38. Docker Quorum
##SWARM QUORUM
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Key Points:
Majority of manager nodes in a swarm.
More than half of the manager nodes in a swarm.
Better having odd number of managers in a swarm
##Key points to remember:
More manager nodes affect the performance of swarm.
Immediately replace failed manager node.
Distribute manager nodes across Availability Zone (AZ) for High Availability (HA).
Take swarm backup.
Reference Doc:
https://docs.docker.com/engine/swarm/...
https://docs.docker.com/engine/swarm/...
https://docs.docker.com/ee/ucp/admin/... nodes/
