[DRBD-user] drbd resource fencing

Dominik Klein dk at in-telegence.net
Mon Dec 3 10:59:34 CET 2007

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


I read the recent thread "Suggestion to prevent split brain situation" 
and this link about drbd resource fencing.

I ran a little test. I unplugged the DRBD link and the secondary was 
still upToDate. I tried "drbdadm primary" on the secondary and it was 
refused. After that, the resource was marked outdated.

But now say the primary node fails, not just the DRBD link. How can the 
secondary node become primary when it is marked outdated after having 
lost communication to the primary node?

Doesn't this prevent failover to work?

What did I miss? I cannot imagine this is it.


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