You have a PersistentVolumeClaim with accessModes set to [ReadWriteOnce]. What will happen if two pods on separate nodes attempt to mount this volume for writing at the same time?
medium📝 Predict Output Q4 of 15
Kubernetes - Persistent Storage
You have a PersistentVolumeClaim with accessModes set to [ReadWriteOnce]. What will happen if two pods on separate nodes attempt to mount this volume for writing at the same time?
AThe volume will be mounted as read-only on both pods.
BBoth pods will mount the volume and write data without issues.
CBoth pods will mount the volume but only one can write; the other is read-only.
DOnly one pod will successfully mount the volume; the other will fail to mount.
Step-by-Step Solution
Solution:
Step 1: Understand ReadWriteOnce
ReadWriteOnce means the volume can be mounted as read-write by only one node at a time.
Step 2: Analyze multi-node mount attempt
When two pods on different nodes try to mount the same volume with ReadWriteOnce, only one node can succeed.
Final Answer:
Only one pod will successfully mount the volume; the other will fail to mount. -> Option D
Quick Check:
ReadWriteOnce restricts write access to a single node [OK]
Quick Trick:ReadWriteOnce = single node write access only [OK]
Common Mistakes:
Assuming multiple nodes can write simultaneously with ReadWriteOnce
Confusing ReadWriteOnce with ReadWriteMany
Thinking volume mounts as read-only on second node
Master "Persistent Storage" in Kubernetes
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