[BUG] Decypharr downloads fail with "timeout waiting for mount files" after #23 fix

[benharvey1985]

Describe the bug

After the fix for #23 (commit [de0fcad]), Decypharr no longer crash-loops, but the rclone FUSE mount never establishes. All downloads end up in error state with:

Error running post-download action error="timeout waiting for mount files: ... last scan error: open /mnt/remote/torbox/all/... no such file or directory"

Root Cause

The user: "${PUID:-1000}:${PGID:-1000}" directive added in #23 causes the container to run as UID 1000 directly, but there is no /etc/passwd entry for that UID in the Decypharr image. When fusermount3 tries to resolve the username, it fails:

fusermount3: could not determine username

This prevents the rclone WebDAV mount from mounting, so all symlinks point to non-existent files.

To Reproduce

1. Run setup and start services (Jellyfin or Plex)
2. Request any media via Seerr/Radarr/Sonarr
3. Sonarr/Radarr sends the torrent to Decypharr
4. Torbox downloads complete
5. Decypharr creates symlinks but mount is absent → files unresolvable → error state

Expected behavior

Decypharr should successfully mount the WebDAV filesystem via rclone and create working symlinks that Sonarr/Radarr can import.

Fix applied locally

The issue is that the Decypharr entrypoint runs as non-root (UID 1000) and id -un returns empty because no user exists for that UID. The fix is to add a user entry to the image:

dockerfile
FROM ghcr.io/sirrobot01/decypharr:v2.4
RUN adduser -u 1000 -D -H -s /bin/sh appuser

This preserves the non-root runtime (fixes #23) while giving fusermount3 a resolvable username so the FUSE mount works.

System Information:

• OS: Ubuntu 26.04 LTS
• Docker version: latest
• Script version: 1.1.0
• Media Server: Jellyfin
• Decypharr image: v2.4

Logs
fusermount3: could not determine username
failed to mount FUSE fs: fusermount: exit status 1
Followed by repeated:
Error running post-download action error="timeout waiting for mount files"
After applying the fix:
Successfully mounted rclone filesystem

[nordicnode]

Thanks for the detailed report @benharvey1985 — great root cause analysis and the locally-verified fix made this straightforward to implement. 🙏

This has been fixed in #25 (merged). Here's a summary of what changed:

Root cause: The user: "${PUID}:${PGID}" directive from #23 runs Decypharr as UID 1000, but the upstream image has no /etc/passwd entry for that UID. fusermount3 calls id -un before mounting any FUSE filesystem — with no matching passwd entry it exits immediately, preventing the rclone WebDAV mount from ever establishing.

Fix: A thin Dockerfile.decypharr was introduced that extends the upstream image with a single adduser call:

RUN adduser -u 1000 -D -H -s /bin/sh appuser

This preserves non-root execution (keeps the #23 fix intact) while giving fusermount3 a resolvable username. The Decypharr image was also bumped to v2.4 in the same change.

To pick up the fix, pull the latest and rebuild:

git pull
docker compose build decypharr
docker compose up -d