[ClusterLabs] how to set a dedicated fence delay for a stonith agent ?

Dimitri Maziuk dmaziuk at bmrb.wisc.edu
Wed May 10 19:15:03 UTC 2017


On 05/10/2017 01:54 PM, Ken Gaillot wrote:
> On 05/10/2017 12:26 PM, Dimitri Maziuk wrote:

>> - fencing in 2-node clusters does not work reliably without fixed delay
> 
> Not quite. Fixed delay allows a particular method for avoiding a death
> match in a two-node cluster. Pacemaker's built-in random delay
> capability is another method.

Deathmatch is one problem, killing the wrong node (2 nodes, no quorum)
is another. Fixed delay is digimer's attempt to alleviate the latter,
so... apples and fruits not entirely unlike apples.

-- 
Dimitri Maziuk
Programmer/sysadmin
BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu

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