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Latest revisions

# Date Author Comment
2a1737eb 05/10/2013 01:56 pm Klaus Aehlig

Add a test for online rolling reboot scheduling

In the example configuration, the graph constructed by just connecting
primary and secondary instances is two-colorable. However, when taking
conflicting locations of secondary nodes into account, three reboot...
8d38fb72 05/10/2013 01:55 pm Klaus Aehlig

Support online-maintenance in hroller

Make hroller take into account the nodes (redundant) instances
will be migrated to. This be behavior can be overridden by the
--offline-maintenance option which will make hroller plan under
the assumption that all instances will be shutdown before starting...
30fded87 05/10/2013 01:55 pm Klaus Aehlig

Support construction of the graph of all reboot constraints

For online rolling reboots, there are two kind of restrictions. First,
we cannot reboot the primary and secondary nodes of an instance
together. Secondly, two nodes cannot be rebooted simultaneously, if...
2207220d 05/10/2013 01:55 pm Klaus Aehlig

Add option --one-step-only to hroller

Add a new option to hroller to only output information about the first
reboot group. Together with the option --node-tags this allows for the
following work flow. First tag all nodes; then repeatedly compute the
first node group, handle these nodes and remove the tags. In between...
a39779f6 05/10/2013 01:54 pm Klaus Aehlig

Sort reboot groups by size

Make hroller output the node groups not containing the master node
sorted by size, largest group first. The master node still remains
the last node of the last reboot group. In this way, most progress
is made when switching back to normal cluster operations after the...
361f2719 05/10/2013 01:53 pm Klaus Aehlig

Fix expectation in hroller test

Regular expressions are not shell globs. So "any symbol" is expressed
by a dot, not a question mark. In this case, the confusion lead to a
too liberal expectation, hence the test passed. Fix it nevertheless.

Signed-off-by: Klaus Aehlig <>...
5a9c7c34 05/09/2013 05:31 pm Bernardo Dal Seno

Refactor check for exclusive_storage in LUInstanceCreate

The order of evaluation of the conditions is changed, so it's easier to add
more (foreseen) checks for exclusive_storage.

Signed-off-by: Bernardo Dal Seno <>
Reviewed-by: Klaus Aehlig <>
8064c1af 05/09/2013 05:31 pm Bernardo Dal Seno

Refactor disk checks in LUInstanceSetParams

Prereq checks relative disks are grouped together and moved in a separate
method. This reduces the clutter in CheckPrereq().

Signed-off-by: Bernardo Dal Seno <>
Reviewed-by: Klaus Aehlig <>
004398d0 05/07/2013 07:40 pm Klaus Aehlig

Fix lint errors (redundant bracket)

Signed-off-by: Klaus Aehlig <>
Reviewed-by: Guido Trotter <>
62441832 05/07/2013 06:59 pm Klaus Aehlig

Add a test demonstrating the --node-tags option of hroller

The example is a cluster of 6 nodes, paired into 3 group by three
instances. So the whole cluster would need two reboot groups. The two
tags select, in two different ways, one node of each group. So, when...

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