fix(test): mount model-cache PVC on v1beta1 pod templates

[galletas1712]

Summary

• Follow-up to ci(checkpoint): mount shared model-cache PVC in DynamoCheckpoint tests #12400: DynamoCheckpoint CI uses v1beta1 DGDs, but mount_model_cache_pvc only wrote legacy volumeMounts, so checkpoint source pods never inherited the Azure model cache.
• Mount the PVC onto native podTemplate volumes/volumeMounts (including non-main checkpoint target containers) and set HF_HOME accordingly.
• Unit coverage for the v1beta1 mount path.

Depends on #12400 (stacked). Does not include the vLLM os._exit capture change — that stays in #12184.

Validation

• Unit tests for managed_deployment v1beta1 mount path
• With ci(checkpoint): mount shared model-cache PVC in DynamoCheckpoint tests #12400, vLLM DynamoCheckpoint deploy CI uses cache instead of HF download

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Summary by CodeRabbit

• New Features

  • Added optional shared model-cache support for checkpoint and restore deployments.
  • Deployments can mount a shared model cache at a configurable path.
  • Improved support for checkpoint target containers when configuring model-cache mounts.

• Bug Fixes

  • Preserved compatibility across deployment schema versions.
  • Added validation for missing checkpoint target containers to prevent invalid deployments.

• Tests

  • Added coverage for model-cache mounting, schema compatibility, idempotent configuration, and validation errors.

[galletas1712]

Not needed — #12400 was restored to the narrow PVC-only change; the expanded tip had inadvertently picked up #12184's snapshot exit fix (plus extra test harness work). Closing this split.

[coderabbitai]

Caution

Review failed

The pull request is closed.

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📥 Commits

Reviewing files that changed from the base of the PR and between 0caba6a and 53dacc0.

📒 Files selected for processing (4)

• .github/workflows/pr.yaml
• tests/deploy/test_dynamocheckpoint.py
• tests/utils/managed_deployment.py
• tests/utils/test_managed_deployment.py

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Walkthrough

Shared model-cache server, path, and PVC settings are now propagated through DynamoCheckpoint CI workflows and deployment tests. Deployment utilities support schema-specific PVC mounting, checkpoint target containers, idempotence, and validation for v1beta1 while retaining v1alpha1 behavior.

Changes

Shared model-cache checkpoint flow

Layer / File(s)	Summary
Schema-aware PVC mounting tests/utils/managed_deployment.py, tests/utils/test_managed_deployment.py	v1beta1 deployments mount the PVC through pod-template volumes and container mounts, set HF_HOME, validate checkpoint target containers, and preserve existing v1alpha1 fields.
Checkpoint deployment integration tests/deploy/test_dynamocheckpoint.py	Checkpoint spec generation accepts optional PVC and mount settings, omits conflicting container-level HF_HOME, and forwards pytest configuration.
CI model-cache wiring .github/workflows/pr.yaml	vLLM, SGLang, and TRTLLM setup and deploy steps pass model-cache endpoint settings and conditionally enable the model-cache PVC.

Estimated code review effort: 3 (Moderate) | ~20 minutes

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.