nixos.server/modules/containers/paperless-ngx/container.nix

{moduleWithSystem, ...}: {
  flake.nixosModules.containerPaperless = moduleWithSystem ({pkgs, ...}: {config, ...}: {
    virtualisation.oci-containers.containers."paperless-ngx-broker" = {
      image = "docker.io/valkey/valkey:9-alpine";
      volumes = [
        "/containers/paperless-ngx/redisdata:/data:rw"
      ];
      log-driver = "journald";
      extraOptions = [
        "--network-alias=broker"
        "--network=paperless-ngx_default"
      ];
    };
    systemd.services."podman-paperless-ngx-broker" = {
      serviceConfig = {
        Restart = pkgs.lib.mkOverride 90 "always";
      };
      after = [
        "podman-network-paperless-ngx_default.service"
      ];
      requires = [
        "podman-network-paperless-ngx_default.service"
      ];
      partOf = [
        "podman-compose-paperless-ngx-root.target"
      ];
      wantedBy = [
        "podman-compose-paperless-ngx-root.target"
      ];
    };
    virtualisation.oci-containers.containers."paperless-ngx-db" = {
      image = "docker.io/library/postgres:18";
      environmentFiles = [config.sops.templates."paperless.env".path];
      environment = {
        "POSTGRES_DB" = "paperless";
        "POSTGRES_USER" = "paperless";
      };
      volumes = [
        "/containers/paperless-ngx/pgdata:/var/lib/postgresql:rw"
      ];
      log-driver = "journald";
      extraOptions = [
        "--network-alias=db"
        "--network=paperless-ngx_default"
      ];
    };
    systemd.services."podman-paperless-ngx-db" = {
      serviceConfig = {
        Restart = pkgs.lib.mkOverride 90 "always";
      };
      after = [
        "podman-network-paperless-ngx_default.service"
      ];
      requires = [
        "podman-network-paperless-ngx_default.service"
      ];
      partOf = [
        "podman-compose-paperless-ngx-root.target"
      ];
      wantedBy = [
        "podman-compose-paperless-ngx-root.target"
      ];
    };
    virtualisation.oci-containers.containers."paperless-ngx-webserver" = {
      image = "ghcr.io/paperless-ngx/paperless-ngx:latest";
      environmentFiles = [config.sops.templates."paperless.env".path];
      environment = {
        "PAPERLESS_DBENGINE" = "postgresql";
        "PAPERLESS_DBHOST" = "db";
        "PAPERLESS_OCR_LANGUAGE" = "eng";
        "PAPERLESS_REDIS" = "redis://broker:6379";
        "PAPERLESS_TIME_ZONE" = "Europe/London";
        "PAPERLESS_URL" = "https://paperless.voidarc.co.uk";
        "USERMAP_GID" = "0";
        "USERMAP_UID" = "0";
      };
      volumes = [
        "/containers/paperless-ngx/consume:/usr/src/paperless/consume:rw"
        "/containers/paperless-ngx/data:/usr/src/paperless/data:rw"
        "/containers/paperless-ngx/export:/usr/src/paperless/export:rw"
        "/containers/paperless-ngx/media:/usr/src/paperless/media:rw"
      ];
      ports = [
        "8000:8000/tcp"
      ];
      dependsOn = [
        "paperless-ngx-broker"
        "paperless-ngx-db"
      ];
      log-driver = "journald";
      extraOptions = [
        "--network-alias=webserver"
        "--network=paperless-ngx_default"
      ];
    };
    systemd.services."podman-paperless-ngx-webserver" = {
      serviceConfig = {
        Restart = pkgs.lib.mkOverride 90 "always";
      };
      after = [
        "podman-network-paperless-ngx_default.service"
      ];
      requires = [
        "podman-network-paperless-ngx_default.service"
      ];
      partOf = [
        "podman-compose-paperless-ngx-root.target"
      ];
      wantedBy = [
        "podman-compose-paperless-ngx-root.target"
      ];
    };

    # Networks
    systemd.services."podman-network-paperless-ngx_default" = {
      path = [pkgs.podman];
      serviceConfig = {
        Type = "oneshot";
        RemainAfterExit = true;
        ExecStop = "podman network rm -f paperless-ngx_default";
      };
      script = ''
        podman network inspect paperless-ngx_default || podman network create paperless-ngx_default
      '';
      partOf = ["podman-compose-paperless-ngx-root.target"];
      wantedBy = ["podman-compose-paperless-ngx-root.target"];
    };


    # Root service
    # When started, this will automatically create all resources and start
    # the containers. When stopped, this will teardown all resources.
    systemd.targets."podman-compose-paperless-ngx-root" = {
      unitConfig = {
        Description = "Root target generated by compose2nix.";
      };
      wantedBy = ["multi-user.target"];
    };
  });
}