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24 lines
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24 lines
2.2 KiB
Markdown
Executable File
# Managing File Permissions for NetAlertX on Nginx with Docker
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> [!TIP]
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> If you are facing permission issues, try to start the container without mapping your volumes. If that works, then the issue is permission related. You can try e.g., the following command:
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> ```
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> docker run -d --rm --network=host \
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> -e TZ=Europe/Berlin \
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> -e PUID=200 -e PGID=200 \
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> -e PORT=20211 \
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> ghcr.io/jokob-sk/netalertx:latest
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> ```
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NetAlertX runs on an Nginx web server. On Alpine Linux, Nginx operates as the `nginx` user (if PUID and GID environment variables are not specified, nginx user UID will be set to 102, and its supplementary group `www-data` ID to 82). Consequently, files accessed or written by the NetAlertX application are owned by `nginx:www-data`.
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Upon starting, NetAlertX changes nginx user UID and www-data GID to specified values (or defaults), and the ownership of files on the host system mapped to `/app/config` and `/app/db` in the container to `nginx:www-data`. This ensures that Nginx can access and write to these files. Since the user in the Docker container is mapped to a user on the host system by ID:GID, the files in `/app/config` and `/app/db` on the host system are owned by a user with the same ID and GID (defaults are ID 102 and GID 82). On different systems, this ID:GID may belong to different users, or there may not be a group with ID 82 at all.
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Option to set specific user UID and GID can be useful for host system users needing to access these files (e.g., backup scripts).
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### Permissions Table for Individual Folders
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| Folder | User | User ID | Group | Group ID | Permissions | Notes |
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|----------------|--------|---------|-----------|----------|-------------|---------------------------------------------------------------------|
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| `/app/config` | nginx | PUID (default 102) | www-data | PGID (default 82) | rwxr-xr-x | Ensure `nginx` can read/write; other users can read if in `www-data` |
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| `/app/db` | nginx | PUID (default 102) | www-data | PGID (default 82) | rwxr-xr-x | Same as above |
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