PhotoPrism

What is PhotoPrism

PhotoPrism is an AI-Powered Photos App for the Decentralized Web. It makes use of the latest technologies to tag and find pictures automatically without getting in your way. You can run it at home, on a private server, or in the cloud.

Functionality:

• Browse all your photos and videos without worrying about RAW conversion, duplicates or video formats
• Easily find specific pictures using powerful search filters
• Includes four high-resolution world maps to bring back the memories of your favorite trips
• Play Live Photos by hovering over them in albums and search results
• Recognizes the faces of your family and friends
• Automatic classification of pictures based on their content and location

Setup PhotoPrism

PhotoPrism is currently packaged in the unstable channel. To install it add to your configuration.nix:

  # Photoprism
  services.photoprism = {
    enable = true;
    port = 2342;
    originalsPath = "/var/lib/private/photoprism/originals";
    address = "0.0.0.0";
    settings = {
      PHOTOPRISM_ADMIN_USER = "admin";
      PHOTOPRISM_ADMIN_PASSWORD = "...";
      PHOTOPRISM_DEFAULT_LOCALE = "en";
      PHOTOPRISM_DATABASE_DRIVER = "mysql";
      PHOTOPRISM_DATABASE_NAME = "photoprism";
      PHOTOPRISM_DATABASE_SERVER = "/run/mysqld/mysqld.sock";
      PHOTOPRISM_DATABASE_USER = "photoprism";
      PHOTOPRISM_SITE_URL = "http://sub.domain.tld:2342";
      PHOTOPRISM_SITE_TITLE = "My PhotoPrism";
    };
  };

Notes:

• PhotoPrism can be run on sqlite3 but performance will be horrible. That's why MySQL resp. MariaDB should be used.
• The originalsPath must be set and in required to be inside the /var/lib/private/photoprism directory. Otherwise SystemD will complain. Further below you'll find instruction on howto to effectively store Photoprism and the Originals in another location.
• Instead of providing the admin password as settings, you could also use a password file using services.photoprism.passwordFile
• The address should be 0.0.0.0 to listen to everything.
• You can set a lot more photoprism settings. The complete list of options (except the ones for sponsors) can be found here.
• Because we use the socket for the database, no database user password is required to specify.

Setup MariaDB / MySQL

To setup MariaDB / MySQL with PhotoPrism, you can use a code snippet like the following in your configuration.nix:

  # MySQL
  services.mysql = {
    enable = true;
    dataDir = "/data/mysql";
    package = pkgs.mariadb;
    ensureDatabases = [ "photoprism" ];
    ensureUsers = [ {
      name = "photoprism";
      ensurePermissions = {
        "photoprism.*" = "ALL PRIVILEGES";
      };
    } ];
  };

Notes:

• By default MySQL is used. If you want to use MariaDB instead, use the services.mysql.package = pkgs.mariadb directive.
• By default the data is stored in /var/lib/mysql. If you want to alter the location, use the services.mysql.dataDir directive.
• The ensureDatabases directive ensures that the specified databases exist. Removing such a created database from the list, will not delete it. This means that databases created once through this option or otherwise have to be removed manually. This will ensure, you don't accidentally delete all your PhotoPrism data.
• Make sure that the database user for your PhotoPrism database matches with the one specified in the PhotoPrism settings.

Setup nginx reverse proxy

As Photoprism runs on its own port, you do want to setup a reverse proxy. That way you can omit the port and also use secure connections when accessing it.

  # NGINX
  services.nginx = {
    enable = true;
    recommendedTlsSettings = true;
    recommendedOptimisation = true;
    recommendedGzipSettings = true;
    recommendedProxySettings = true;
    clientMaxBodySize = "500m";
    virtualHosts = {
      "sub.domain.tld" = {
        forceSSL = true;
        enableACME = true;
        http2 = true;
        locations."/" = {
          proxyPass = "http://127.0.0.1:2342";
          extraConfig = ''
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_buffering off;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
          '';
        };
      };
    };
  };

Notes:

• The clientMaxBodySize is the maximum size of a client request body. If this size is exceeded, Nginx returns a 413 Request entity too large HTTP error. This setting is particularly important for uploads especially video files.
• With the proxyPass directive nginx will access PhotoPrism. This way, you can also use SSL certificates (freely issued by Let's Encrypt through the acme protocol).

Storing user data in specific location

NixOS allows you to seperate specific user data from other data that gets accumulated over time. Graham Christensen has written an excellent blog post on how to achieve that with ZFS. This is also possible with other CoW filesystems that have snapshot functionality. Such a setup requires you to specifically opt-in into keeping data.

On of the problem is that PhotoPrism stores it's actual data by default in /var/lib/private/PhotoPrism. SystemD is picky about the /var/lib/private folder. It won't allow symlinks there, but you can actually bind mount folders.

Specify the bind mounts in your /etc/nixos/hard-wareconfiguration.nix like this:

  fileSystems."/var/lib/private/photoprism" =
    { device = "/data/photoprism";
      options = [ "bind" ];
    };

If you want to have the originals folder somewhere else, you can just add it also as seperate bind mount:

  fileSystems."/var/lib/private/photoprism" =
    { device = "/data/photoprism";
      options = [ "bind" ];
    };

  fileSystems."/var/lib/private/photoprism/originals" =
    { device = "/data/originals";
      options = [ "bind" ];
    };