Docker - Swarm
Which Docker Swarm feature controls how many containers update at once during a rolling update?
Which Docker Swarm feature controls how many containers update at once during a rolling update?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify update control options
The option controlling how many containers update simultaneously is --update-parallelism.Step 2: Eliminate other options
--replicas controls total container count, --restart-condition controls restart behavior, --rollback reverts updates.Final Answer:
--update-parallelism -> Option BQuick Check:
Update batch size = --update-parallelism [OK]
Quick Trick: Use --update-parallelism to set update batch size [OK]
Common Mistakes:
- Confusing --replicas with update batch size
- Using --rollback to control update speed
- Misunderstanding --restart-condition as update control
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