Proxmox application with Librenms

so in april i setup librenms, unfortunatly there was a problem with the proxmox snmp script but recently they fixed it. however i was still having problems running the snmp script as it needed to be run as root.

so after some googling i managed to find out that i need to edit the sudoers file on the proxmox server and add the following line.

snmp ALL=(ALL) NOPASSWD:ALL

this gives snmp root access to be able to run the script.

Source

Hot Adding CPU’s to a linux Virtual Machine

so i wanted to add some more processing power to a vm i am running without restarting it but didnt know how.
a quick google search shows that vmware has created a script to do this for you, but i wanted to know how to do it my self.
so a quick check of the script and it does the following.

lists the idle cpu’s by running the following commmand
ls /sys/devices/system/cpu/ | grep cpu | grep -v idle
in my case this showed cpu2, cpu3
then activating those cpu’s by running
echo 1 > /sys/devices/system/cpu/cpu2
echo 1 > /sys/devices/system/cpu/cpu3
a quick run of htop shows all 4 processes now working correctly without restarting.

don’t you just love linux 🙂

Enjoy