There was added VyOS monitoring feature in 1.3 and 1.4.
Documentation
There are some python scripts (scrappers) that are running by telegraf exec input filter (each 10s, with 10s timeout)
The problem is that sometimes LA elevates up to 1.5 (single core system) with no reasons while running these python scripts by influx's telegraf.
It looks strange because I can not catch the bottleneck. Also I've checked system while LA elevation: there were no unusual CPU, RAM and disk usage.
The only I find out is that LA elevation increasing is caused by running these scripts by telegraf. And I see no strange behavior while running it manually.