On 12/10/18 5:46 AM, Lentes, Bernd wrote:
Hi Jim,
Hi Bernd, I was doing some mail housekeeping and realized I never responded to this message. Apologies for the long delay.
Unfortunately not.
I have some more questions, maybe you can help me a bit. I found http://epic-alfa.kavli.tudelft.nl/share/doc/libvirt-devel-0.10.2/migration.h... , which is quite interesting.
The canonical location of that doc is the libvirt website :-) https://libvirt.org/migration.html
When i migrate with virsh, i use: virsh --connect=qemu:///system migrate --verbose --live domain qemu+ssh://ha-idg-1/system
When pacemaker migrates, it creates this sequence: virsh --connect=qemu:///system --quiet migrate --live domain qemu+ssh://ha-idg-1/system which is quite the same. Do i understand the webpage correctly, is this a "Native migration, client to two libvirtd servers" ?
Yes, that is correct.
Furthermore the document says: "To force migration over an alternate network interface the optional hypervisor specific URI must be provided".
I have both hosts also connected directly to each other with a bonding device using round-robin, and an internal ip (192.168.100.xx). When i want to use this device, which is maybe a bit faster and more secure (directly connected), how do i have to specify that ?
By using the 'migrateuri' parameter. See 'migrate' section of virsh man page for more details.
virsh --connect=qemu:///system --quiet migrate --live domain qemu+ssh://ha-idg-1/system tcp://192.168.100.xx
This example looks correct, where the 'tcp://192.168.100.xx' part is the migrateuri.
Does it have to be the ip from the source or the destination ? Does the source then use automatically use also its device with 192.168.100.xx ?
It is the address of the destination. The destination will select a port if not specified, open a socket for the incoming migration, and provide the address/port to the source so it can connect and send the migration stream. Note that /etc/libvirt/qemu.conf contains some knobs for controlling default migration settings in the qemu driver. Regards, Jim