Tools - munin
Installation
Before installing Munin on server01 apache2 will need to be installed. The default configuration is fine for running a munin server. For more information see the Apache2 Web Server guide.
First, on server01 install munin. In a terminal enter:
sudo apt install munin
Now on server02 install the munin-node package:
sudo apt install munin-node
Configuration
On server01 edit the /etc/munin/munin.conf adding the IP address for server02:
## First our "normal" host.
[server02]
address 172.18.100.101
Note
Replace server02 and 172.18.100.101 with the actual hostname and IP address for your server.
Next, configure munin-node on server02. Edit /etc/munin/munin-node.conf to allow access by server01:
allow ^172\.18\.100\.100$
Note
Replace ^172\.18\.100\.100$ with IP address for your munin server.
Now restart munin-node on server02 for the changes to take effect:
sudo systemctl restart munin-node.service
Finally, in a browser go to http://server01/munin, and you should see links to nice graphs displaying information from the standard munin-plugins for disk, network, processes, and system.
Note
Since this is a new install it may take some time for the graphs to display anything useful.
Additional Plugins
The munin-plugins-extra package contains performance checks additional services such as DNS, DHCP, Samba, etc. To install the package, from a terminal enter:
sudo apt install munin-plugins-extra
Be sure to install the package on both the server and node machines.
References
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See the Munin website for more details.
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Specifically the Munin Documentation page includes information on additional plugins, writing plugins, etc.