Monitoring with Zabbix

Zabbix reads the metrics of Lunedo with an HTTP agent item and splits them with Prometheus preprocessing; no template is needed. monitoring.md lists every metric and explains the token.

1. Create a host for the instance and a macro {$LUNEDO.METRICS.TOKEN} of the type secret text with the metrics token.

2. Add a master item of the type HTTP agent: URL http://lunedo:3000/metrics, request type GET, header Authorization with the value Bearer {$LUNEDO.METRICS.TOKEN}, type of information Text, update interval 1m, history Do not store (only the dependent items keep values).

3. Add a dependent item per value with Prometheus pattern as its first preprocessing step and value as result processing, for example:

   Item	Key (your choice)	Pattern	Type
   Storage used	storage.used	lunedo_storage_usage_ratio	Numeric (float); add the preprocessing step Custom multiplier 100 for percent
   Storage level	storage.level	lunedo_storage_level	Numeric (unsigned)
   Last backup	backup.last	lunedo_backup_last_success_timestamp_seconds	Numeric (unsigned), unit unixtime
   Failed mails	mail.undelivered	lunedo_mail_undelivered_total	Numeric (unsigned), then the preprocessing step Change per second or Simple change
   Maintenance mode	maintenance	lunedo_maintenance_mode	Numeric (unsigned)
   Collaboration server	collab.up	lunedo_collab_up	Numeric (unsigned)
   Version	version	lunedo_build_info, result processing label with the label version	Character

4. For the job queues, add a discovery rule as a dependent item with the preprocessing Prometheus to JSON and the pattern lunedo_jobs{state="failed"}, the LLD macro {#QUEUE} from $.labels['queue'], and an item prototype with the pattern lunedo_jobs{queue="{#QUEUE}",state="failed"}.

5. Add triggers with the thresholds of the Prometheus alerts, for example, for a host named lunedo, now() - last(/lunedo/backup.last) > 26h and last(/lunedo/storage.level) >= 1.

Use the address inside the network, not the public address of the reverse proxy. The host itself (CPU, memory, disk of the volumes) is monitored by the Zabbix agent as usual.