[BUG] DOCKER_MODS aren't working

[fertkir]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I've created a docker mod, added it to the prowlarr's docker-compose.yml like this:

services:
  prowlarr:
    image: lscr.io/linuxserver/prowlarr:latest
    environment:
      - PUID=1000
      - PGID=1000
      - DOCKER_MODS=ghcr.io/fertkir/docker-mod-prowlarr:master
      - AUTHENTICATION_METHOD=External
    volumes:
      - prowlarr-config:/config
volumes:
  prowlarr-config:

The config wasn't patched by the mod. Moreover, I don't even see logs like:

[mod-init] Running Docker Modification Logic

I have another docker mod which works with transmission like a charm. As an experiment, I tried adding this working mod to prowlarr, but I still don't see logs saying that the mod is being applied.

Expected Behavior

No response

Steps To Reproduce

1. Create a docker-compose.yml:

services:
  prowlarr:
    image: lscr.io/linuxserver/prowlarr:latest
    environment:
      - PUID=1000
      - PGID=1000
      - DOCKER_MODS=ghcr.io/fertkir/docker-mod-prowlarr:master
      - AUTHENTICATION_METHOD=External
    volumes:
      - prowlarr-config:/config
volumes:
  prowlarr-config:

2. Run

docker compose up

Environment

- OS: Ubuntu 24.04
- How docker service was installed:

sudo apt install docker.io docker-compose-v2

CPU architecture

x86-64

Docker creation

services:
  prowlarr:
    image: lscr.io/linuxserver/prowlarr:latest
    environment:
      - PUID=1000
      - PGID=1000
      - DOCKER_MODS=ghcr.io/fertkir/docker-mod-prowlarr:master
      - AUTHENTICATION_METHOD=External
    volumes:
      - prowlarr-config:/config
volumes:
  prowlarr-config:

Container logs

[Info] FluentMigrator.Runner.MigrationRunner: 34: history_fix_data_titles migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0021831s 
[Info] FluentMigrator.Runner.MigrationRunner: 35: download_client_per_indexer migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] download_client_per_indexer: Starting migration of Log DB to 35 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (35, '2025-11-02T07:20:24', 'download_client_per_indexer') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 35: download_client_per_indexer migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0020137s 
[Info] FluentMigrator.Runner.MigrationRunner: 36: postgres_update_timestamp_columns_to_with_timezone migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] postgres_update_timestamp_columns_to_with_timezone: Starting migration of Log DB to 36 
[Info] FluentMigrator.Runner.MigrationRunner: AlterTable Logs 
[Info] FluentMigrator.Runner.MigrationRunner: => 9E-07s 
[Info] FluentMigrator.Runner.MigrationRunner: AlterColumn Logs Time DateTimeOffset 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE TABLE "Logs_temp" ("Id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "Message" TEXT NOT NULL, "Time" DATETIME NOT NULL, "Logger" TEXT NOT NULL, "Exception" TEXT, "ExceptionType" TEXT, "Level" TEXT NOT NULL) 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "Logs_temp" ("Id", "Message", "Time", "Logger", "Exception", "ExceptionType", "Level") SELECT "Id", "Message", "Time", "Logger", "Exception", "ExceptionType", "Level" FROM "Logs" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: DROP TABLE "Logs" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: ALTER TABLE "Logs_temp" RENAME TO "Logs" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE INDEX "IX_Logs_Time" ON "Logs" ("Time" ASC) 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0028831s 
[Info] FluentMigrator.Runner.MigrationRunner: AlterTable UpdateHistory 
[Info] FluentMigrator.Runner.MigrationRunner: => 1.1E-06s 
[Info] FluentMigrator.Runner.MigrationRunner: AlterColumn UpdateHistory Date DateTimeOffset 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE TABLE "UpdateHistory_temp" ("Id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "Date" DATETIME NOT NULL, "Version" TEXT NOT NULL, "EventType" INTEGER NOT NULL) 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "UpdateHistory_temp" ("Id", "Date", "Version", "EventType") SELECT "Id", "Date", "Version", "EventType" FROM "UpdateHistory" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: DROP TABLE "UpdateHistory" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: ALTER TABLE "UpdateHistory_temp" RENAME TO "UpdateHistory" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE INDEX "IX_UpdateHistory_Date" ON "UpdateHistory" ("Date" ASC) 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0092007s 
[Info] FluentMigrator.Runner.MigrationRunner: AlterTable VersionInfo 
[Info] FluentMigrator.Runner.MigrationRunner: => 1.2E-06s 
[Info] FluentMigrator.Runner.MigrationRunner: AlterColumn VersionInfo AppliedOn DateTimeOffset 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE TABLE "VersionInfo_temp" ("Version" INTEGER NOT NULL, "AppliedOn" DATETIME, "Description" TEXT) 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo_temp" ("Version", "AppliedOn", "Description") SELECT "Version", "AppliedOn", "Description" FROM "VersionInfo" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: DROP TABLE "VersionInfo" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: ALTER TABLE "VersionInfo_temp" RENAME TO "VersionInfo" 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: CREATE UNIQUE INDEX "UC_Version" ON "VersionInfo" ("Version" ASC) 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0024968s 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (36, '2025-11-02T07:20:24', 'postgres_update_timestamp_columns_to_with_timezone') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 36: postgres_update_timestamp_columns_to_with_timezone migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0041869s 
[Info] FluentMigrator.Runner.MigrationRunner: 37: add_notification_status migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] add_notification_status: Starting migration of Log DB to 37 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (37, '2025-11-02T07:20:24', 'add_notification_status') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 37: add_notification_status migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0019065s 
[Info] FluentMigrator.Runner.MigrationRunner: 38: indexers_freeleech_only_config_contract migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] indexers_freeleech_only_config_contract: Starting migration of Log DB to 38 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (38, '2025-11-02T07:20:24', 'indexers_freeleech_only_config_contract') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 38: indexers_freeleech_only_config_contract migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0022431s 
[Info] FluentMigrator.Runner.MigrationRunner: 39: email_encryption migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] email_encryption: Starting migration of Log DB to 39 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (39, '2025-11-02T07:20:24', 'email_encryption') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 39: email_encryption migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0018302s 
[Info] FluentMigrator.Runner.MigrationRunner: 40: newznab_category_to_capabilities_settings migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] newznab_category_to_capabilities_settings: Starting migration of Log DB to 40 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (40, '2025-11-02T07:20:24', 'newznab_category_to_capabilities_settings') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 40: newznab_category_to_capabilities_settings migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0017501s 
[Info] FluentMigrator.Runner.MigrationRunner: 41: gazelle_freeleech_token_options migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] gazelle_freeleech_token_options: Starting migration of Log DB to 41 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (41, '2025-11-02T07:20:24', 'gazelle_freeleech_token_options') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 41: gazelle_freeleech_token_options migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0023641s 
[Info] FluentMigrator.Runner.MigrationRunner: 42: myanonamouse_freeleech_wedge_options migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] myanonamouse_freeleech_wedge_options: Starting migration of Log DB to 42 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (42, '2025-11-02T07:20:24', 'myanonamouse_freeleech_wedge_options') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 42: myanonamouse_freeleech_wedge_options migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0018085s 
[Info] FluentMigrator.Runner.MigrationRunner: 43: newznab_indexers_enable_redirect migrating 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Beginning Transaction 
[Info] newznab_indexers_enable_redirect: Starting migration of Log DB to 43 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: INSERT INTO "VersionInfo" ("Version", "AppliedOn", "Description") VALUES (43, '2025-11-02T07:20:24', 'newznab_indexers_enable_redirect') 
[Info] NzbDrone.Core.Datastore.Migration.Framework.NzbDroneSQLiteProcessor: Committing Transaction 
[Info] FluentMigrator.Runner.MigrationRunner: 43: newznab_indexers_enable_redirect migrated 
[Info] FluentMigrator.Runner.MigrationRunner: => 0.0017409s 
[Info] Microsoft.Hosting.Lifetime: Now listening on: http://[::]:9696 
[Info] UpdaterConfigProvider: Update mechanism BuiltIn not supported in the current configuration, changing to Docker. 
[Info] AppSyncProfileService: Setting up default app profile 
[Info] CommandExecutor: Starting 3 threads for tasks. 
[Info] ManagedHttpDispatcher: IPv4 is available: True, IPv6 will be disabled 
[Info] Microsoft.Hosting.Lifetime: Application started. Press Ctrl+C to shut down. 
[Info] Microsoft.Hosting.Lifetime: Hosting environment: Production 
[Info] Microsoft.Hosting.Lifetime: Content root path: /app/prowlarr/bin

[github-actions]

Thanks for opening your first issue here! Be sure to follow the relevant issue templates, or risk having this issue marked as invalid.

[Roxedus]

Without full logs, we can't tell what's going on.

This doesn't need to be a mod, prowlarr support this ootb

[fertkir]

Indeed, PROWLARR__AUTH__METHOD=External is what I needed. Thanks!