To install munin node on Ubuntu/Debian, run
apt install -y munin-node
To configure, edit file
vi /etc/munin/munin-node.conf
Find
allow ^127\.0\.0\.1$
Below this line, you need to add IP of your Munin Master. You need to convert IP to regular expression format before adding. For example, if your IP is 88.212.32.35, you need to add
allow ^88\.212\.32\.35$
If you want to allow from any IP, add
allow ^.*$
Now restart Munin node
systemctl restart munin-node
Add Node to Munin Master
You need to tell your Munin master about the new node you have installed. To do this, edit file
vi /etc/munin/munin.conf
In this file, add
[hostname-of-new-node-server]
address IP_ADDR_OF_NODE
use_node_name yes
Now you need to wait like 5 minutes for Munin master to fetch the data. Munin master run the command /usr/bin/munin-cron to fetch data from every configured nodes.
If you have any problem with updating data, check the log files for more info.
/var/log/munin/munin-update.log => is the log file for munin master.
/var/log/munin/munin-node.log => is the log file for munin node.
Make sure you can connect to port 4949 of node server from master. If any firewall blocking, you need to open the port for munin to fetch the data.
root@monitor:~# nc 82.211.1.93 4949 # munin node at root1272.premium-rootserver.net # Unknown command. Try cap, list, nodes, config, fetch, version or quit quit root@monitor:~#