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).
I've alread read similar solutions 593140 and 184816 but I was looking for a libvirt or virsh solution instead of install a monitoring tool on each guest.
If you are using qemu, please check this link you can use by own way to dig the exact issues https://qemu.weilnetz.de/doc/qemu-doc.html#Commands, and yeah of course logs are good place to find issues on host. Hope it will help.