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Actor with DATA scope but no durable-dir volumes fail to suspend / pause #1936
Description
The ActorTemplate validations accept onCommit/onPause: DATA with no durable-dirs defined. During suspend or pause, ateom (both microVM and gVisor) fail making the actor go to CRASHED state.
The error message is:
Error: failed to suspend actor: rpc error: code = Internal desc = no durable-dir volumes for DATA snapshot
Is this configuration useful? Should we validate and reject it?
Reacted by ktsoator
Activity
cloudonly commentedon Sep 29, 2026
I checked both checkpoint implementations and would like to add admission validation for this. The check needs to use volumes actually mounted by a container: a declared but unmounted durable-dir still fails the runtime check.
Proposed scope: extend the existing CreateActorTemplate cross-field validator so DATA in
onCommitoronPauserequires a mounted durable-dir. Preserve the current microVM exception for a mounted CSI volume; gVisor currently requires a durable-dir even when CSI volumes are present. FULL snapshots remain valid without durable volumes.I will add validation regression tests for both scopes and runtimes, including missing/unmounted volumes and the CSI exception. The change will stay in admission validation and will not introduce empty snapshot archives or change CSI snapshot implementation.