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I manage an Ubuntu 14.04 LTS server running several guest VMs through KVM/qemu, and I'm asked to log boot, reboot and shutdown times of guests.

Is there a way to catch this kind of events for example in /var/log/syslog?

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  • Have you tried /var/log/libvirt/libvirtd.log ? Commented Feb 6, 2017 at 16:22
  • @AndrewDomaszek Thank for your comment, you put me on the right path: on my system libvirtd.log wasn't helpful, but files in /var/log/libvirt/qemu/ were. I added an answer to help others passing by.
    – gerlos
    Commented Feb 6, 2017 at 16:43

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I found that such events are already logged for each VM in a file named in a way similar to vmname.log, located in /var/log/libvirt/qemu/.

So one can get boot and shutdown times using a command like this:

$ sudo grep -e 'starting up' -e 'shutting down' /var/log/libvirt/qemu/vmname-log

Still can't find a way to get reboot time without looking at guest log files.

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