Volumes

Give a service persistent storage that survives deploys and restarts.

Add a volume

Select + Add > Volume and pick a service and mount path, right-click a service and select Attach Volume, or run openrail volume add --mount /data. One volume per service.

The volume is a Docker named volume on the service's host (on the data disk when there is one). It is owned by root; if your app runs as another user and cannot write, set Run as user to 0 in Settings > Deploy (or RAILWAY_RUN_UID=0).

Size

Volumes have no fixed size: they grow into the host disk. The volume panel shows usage and the host's free space. An alert fires at 80% of the host filesystem by default (volume.alertAtPct). To grow, add a bigger data disk.

Deploys

A service with a volume runs 1 replica and has a short gap on every deploy. See Replicas and zero-downtime deploys.

Wipe and delete

• Wipe Volume (type the volume name) stops the service, empties the volume and starts it again.
• Delete volume is a staged change. The data is kept for 48 hours before removal.

Backups

Any volume can be backed up to your bucket with restic. See Backups and restore.