[DX-2090] Add a clear statement that redis is an essential prerequisite to the operation of tyk products #6897

tyk-docs/content/apim/open-source/installation.md

@@ -21,6 +21,10 @@ aliases:
 ---
 
 
+## Important Prerequisites
+
+**Redis is required for ALL Tyk installations**. Before proceeding with any installation method, ensure you have a Redis instance available that meets our [Redis requirements and recommendations]({{< ref "planning-for-production/redis-requirements" >}}). Redis is the primary dependency that enables Tyk to function and must be installed and running before you begin.
+
 ## Introduction
 
 The backbone of all our products is our open source Gateway. You can install our Open Source / Community Edition on the following platforms:

tyk-docs/content/tyk-configuration-reference/redis-cluster-sentinel.md

@@ -330,4 +330,4 @@ From **Tyk 5.3**, additional options are available for more granular control:
   "optimisation_max_idle": 2000,
   "optimisation_max_active": 4000
 }
-```
+```

tyk-docs/content/tyk-self-managed/install.md

@@ -68,6 +68,13 @@ aliases:
   - /tyk-on-premises/on-ubuntu
   - /tyk-on-premises/redhat-rhel-centos
 ---
+
+{{< note success >}}
+**Important Prerequisites**
+
+Redis is an essential requirement for all Tyk products. Before proceeding with any installation, please ensure you have a Redis instance available that meets our [Redis requirements and recommendations]({{< ref "planning-for-production/redis-requirements" >}}). Tyk will not function without Redis.
+{{< /note >}}
+
 ## Introduction
 
 {{< grid >}}

tyk-docs/content/tyk-stack.md

@@ -9,6 +9,10 @@ aliases:
 
 {{< include "oss-product-list-include" >}}
 
+## Prerequisites
+
+Redis is an essential prerequisite for all Tyk products. For detailed Redis requirements and configuration guidance, see our [Redis requirements documentation]({{< ref "planning-for-production/redis-requirements" >}}).
+
 ## Closed Source
 
 The following Tyk components, created and maintained by the Tyk Team, are proprietary and closed-source: