Hi Richard, what is the license for virt-what, virt-df, virt-tools?
Thanks -a On Tue, Jun 7, 2011 at 11:06 AM, Richard W.M. Jones <[email protected]>wrote: > 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 >
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