From a0005c8b3e5275b119017700ef5de208bcb819cd Mon Sep 17 00:00:00 2001
From: amo13 <amaury@mailbox.org>
Date: Wed, 16 Aug 2023 02:05:01 +0200
Subject: [PATCH] Enhancement: Allow to set a prefix for keys and channels in
 redis  (#3993)

---
 docs/configuration.md     | 6 ++++++
 src/paperless/settings.py | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/docs/configuration.md b/docs/configuration.md
index 0ed2218a6..c38221e50 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -35,6 +35,12 @@ matcher.
 
     Defaults to `redis://localhost:6379`.
 
+`PAPERLESS_REDIS_PREFIX=<prefix>`
+
+: Prefix to be used in Redis for keys and channels. Useful for sharing one Redis server among multiple Paperless instances.
+
+    Defaults to no prefix.
+
 ### Database
 
 `PAPERLESS_DBENGINE=<engine_name>`
diff --git a/src/paperless/settings.py b/src/paperless/settings.py
index b33d7fb7d..7d2dda0d9 100644
--- a/src/paperless/settings.py
+++ b/src/paperless/settings.py
@@ -364,6 +364,7 @@ CHANNEL_LAYERS = {
             "hosts": [_CHANNELS_REDIS_URL],
             "capacity": 2000,  # default 100
             "expiry": 15,  # default 60
+            "prefix": os.getenv("PAPERLESS_REDIS_PREFIX", ""),
         },
     },
 }
@@ -679,6 +680,9 @@ CELERY_TASK_SEND_SENT_EVENT = True
 CELERY_SEND_TASK_SENT_EVENT = True
 CELERY_BROKER_CONNECTION_RETRY = True
 CELERY_BROKER_CONNECTION_RETRY_ON_STARTUP = True
+CELERY_BROKER_TRANSPORT_OPTIONS = {
+    "global_keyprefix": os.getenv("PAPERLESS_REDIS_PREFIX", ""),
+}
 
 CELERY_TASK_TRACK_STARTED = True
 CELERY_TASK_TIME_LIMIT: Final[int] = __get_int("PAPERLESS_WORKER_TIMEOUT", 1800)