I have a KVM Host with 4 vms running 24/7h. All VMs runs smoothly but at a given time, all 4 VMs stops to ping and after 10 minutes, it continues to run.
I knew that they are not pinging because I have a script that pings them on every 10 minutes in order to warn if they are ok. I don't know if it's just a network problem or if the KVM simply stops to work.
How can I trace or log their current activity using libvirtd/virsh tools in order to find where the bottleneck is?
Watch the CPU/Network graph on GUI console is not an option because the problem occurs between 6 and 7h AM (when we are not on office).