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routeros-scripts/doc/check-health.md
Christian Hesse ff35f0c87f check-health: reverse logic for RAM (free -> utilization)... 
... to bring it in sync with CPU utilization.

Also make the output more verbose, at least for the warning.

---- ✂️ ----
🗃️📈️ Health warning: RAM utilization

The RAM utilization on MikroTik is at 81%!

total:          64 MiB
used:           52 MiB
free:           11 MiB
---- ✂️ ----
🗃️📉️ Health recovery: RAM utilization

The RAM utilization on MikroTik decreased to 65%.
---- ✂️ ----
2023-10-24 17:03:12 +02:00

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Notify about health state

⬅️ Go back to main README

ℹ️ Info: This script can not be used on its own but requires the base installation. See main README for details.

Description

This script is run from scheduler periodically, sending notification on health related events:

  • high CPU utilization
  • high RAM utilization (low available RAM)
  • voltage jumps up or down more than configured threshold
  • voltage drops below hard lower limit
  • power supply failed or recovered
  • temperature is above or below threshold

Note that bad initial state will not trigger an event.

Monitoring CPU and RAM utilization (available processing and memory resources) works on all devices. Other than that only sensors available in hardware can be checked. See what your hardware supports:

/system/health/print;

Sample notifications

CPU utilization

check-health notification cpu utilization high
check-health notification cpu utilization ok

RAM utilization (low available RAM)

check-health notification ram utilization high
check-health notification ram utilization ok

Voltage

check-health notification voltage

Temperature

check-health notification temperature high
check-health notification temperature ok

PSU state

check-health notification psu fail
check-health notification psu ok

Requirements and installation

Just install the script and create a scheduler:

$ScriptInstallUpdate check-health;
/system/scheduler/add interval=53s name=check-health on-event="/system/script/run check-health;" start-time=startup;

ℹ️ Info: Running lots of scripts simultaneously can tamper the precision of cpu utilization, escpecially on devices with limited resources. Thus an unusual interval is used here.

Configuration

The configuration goes to global-config-overlay, these are the parameters:

  • CheckHealthTemperature: an array specifying temperature thresholds for sensors
  • CheckHealthVoltageLow: value (in volt*10) giving a hard lower limit
  • CheckHealthVoltagePercent: percentage value to trigger voltage jumps

ℹ️ Info: Copy relevant configuration from global-config (the one without -overlay) to your local global-config-overlay and modify it to your specific needs.

Also notification settings are required for e-mail, matrix, ntfy and/or telegram.

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