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** [tickets:#1692] imm: remove IMM coordinator role when last controller goes
down**
**Status:** unassigned
**Milestone:** 5.0.FC
**Created:** Fri Mar 04, 2016 12:58 PM UTC by Zoran Milinkovic
**Last Updated:** Fri Mar 04, 2016 12:58 PM UTC
**Owner:** nobody
Today, in IMM SC absence allowed implementation, there is a limitation of
having 2 payloads when the cluster goes headless (without controllers). The
reason for this is that when the cluster goes headless, IMMND, where is IMM
coordinator, needs to be restarted. If we don't have this limitation and have
only one payload, in this case all data will be lost when IMMND restarts.
When we have 2 payloads, the second payload (veteran node) will allways keep
IMM data, and when controller(s) come back, IMM data sync will be possible
possible.
When the cluster goes headless, instead of restarting IMMND, IMM coordinator
role should be removed from IMMND.
This solution will remove limitation of having at least 2 payload for safely
sync data when controllers come back.
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