On Tue, Feb 15, 2011 at 11:51:15AM +0100, René Nussbaumer wrote: > This command came up in a local discussion about how much logic we > should put into gnt-node power off. We decided to go with a separate > convenience command which takes care of all the steps through the > procedures to turn down the cluster into a state suitable for a shutdown > of the underlying machine. > --- > doc/design-oob.rst | 23 +++++++++++++++++++++++ > 1 files changed, 23 insertions(+), 0 deletions(-) > > diff --git a/doc/design-oob.rst b/doc/design-oob.rst > index 1e78c1a..43ef40f 100644 > --- a/doc/design-oob.rst > +++ b/doc/design-oob.rst > @@ -52,6 +52,29 @@ New ``gnt-cluster`` Parameter > | Parameters: ``--oob-program`` > | Options: ``--oob-program``: executable OOB program (absolute path) > > +New ``gnt-cluster epo`` Command > ++++++++++++++++++++++++++++++++ > + > +| Program: ``gnt-cluster`` > +| Command: ``epo`` > +| Parameter: ``--on`` > +| Options: ``--on``: By default epo turns off, with ``--on`` it tries to get > the > +| cluster back online
Add --confirm-shutdown so that the command can be run non-interactively. > + > +This is a convenience command to allow easy emergency power off of a whole > +cluster or part of it. It takes care of all steps needed to get the cluster > into > +a sane state to turn off the nodes. > + > +With ``--on`` it does the reverse and tries to bring the rest of the cluster > back > +to life. > + > +.. note:: > + The master node is not able to shut itself cleanly down. Therefore, this > + command will not do all the work on single node clusters. On multi node > + clusters the command tries to find another master or if that is not > possible > + prepares everything to the point where the user has to shutdown the master > + node itself alone this applies also to the single node cluster > configuration. Sorry, what do you mean, "tried to find another master"? Do you mean doing a master failover if we try to shutdown current node group? iustin
