Fix file exists error when restoring remote snapshot after unexpected… by wswsmao · Pull Request #2091 · containerd/stargz-snapshotter (original) (raw)

After PR #2076, in scenarios where the process restarts unexpectedly (such as due to OOM), restoring a remote snapshot may fail if the target directory already exists. For example:

{"error":"failed to create new snapshotter: failed to restore remote snapshot: failed to create remote snapshot directory: sha256:52fa3204fe00dd4d492873408e2ef89c13e142748931086998cc2eca69549b48: mkdir /var/lib/containerd-stargz-grpc/snapshotter/snapshots/1: file exists","level":"fatal","msg":"failed to configure snapshotter","time":"2025-07-23T12:48:12.070612675Z"}

This PR adjusts the logic in restoreRemoteSnapshot so that if mkdir fails because the directory already exists, it is treated as a result of an ungraceful shutdown and the process continues.