Description of your problem
I would like to see an event triggered if a agent does not connect to the Sensu Go backend within a certain timeframe.
Description of steps you’ve taken to attempt to solve the issue
I have added a configuration for the agent, that is expected to connect and can see it if I run
sensuctl entity list with “Last seen” set to “N/A”. I have tried specifying the keepalive timeout values. However, they only trigger an event if the agent sent an initial keepalive.
Operating system information
- Sensu Go: 6.9.1 CE (built with go1.20.2)
- Etcd: built-in
- PostgreSQL: -
Thank you for your help.
Hello Tofi, hope this finds you well.
There is no built in way to alert on failed agent connectivity. My suggestion(s) would be either a scripted check script as simple as the one below or a scripted api call to grab entities with a last keepalive value of null while the entity has existed for more than n minutes. Then handling the event alert with your preferred handler.
Possible drawback of the log check approach would be the absence of the error in logs due to a low log level, Please make sure to set the log level to debug while testing.
if journalctl -u sensu-backend | grep -q “websocket connection error”; then
Documentation reference links
thank you for your fast reply and the suggested workarounds.
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