Docker / Volumes, Filesystems & Recovery
Use tmpfs only for data that can disappear with container lifecycle
A tmpfs mount stores temporary runtime data rather than a persistent backup copy. Resource and security implications depend on platform configuration.
Environment and inputs: Docker Engine · Compose v2 and Buildx where specified; Linux containers unless noted. Verify daemon context, installed feature support and authorized host or Swarm manager access first.
Start with this check
Confirm the environment and replace sample objects, namespaces, images, paths and hosts with approved targets. Share only relevant, sanitized output. Follow the workload owner’s process for changes.
docker container inspect --format '{{json .HostConfig.Tmpfs}} {{json .Mounts}}' appRead the result
The configuration identifies applicable temporary mounts. Memory-backed storage can contribute to host or container resource pressure depending on the setup.
Resolve and verify
Classify the data's lifetime and capacity needs, then use an approved bounded temporary mount or durable volume as appropriate. Test restart behavior safely.
Before changing production
Do not store the only copy of business data in tmpfs or assume memory-backed content can never reach swap under every host configuration.