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process.md

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+openfeign依据consul中的服务找到对应的pod的ip：port。蓝绿怎么做？
+
+```mermaid
+flowchart TD
+    subgraph Client Side
+        A[Spring Boot App with OpenFeign] -->|Call my-service| B[Spring Cloud LoadBalancer]
+    end
+
+    subgraph Consul
+        B -->|Query my-service instances| C[Consul Service Discovery]
+        C -->|Return instances with tags/meta| D[Instance List with version info]
+    end
+
+    subgraph K8s Cluster
+        D -->|Filter version=blue/green| E[Service Selector / LoadBalancer]
+        
+        subgraph Blue Deployment
+            E --> F[Pod Blue 1]
+            E --> G[Pod Blue 2]
+        end
+
+        subgraph Green Deployment
+            E --> H[Pod Green 1]
+            E --> I[Pod Green 2]
+        end
+    end
+
+    %% Optional: Gateway / Ingress for traffic control
+    subgraph Gateway/Ingress Layer
+        J[Ingress / Service Mesh] -.-> E
+        J -->|Route 90% blue, 10% green| F
+        J -->|Route 90% blue, 10% green| H
+    end
+```
+