Fix cluster verification issues on multi-group clusters
This patch attempts to fix a number of issues with “gnt-cluster verify”
in presence of multiple node groups and DRBD8 instances split over nodes
in more than one group.
- Look up instances in a group only by their primary node (otherwise
split instances would be considered when verifying any of their node's
groups)
- When gathering additional nodes for LV checks, just compare instance's
node's groups with the currently verified group instead of comparing
against the primary node's group
- Exclude nodes in other groups when calculating N+1 errors and checking
logical volumes
Not directly related, but a small error text is also clarified.
Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>