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Latest revisions

# Date Author Comment
74685117 05/13/2013 04:20 pm Michele Tartara

Add dependency on the process library

The tests are already using this library, so it's not really a new build
dependency, but it was not specified esplicitly.

Furthermore, it's going to be used by the instance status collector, so it's
added to the requirements for the monitoring subsystem....

74b25887 05/13/2013 04:20 pm Michele Tartara

Add HS functions for getting the instance reason path

The getInstReasonFilename is built to resemble the python corresponding
function.

Signed-off-by: Michele Tartara <>
Reviewed-by: Klaus Aehlig <>

b24e516d 05/13/2013 03:47 pm Klaus Aehlig

Add example for online rolling reboots using tags

While this use case was described in the design document, and
mentioned several times as motivation for changes in commit messages,
it has never been added to a user-facing documentation. This commit
adds at least an example to the man page....

7b2d4001 05/10/2013 02:56 pm Klaus Aehlig

Extend hroller test to also verify tag-based node selection

While the multiple-tags test was added to verify that coloring is done
only after node selection (otherwise it wouldn't be possible to get in
both cases a single reboot group), it can easily be extended to also...

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 <>...

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