Kevin Anderson wrote:
Actually 3 nodes down to 1 node using IP tie breaker. No shared storage so I can't use Qdisk. Was resorting to ping test to stop fencing from broken node.
Also, you mention lingering issues about openais, but didn't see anything in your posts that describe any problems in that space. Can you be more specific?During network partition test, expecting a fencing race where I control the outcome, one node would not fence the other and did not takeover the service until the other node attempted to rejoin the cluster (way too late).
Another poster stated that he could not get the cluster to function properly since the switch to Openais. Hence I'm speculating that they are related.
If you guys are serious then I have some suggestions:
Interactive documentation so the community can contribute.
Debugging mode option at the top of cluster.conf which will cause "Every" component to verbosely contribute to a separate log file which can be sent in to to be analyzed. A limited community size because of the niche nature of the system, calls for extra debugging effort.
An interactive design document for Cluster Suite where users can make suggestions for changes and vote for new features. In the process of exploring ways to get my setup working I kept finding ways and roadblocks. It's an involved product and process and I personally don't have any way to contribute to a design discussion.
For example, am I the only one who would benefit from ssh support in the fence agents? Or would that help many others also.
Another example, during the process I realized that the redundant power and redundant network connections I set up to "Keep Things Working" actually had a negative impact on the reliability of fencing. This is OK because lack of ability to fence doesn't stop the cluster as long as a fencing ability failure is detected and fixed in a timely manner. So I setup an hourly cron script to test communications to the power switches. Would others benefit from that feature? Should it be included?
How about a bigger question, is that already a feature? I think Heartbeat has fence device status monitoring but without an organized, easy to navigate design document for Cluster Suite I don't know if that's a feature of it or not.