Allow customization of Redis env vars for advanced configurations.

CHANGELOG.md

@@ -34,7 +34,6 @@ release channel, you can take advantage of these new features and fixes.
   "unprocessable" if their modified time updates (i.e. the file is reuploaded) or approximately a week passes.
 
 - In preparation for the PHP 8.0 update and for other technical reasons, we have made some library changes:
-
     - Switched PSR-6/PSR-16 cache implementation to the `symfony/cache` component.
     - Removed the `studio24/rotate` and replaced with custom implementation for Flysystem.
     - Switched from custom paginator to the `pagerfanta` library.
@@ -46,6 +45,12 @@ release channel, you can take advantage of these new features and fixes.
 
 - The Docker Utility Script (`./docker.sh`) will now ask before running `docker system prune` post-update.
 
+- For more advanced setups, you can now set the following environment variables in `azuracast.env` to use a third-party
+  Redis service instead of the one bundled with AzuraCast:
+    - `REDIS_HOST` (default: `redis` for Docker, `localhost` for Ansible)
+    - `REDIS_PORT` (default: 6379)
+    - `REDIS_DB` for the database index (default: 1)
+
 ## Bug Fixes
 
 - Hidden mount points and relays will still be shown on the profile page.

azuracast.sample.env

@@ -90,6 +90,25 @@ MYSQL_SLOW_QUERY_LOG=0
 # Default: 100
 MYSQL_MAX_CONNECTIONS=100
 
+#
+# Redis Configuration
+#
+# Uncomment these fields if you are using a third-party Redis host instead of the one provided with AzuraCast.
+# Do not modify these fields if you are using the standard AzuraCast Redis host.
+#
+
+# Name of the Redis host.
+# Default: redis
+# REDIS_HOST=redis
+
+# Port to connect to on the Redis host.
+# Default: 6379
+# REDIS_PORT=6379
+
+# Database index to use on the Redis host.
+# Default: 1
+# REDIS_DB=1
+
 #
 # Advanced Configuration
 #

config/services.php

@@ -146,11 +146,13 @@ return [
 
     // Redis cache
     Redis::class => function (Environment $environment) {
-        $redis_host = $environment->isDocker() ? 'redis' : 'localhost';
+        $redisHost = $_ENV['REDIS_HOST'] ?? ($environment->isDocker() ? 'redis' : 'localhost');
+        $redisPort = (int)($_ENV['REDIS_PORT'] ?? 6379);
+        $redisDb = (int)($_ENV['REDIS_DB'] ?? 1);
 
         $redis = new Redis();
-        $redis->connect($redis_host, 6379, 15);
-        $redis->select(1);
+        $redis->connect($redisHost, $redisPort, 15);
+        $redis->select($redisDb);
 
         return $redis;
     },