I now have all these VM’s and physical devices; each usually having their own dashboard or other way of monitoring the resources being used. But it is a pain to look in numerous locations to see how much RAM is being used or that my storage drives are full. I could have kept relying on the Xen Orchestra monitoring features to provide 90% of the solution, but that still wouldn’t address the other physical hardware I have like my switch, wireless AP, etc. So I started looking to 3rd party solutions. My “requirements” are it needs to monitor everything I have, support alerting via email, and be open source. Nearly all my hardware (and software via snmp packages) supports SNMP and Syslog, so getting information out shouldn’t be a problem. Syslog is going to ELSA in my Security Onion vm. This post will focus on SNMP.
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