Alerts
An alert is triggered when a device metric (e.g., ping, CPU usage) crosses its configured threshold for a specified duration (tolerance). A recovery alert is sent when the metric returns to normal.
Alerts are based on Alert Settings defined for each metric, each setting includes:
Operator: defines the condition to evaluate the metric value:
Greater than: triggers when the value exceeds the threshold.
Less than: triggers when the value is below the threshold.
Threshold: the metric value that triggers the alert.
Tolerance: the duration (in minutes) the threshold must be continuously breached before triggering an alert. Helps reduce noise from flapping metrics.
OpenWISP Monitoring provides built-in alerts for the following metrics:
Note
You can override the default alert settings globally using the OPENWISP_MONITORING_METRICS setting, or on a per-device basis as explained in the Device Checks & Alert Settings section.
Ping
Triggers when the device becomes unreachable via ping. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Note
The Ping check should be enabled for the device to receive this alert.
Config Applied
Triggers when the device fails to apply configuration changes within the specified time. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Note
The Configuration Applied check should be enabled for the device to receive this alert.
Data Collected
Triggers when no metric data has been collected from the device. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Note
The Monitoring Data Collected check should be enabled for the device to receive this alert.
CPU Usage
Triggers when CPU usage exceeds the threshold. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Memory Usage
Triggers when memory usage exceeds the threshold. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Disk Usage
Triggers when disk usage exceeds the threshold. This alert is enabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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WiFi Clients (Max)
Triggers when the number of connected WiFi clients exceeds the threshold. This alert is disabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Note
The WiFi Clients check should be enabled for the device to receive this alert.
WiFi Clients (Min)
Triggers when the number of connected WiFi clients falls below the threshold. This alert is disabled by default.
Default Alert Settings:
Operator |
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Threshold |
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Tolerance |
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Note
The WiFi Clients check should be enabled for the device to receive this alert.