Difference between revisions of "Watchdog"
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If set to 0, the Watchdog will restart the device after each <code>FAIL=TRUE</code> is declared. | If set to 0, the Watchdog will restart the device after each <code>FAIL=TRUE</code> is declared. | ||
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Revision as of 15:14, 22 October 2021
Watchdog is a tool that allows you to ping a given (IP) address using the ping command. In this way, you can eg. monitor the availability of a device connected to the output or connectivity to the Internet.
In case of failure, it is possible to invoke a follow-up rule-based action (see Rules). Output of Watchdog is the variable FAIL. It shows value TRUE when evaluation ends with a failure or FALSE when pinging is successful.
Structure
| Variable | Value | Description |
|---|---|---|
| target | IP / URL | Monitored address |
| pingInterval | int | [s] Time interval between pings |
| timeout | int | [s] Time waiting for answer |
| maxTimeouts | int | Number of failed pings required to evaluate to FAIL=TRUE
|
| timeToReboot | int | [s] Time the Watchdog waits after announcing an error condition before starting a new cycle |
| maxRestarts | int | Maximum number of restarts when an error condition is declared. After this limit is reached, the Watchdog remains in an FAIL=TRUE state until the next successful ping.
If set to 0, the Watchdog will restart the device after each |
