[Linux-HA] external/SBD and shared storage failure

[Jan]

 Hi All,

just testing the external/sbd stonith agent and I get somehow confused.

The SBD device is on the shared storage, and this is where the poison pill
is offered. What if a failure occurs and one node (or more) cannot access
it? No poison pill can be offered. My guess is that I need to setup:

- a primitive resource for each node (this can be a clone)
- the primitive should be the first resource of the group where other
resources managing data are running. This would protect access to the
storage, similarly to sfex.

Another recommendation could be to create the SBD device on the same shared
data storage (another LUN) and of course, use another STONITH device (PDU or
similar)

Is the scenario drafted correct?

Thanks,
Jan