Revision d52d41de
| ID | d52d41de85348cbf9c18156e122718471d4bbf1f |
htools: add node-evacuation of DRBD all nodes
This is much more complicated than either change primary (which is
trivial) and change secondary (which is also simple).
The main strategy is:
- choose a new secondary (that will become the final primary) and
replace-disks to it
- failover
- choose a new secondary again (this will be the final secondary)
However, if the original primary was offline, then we first have to
failover to the secondary of the instance.
Note: currently this evacuation mode, while producing correct
evacuation results, does not result in optimal placement of the
instance; it will need attention and possibly an algorithm change.
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>
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