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Check fortios-sensor

Overview

Checks hardware sensor readings (temperature, voltage, fan speed) on FortiGate appliances running FortiOS via the REST API. Alerts when any sensor value crosses the appliance-defined thresholds (lower_non_critical, lower_critical, upper_non_critical, upper_critical). Sensors reporting a value of 0.0 are skipped automatically. Authentication uses a single API token (token-based authentication).

Important Notes:

  • FortiGate appliances running FortiOS with REST API enabled

Data Collection:

  • Queries the FortiOS REST API endpoint /api/v2/monitor/system/sensor-info/select to fetch all hardware sensor readings and their thresholds

Fact Sheet

Fact Value
Check Plugin Download https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/fortios-sensor
Nagios/Icinga Check Name check_fortios_sensor
Check Interval Recommendation Every 15 minutes
Can be called without parameters No (--hostname and --password are required)
Runs on Cross-platform
Compiled for Windows No

Help

usage: fortios-sensor [-h] [-V] [--always-ok] -H HOSTNAME [--insecure]
                      [--no-proxy] --password PASSWORD [--timeout TIMEOUT]

Checks hardware sensor readings (temperature, voltage, fan speed) on FortiGate
appliances running FortiOS via the REST API. Alerts when any sensor reports an
alarm condition.

options:
  -h, --help            show this help message and exit
  -V, --version         show program's version number and exit
  --always-ok           Always returns OK.
  -H, --hostname HOSTNAME
                        FortiOS-based appliance address, optionally including
                        port. Example: `--hostname 192.168.1.1:443`.
  --insecure            This option explicitly allows insecure SSL
                        connections.
  --no-proxy            Do not use a proxy.
  --password PASSWORD   FortiOS REST API single-use access token.
  --timeout TIMEOUT     Network timeout in seconds. Default: 3 (seconds)

Usage Examples

./fortios-sensor --hostname fortigate-cluster.linuxfabrik.io --password mypass

Output:

Checked 42 sensors, all are ok.

Output (with warnings):

Checked 42 sensors. There are warnings.
* MAC_AVS 1V (0.92 V) is less or equal to a certain threshold (0.9214/0.892)

States

  • OK if all sensor values are within their non-critical thresholds.
  • WARN if any sensor value is <= lower_non_critical or >= upper_non_critical.
  • CRIT if any sensor value is <= lower_critical or >= upper_critical.
  • --always-ok suppresses all alerts and always returns OK.

Perfdata / Metrics

Depends on the hardware sensors present on your appliance. Each sensor is reported by its ID.

Name Type Description
\<sensor-id> Number Sensor reading (e.g. fan.fan1, temperature.cpu_0_core_0, voltage.mac_avs_1v). Thresholds from the appliance.

Credits, License