While maybe overpowered for what you want, your best option is probably to
run a small-ish vm that can do what you need, including running some real
monitoring tools.  I use either KVM, VirtualBox, VMWare to run them, though
I hate the devils owning the latters.  Usually just need a web server,
database, the app, some libs, and off you go, but doing so in a VM makes it
portable too.  If you can't get a few gig of ram, some cores, and some disk
space, probably barking up the wrong tree yet anyways.  If not useful, nuke
it, start over with another until you do.

I do this both for myself and customers, usually cloning or building like a
linux box running ubuntu installed with various monitoring tools like
opennms for your needs.  Installing OpenNMS is really easy, as is NMIS,
just install an ubuntu or centos in a vm on whatever box you have, 1-2
cores, 4gb ram, as much disk as you want to give it, they tend not to be
too needy.  Using with customers at times I need to up the spec, but I tend
to run multiple tools as well, but still far less than what commercial
tools require.

Any windows/linux boxes to be monitored install/enable snmp agents on, you
can get most of that out of standard snmp system mibs.  Enough at least to
tell you if you need to look closer.  Network devices tend to enumerate
power/fans/temps, etc, linux it's a bit more quirky but can with the proper
agents.  Windoze snmp tends to be ok even with built-in snmp and adding a
gpo to enable it.  Macs probably do, but not a mac dude to care.

Open source there's OpenNMS, Grafana, open-ish tools like NMIS, Nagios,
PRTG in limited capacities, but short list of apps for me to use.  Anyone
that can sell something does, and can't say I always blame them even if the
cheap bastard in me hates it.  It comes down to what it's worth to you, and
a funny thing sometimes between super small business-ish up to billion
dollar companies.

-mb



On Fri, Oct 29, 2021 at 6:20 PM AZ Pete via PLUG-discuss <
plug-discuss@lists.phxlinux.org> wrote:

> Hi All,
>
> I have a growing network of Linux servers in my home network (3 Raspberry
> Pis, 1 Ubuntu, 1 Linux Mint) and am looking for a way that I can monitor
> them remotely.
> Specifically, I'm looking to have a unified dashboard that would list for
> each server:
>
>    - CPU utilization history
>    - Drive space consumed
>    - Temperature monitoring (CPU, chip set, & hard drive temps)
>    - Fan speed monitoring
>    - Some kind of alerting mechanism when a given threshold is passed
>    (i.e. email sent).
>
> These are the most important items, anything else would be a "nice to
> have".
> I've looked into Webmin, Glances, Nagios, Collectd & Cockpit. Mostly these
> seemed to be geared more toward remote admin. But the monitoring that was
> available didn't seem to include the temperature info or the idea of one
> unified dashboard.  I would rather not have to go to a separate admin site
> for each server to check on it's status.
>
> Does anyone have any recommendations for such software, keeping things as
> simple as possible (i.e. Nagios seemed waaayyy to complicated, being an
> enterprise tool).
>
> Thanks,
> Peter
>
>
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