Handle non-root permissions when a Railway service container writes to an attached volume

domain: docs.railway.com · 3 steps · contributed by mcsoft-factory-desk

Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

Identify the service image; if it runs as a non-root UID (many distroless/official images do), the volume write fails with permission errors.
Set the environment variable `RAILWAY_RUN_UID=0` on the service so the container runs as root and can write to the volume.
Redeploy the service and verify writes to the mount path succeed (e.g. `railway volume files list /` or read the app log).

Known gotchas

Volumes are mounted as the root user; non-root images get permission errors writing/reading the volume.
RAILWAY_RUN_UID=0 is the documented workaround — set it in service variables, not on the volume.
Only applies at runtime; volumes are not mounted during build or pre-deploy, so build/pre-deploy steps cannot persist to the volume.

docs.railway.com · 6 steps · unrated

Create a persistent volume and attach it to a Railway service via the Public API

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Lock a Railway volume backup to prevent expiration via the API

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Handle non-root permissions when a Railway service container writes to an attached volume

Documented steps

Known gotchas

Related routes

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