merge extenstion and patch policy in one manifests

Author: ahg-g

Diff for: config/manifests/gateway/extension_policy.yaml

@@ -85,4 +85,36 @@ spec:
     #     op: replace
     #     path: "/default_filter_chain/filters/0/typed_config/http_filters/0/typed_config/processing_mode/response_header_mode"
     #     value: SEND
-
+---
+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

Diff for: config/manifests/gateway/patch_policy.yaml

@@ -88,7 +88,6 @@ This quickstart guide is intended for engineers familiar with k8s and model serv
 ### Deploy Envoy Gateway Custom Policies
 
    ```bash
-   kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/gateway/extension_policy.yaml
    kubectl apply -f https://github.com/kubernetes-sigs/gateway-api-inference-extension/raw/main/config/manifests/gateway/patch_policy.yaml
    ```
    > **_NOTE:_** This is also per InferencePool, and will need to be configured to support the new pool should you wish to experiment further.