Update extension-policy to match the new epp service name

Author: ahg-g

config/manifests/gateway/extension_policy.yaml

@@ -75,6 +75,39 @@ spec:
           initialDelaySeconds: 5
           periodSeconds: 10
 ---
+apiVersion: gateway.envoyproxy.io/v1alpha1
+kind: EnvoyExtensionPolicy
+metadata:
+  name: ext-proc-policy
+  namespace: default
+spec:
+  extProc:
+    - backendRefs:
+      - group: ""
+        kind: Service
+        name: vllm-llama2-7b-epp
+        port: 9002
+      processingMode:
+        allowModeOverride: true
+        request:
+          body: Buffered
+        response:
+      # The timeouts are likely not needed here. We can experiment with removing/tuning them slowly.
+      # The connection limits are more important and will cause the opaque: ext_proc_gRPC_error_14 error in Envoy GW if not configured correctly. 
+      messageTimeout: 1000s
+      backendSettings:
+        circuitBreaker:
+          maxConnections: 40000
+          maxPendingRequests: 40000
+          maxParallelRequests: 40000
+        timeout:
+          tcp:
+            connectTimeout: 24h
+  targetRef:
+    group: gateway.networking.k8s.io
+    kind: HTTPRoute
+    name: llm-route
+---
 kind: ClusterRole
 apiVersion: rbac.authorization.k8s.io/v1
 metadata: