On Tue, Apr 02, 2019 at 08:36:59PM +0200, kvaps wrote: > Hello, > > Is there any incompatibility between minor versions of DRBD9 kernel modules? > Eg. should 9.0.14-1 conflict with the 9.0.16-1 version?
They are compatible. And they are in general. We really try hard to have them compatible. On connection a min and max version is exchanged and the nodes agree on a common feature set. > I want to know for choose right upgrading strategy. > - Should I stop all storage replicas before upgrade drbd module or it > can be done online one-by-one? > - Should I force update on drbd clients (diskless replicas) to not > harm storage nodes? The strategy is to move around "stuff" (e.g., live migrate VMs) until a node is free of primaries. Then you "drbdadm down all", upgrade, "drbdamd up all". The only other important constraint is that you can not down such a node if it is the last/only storage provider for a diskless node. drbdadm would not down such a resource. So you might have to temporarily increase the redundancy. But I guess you started with a higher redundancy than 1 anyways. Regards, rck _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user