nagios_plugins

Nagios plugin (in fact only one) for alerting on prometheus query results.

You need to add the following commands to your Nagios configuration to use it:

define command {
    command_name check_prometheus
    command_line $USER1$/check_prometheus_metric.sh -H '$ARG1$' -q '$ARG2$' -w '$ARG3$' -c '$ARG4$' -n '$ARG5$' -m '$ARG6$'
}

# check_prometheus, treating a NaN result as ok
define command {
    command_name check_prometheus_nan_ok
    command_line $USER1$/check_prometheus_metric.sh -H '$ARG1$' -q '$ARG2$' -w '$ARG3$' -c '$ARG4$' -n '$ARG5$' -m '$ARG6$' -O
}

The curl and the jq command must be installed for the plugin to work.

Usage

check_prometheus_metric.sh - simple prometheus metric extractor for nagios

  usage:
  check_prometheus_metric.sh -H HOST -q QUERY -w INT -c INT -n NAME [-m METHOD] [-O]

  options:
    -H HOST     URL of Prometheus host to query, in single quotes
    -q QUERY    Prometheus query, in single quotes, that returns a float or int
    -w INT      Warning level value (must be zero or positive)
    -c INT      Critical level value (must be zero or positive)
    -n NAME     A name for the metric being checked
    -m METHOD   Comparison method, one of gt, ge, lt, le, eq, ne
                (defaults to ge unless otherwise specified)
    -O          Accept NaN as an "OK" result