Difference between revisions of "Watchdog"
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| Maximum number of restarts when an error condition is declared. After this limit is reached, the
| Maximum number of restarts when an error condition is declared. After this limit is reached, the remains in an <code>FAIL=TRUE</code> state until the next successful ping.
If set to 0,
If set to 0, will restart after each FAIL=TRUE
Latest revision as of 15:09, 17 January 2022
Watchdog is a function periodically pinging to one defined IP address or URL. It's periodically checking reply from defined IP device by ping (ICMP). You can monitor physical presence of the IP device or Internet connectivity. You can use several WatchDog functions in parallel.
Based on each Watchdog state one or several RULEs can be executed. Each Rule can perform several actions (Set Output, Short Off (restart) output, Toggle output or send Alarm state to the NETIO Cloud service. Based on this Alarm state can NETIO Cloud send email to defined recipient. All Watchdogs are listed in the JSON protocol wit their current states. It can be used by 3rd party software.
Each Watchdog function state is the
- Watchdog Fail = FALSE = ping answer is OK
- Watchdog Fail = TRUE = ping answer not received
|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 |
|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 |
If set to 0, WatchDog will restart after each FAIL=TRUE is declared (This can cause indefinite restarts when the ping remains unsuccessful).
If set to -1, WatchDog will NOT restart itself again. E.g. it remains in FAIL=TRUE state after it is declared.