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Scenario #302
Storage
Kubernetes v1.20, Bare Metal
Data Corruption on HostPath Volumes
Multiple pods sharing a HostPath volume led to inconsistent file states and eventual corruption.
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What Happened
Two pods were writing to the same HostPath volume concurrently, which wasn’t designed for concurrent write access. Files became corrupted due to race conditions.
Diagnosis Steps
- 1Identified common HostPath mount across pods.
- 2Checked application logs — showed file write conflicts.
- 3Inspected corrupted data on disk.
Root Cause
Lack of coordination and access control on shared HostPath.
Fix/Workaround
• Moved workloads to CSI-backed volumes with ReadWriteOnce enforcement.
• Ensured only one pod accessed a volume at a time.Lessons Learned
HostPath volumes offer no isolation or locking guarantees.
How to Avoid
- 1Use CSI volumes with enforced access modes.
- 2Avoid HostPath unless absolutely necessary.