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Latest revisions

# Date Author Comment
2becae3f 07/06/2013 07:13 pm Dimitris Aragiorgis

Hotplug: KVM support

KVM >= 1.0 is needed.

Introduce new method HotplugDevice() and HotAddNic/HotDelNic,
HotAddDisk/HotDelDisk helper methods that eventually make use of
QEMU monitor interface for hotpluging.

Only paravirtual devices are hotplug-able. QEMU monitor expects them...
cba4819e 07/04/2013 03:52 pm Dimitris Aragiorgis

Add hotplug design doc

Signed-off-by: Dimitris Aragiorgis <>
63e52d34 07/04/2013 03:52 pm Dimitris Aragiorgis

Hotplug: objects.py additions

Add pci slot in NIC/Disk objects. This slot will be used only
by hypervisor code. Currently only KVM will use it and store it
temporarily in runtime files.

Signed-off-by: Dimitris Aragiorgis <>
ed74dde5 07/01/2013 10:53 am Klaus Aehlig

Add test for the --full-evacuation option

In this example cluster, there are four pairs of nodes, each hosting
two instances. Each node has disk capacity for an additional instance.
Therefore, for normal online rolling reboots, there are two node groups,...
a12b230c 07/01/2013 10:53 am Klaus Aehlig

hroller: option --full-evacuation

Add an option to hroller, to plan for full evacuation of the
nodes to be rebooted, i.e., also plan for replacement secondary
nodes for all instances on the node after migrating out instances
with this node as primary.

Signed-off-by: Klaus Aehlig <>...
fdbdeaa3 07/01/2013 10:53 am Klaus Aehlig

Extract a partition functional

Separate the partitionNonRedundant function in hroller into a
general functional that partitions a list of nodes according
to some clearing strategy and the specialization of moving
non-redundant instances out. In this way, we don't have to...
a947a583 07/01/2013 10:53 am Klaus Aehlig

Extract functional for greedily clearing nodes

The method clearNodes in hroller greedily clears nodes of
non-redundant instances by moving them to a different node. This patch
separates the greedy clearing algorithm from the specialization to
non-redundant instances; in this way, we don't have to duplicate code...
634a1460 07/01/2013 10:52 am Klaus Aehlig

Make hroller not consider offline nodes for evacuation

When planing on where to evacuate the non-redundant instances
of the nodes to be rebooted, it doesn't make sense to consider
offline nodes. So add this restriction to hroller.

Signed-off-by: Klaus Aehlig <>...
a8cbe1d7 07/01/2013 10:52 am Klaus Aehlig

Update comments in hroller code

hroller schedules moves of instances to have rebooted nodes
free of instances with this node as primary. Update the comments
to reflect that this move planning is for non-redundant instances
only.

Signed-off-by: Klaus Aehlig <>...
8e4230a8 07/01/2013 10:52 am Klaus Aehlig

Clarify meaning of --print-moves in hroller man page

When given the option --print-moves, hroller prints a list of
instance relocations after each reboot group. This sequential
presentation can lead to the wrong impression, that these are
all the moves to be carried out. Therefore, explicitly mention...

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