Electricity consumption not shown on Ubuntu KVM

[ivan-koryshkin]

Bug description

I'm trying to set up an electricity consumption collection using "scaphandre" from the Green Software Foundation repository.
I noticed that the documentation states that the program works both with virtual machines and with bare-metal ones. I was successfully able to set it up on real machines.
But it doesn't work with virtual machines.
I have a virtual machine with kvm virtualization, but "scaphandre" shows power consumption equal to 0 (screenshot 2). Although the same powertop works well (screenshot 1).

To Reproduce

run on virtual machine (VDS-KVM)
sudo docker run -v /sys/class/powercap:/sys/class/powercap -v /proc:/proc -ti hubblo/scaphandre stdout -t 15

Expected behavior

Electricity consumption shown

Screenshots

Environment

Type: VDS-KVM
System: Ubuntu 5.4.0-29-generic

[bpetit]

Hi,

Did you follow this procedure ? https://hubblo-org.github.io/scaphandre-documentation/how-to_guides/propagate-metrics-hypervisor-to-vm_qemu-kvm.html

Do you have a working scaphandre with qemu exporter on the physical machine ?

Without this it wont work as we need real rapl metrics from the host to be transmited to the agent inside the vm.

Would be interesting to see how powertop estimates energy in this context though

[ivan-koryshkin]

As far as I understand this method for domain owners, I have only a few virtual machines, I have no access to the domain. Please correct me if I'm wrong

[bpetit]

You're right, it's made for bare metal machine owners / private cloud staff / ...

Scaphandre doesn't provide (yet) a mean to evaluate the power usage on a virtual machine without gathering metrics from the bare metal host first.