Hello,
On Linux hosts running systemd, we can have a global status of all services (as seen by systemd) using systemctl is-system-running.
The man page give 8 possible values:
| Name | Description |
|---|---|
| initializing | Early bootup, before basic.target is reached or the maintenance state entered |
| starting | Late bootup, before the job queue becomes idle for the first time, or one of the rescue targets are reached. |
| running | The system is fully operational. |
| degraded | The system is operational but one or more units failed. |
| maintenance | The rescue or emergency target is active. |
| stopping | The manager is shutting down. |
| offline | The manager is not running. Specifically, this is the operational state if an incompatible program is running as system manager (PID 1). |
| unknown | The operational state could not be determined, due to lack of resources or another error cause. |
On a well configured host, the normal value must be “running” and a “degraded” value deserve an alert.
Sending this value through snmpd is easy, a small wrapper can give a numeric value to each different value if necessary.
Short term: is there a OID of a similar object I can use to make LibreNMS read, store and alert on this value? Or can I use a private OID for that and configure LibreNMS to use it? I don’t know where to search.
Long term: If it looks useful to others, how can this be added to LibreNMS?