Adding support for DBINDEX redis config value

.config/redis.config.php

@@ -18,4 +18,8 @@
   if (getenv('REDIS_HOST_USER') !== false) {
     $CONFIG['redis']['user'] = (string) getenv('REDIS_HOST_USER');
   }
+
+  if (getenv('REDIS_HOST_DB') !== false) {
+    $CONFIG['redis']['dbindex'] = (int) getenv('REDIS_HOST_DB');
+  }
 }

README.md

@@ -289,6 +289,7 @@ To use Redis for memory caching as well as PHP session storage, specify the foll
 - `REDIS_HOST_PORT` (default: `6379`) Optional port for Redis, only use for external Redis servers that run on non-standard ports.
 - `REDIS_HOST_USER` (not set by default) Optional username for Redis, only use for external Redis servers that require a user.
 - `REDIS_HOST_PASSWORD` (not set by default) Redis password
+- `REDIS_HOST_DB` (default: `0`) Index of the Redis database to use, set dbindex parameter in the redis config file for Nextcloud.
 
 Check the [Nextcloud documentation](https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/caching_configuration.html) for more information.
 

docker-entrypoint.sh

@@ -104,10 +104,10 @@ configure_redis_session() {
 
     case "$REDIS_HOST" in
         /*)
-            redis_save_path="unix://${REDIS_HOST}"
+            redis_save_path="unix://${REDIS_HOST}/${REDIS_HOST_DB:=0}"
             ;;
         *)
-            redis_save_path="tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}"
+            redis_save_path="tcp://${REDIS_HOST}:${REDIS_HOST_PORT:=6379}/${REDIS_HOST_DB:=0}"
             ;;
     esac