid response is used.
source	Set source of time data instead of automatic detection. Valid values are: auto, timedatectl, ntpq, chronyc, osx, w32tm.

Attributes

Filter Keywords

these can be used in filters and thresholds (along with the default attributes):

Attribute	Description
source	source of the NTP metrics
server	NTP server name
stratum	stratum value (distance to root NTP server)
jitter	jitter of the clock in milliseconds
offset	time offset to NTP server in milliseconds. This will be added as a metric.
offset_seconds	time offset to NTP server in seconds. This will not be added as a metric. Any thresholds using ‘offset_seconds’ will be converted to ‘offset’ silently.

Examples

Default Check

check_ntp_offset
OK - offset 2.1ms from 1.2.3.4 (debian.pool.ntp.org) |...

Example using check_snclient and Naemon

Naemon Config

define command{
    command_name         check_snclient
    command_line         $USER1$/check_snclient -k -p 'your-password' -u 'https://$HOSTADDRESS$:8443' $ARG1$ $ARG2$
}

define service {
    host_name            testhost
    service_description  check_ntp_offset
    use                  generic-service
    check_command        check_snclient!check_ntp_offset!'warn=offset > 50 || offset < -50' 'crit=offset > 100 || offset < -100'
}