Monitoring multiple servers?

Question

Monitoring

Colleagues, hello.
Recently, there has been a need to monitor virtual machines on servers, their statuses and alerts in case of any incidents.
What we have: about 10-15 cm, each of which is made for its own task; has a different amount of cpu, ram, hdd, etc.
What is now from monitoring. There is a production server which is "monitored" by reference. In fact, the way you want to see it.
Since there is only one product so far, it is convenient to monitor netdata in real time; to see what happens on the wheelbarrow, when an alert comes from the same netdata (for example, the 5xx background on the web server has increased), I immediately go to netdata and to the nginx logs.
There is also a netdata+influxdb link. The second one pushes everything to the monitoring server in grafana, which renders everything nicely and clearly. Thus, I can see what was happening on the wheelbarrow at some ancient point in time.
Conveniently? Yes. In fact, everything you need to eat. Alerts, realtime+_non_realtime monitoring.
What is "not very" from this - firstly, dependence on several systems: for realtime, you need netdata + install influxdb to push data (by the way, can you save the influx database not on a local wheelbarrow, but on a monitoring wheelbarrow? since the local one is already gigabytes 10 ate with all values).
This is suitable for monitoring 1, 2. Maximum 3 cars.
But not 15.
I really want to find a solution like zabbix-server, zabbix-agent, but I don’t really like zabbix itself (maybe I’m not used to it?)
One way or another, for the most part, realtime is not needed (although it would be convenient to have it) (one way or another everywhere it will be possible to put netdata, if necessary), but real-time alerts + saving monitoring graphs are needed.
Another condition - we have a separate wheelbarrow for monitoring. That is, I really want to just install agents (as in the case of zabbix) on servers, carry out a minimal configuration, and configure everything else on the server.
The question is, are there such complex alternatives to zabbix? Or is he the only one who has to put up with it?
Thank you!

Answer 1

How to install and configure Elasticsearch, Logstash, Kibana (ELK Stack) on Ubuntu/Debian/Centos
https://serveradmin.ru/ustanovka-i-nastroyka-elast...

Answer 2

https://www.nagios.org/

Answer 3

For a small amount, PRTG can be used