feat(haproxy): enable dynamic load balancing for SDK replicas using server-template

README.md

@@ -116,6 +116,12 @@ It is designed for **DFSPs (Digital Financial Service Providers)** who need a si
    - `--profile admin` (for portainer service for debugging purposes)
    - `--profile ttk` (for testing toolkit for testing purposes)
 
+Optional: Scale SDK replicas
+
+By default, the SDK runs as a single replica.
+For higher availability and load distribution, you can scale the SDK to multiple replicas.
+Example: Run with 3 SDK replicas:
+   - ` --scale sdk-scheme-adapter=3` (for testing toolkit for testing purposes)
 
 ## Accessing Services
 

docker/haproxy/haproxy.cfg

@@ -160,6 +160,8 @@ backend sdk_scheme_adapter_backend
     ## Without dynamic DNS resolution
     # server sdk_scheme_adapter1 sdk-scheme-adapter:4000 check
     ## To use dynamic DNS resolution with single replica
-    server sdk_scheme_adapter1 sdk-scheme-adapter:4000 resolvers docker resolve-prefer ipv4 check
+    ## server sdk_scheme_adapter1 sdk-scheme-adapter:4000 resolvers docker resolve-prefer ipv4 check
     ## To use dynamic DNS resolution with multiple replicas
     # server-template sdk 1-5 sdk-scheme-adapter:4000 resolvers docker resolve-prefer ipv4 check
+    # Multi-replica dynamic DNS resolution (works for 1 replica or 3+)
+    server-template sdk 1-5 sdk-scheme-adapter:4000 resolvers docker resolve-prefer ipv4 check init-addr none