On Mon, Jun 06, 2011 at 06:13:59PM -0400, al pat wrote: > I was looking at replacing vmware in our appliance with kvm and wanted to > get a feel for some > of the utilities vmware provides that I will need to have equivalent > function in kvm/qemu environment. > > I had a few question, and was looking at some help/pointers to investigate > further: > > 1. How to send log files to host log? I can use syslog for event reporting, > but is there a way, I can move a file from guest to host?
It's best (and most secure) to send logs to a remote server in real time. Standard syslog can do this. Just treat your virtual machines like networked real machines, and you won't go far wrong. > 2. guest to host communication - logging messages (probably to appear in a > host log file), providing guest information like guest name, IP address etc You can set up an ordinary TCP/IP network connection or a virtio-serial connection. There are about a dozen different options for guest to host communications: http://libvirt.org/formatdomain.html#elementsConsole > 3. Is there a way for the host to execute programs/scripts in guest? Again, thinking of this from a network point of view, just use 'ssh'. It's widely available and secure. > Looking for things like power down of guest You can send an ACPI signal to the guest which (if the guest is listening) will power it off: http://virt-tools.org/learning/start-vm-with-virt-manager/ > 4. Is there a way to have heartbeat message between host and guest? Depends what you want the heartbeat to do. A watchdog maybe? We support them in qemu and KVM: https://secure.wikimedia.org/wikipedia/en/wiki/Watchdog_timer https://rwmj.wordpress.com/2010/03/03/what-is-a-watchdog/ > 5. Way for host to find the process and network information about the guest virt-top It depends on exactly what information you want to find out. Using ordinary network methods is best if you have a lot of detailed information to collect from the guest, eg. using collectd. http://collectd.org/ > 6. how to find "hostid" of the guest in host? Not sure what you mean by "hostid". The UUID and MAC address is available through libvirt, eg: virsh dumpxml Guest | grep '<uuid>' The hostname is accessible from virt-inspector. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top _______________________________________________ virt-tools-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/virt-tools-list
