微服务服务网格架构

Architecture

服务网格架构图，展示 Istio 或 Linkerd 边车代理处理 mTLS 加密、流量策略、熔断器和跨微服务的分布式追踪。该模板可视化服务网格如何将网络关注点从应用代码中抽象出来，实现服务间的零信任通信。对于采用服务网格基础设施以提升可观测性和安全性的团队至关重要。

下载 .fz 文件

完整 FlowZap 代码

Ingress { # Ingress Controller
n1: circle label:"External Traffic"
n2: rectangle label:"TLS Termination"
n3: rectangle label:"Route to Service Mesh"
n1.handle(right) -> n2.handle(left)
n2.handle(right) -> n3.handle(left)
n3.handle(bottom) -> Mesh.n4.handle(top) [label="Enter Mesh"]
}
Mesh { # Service Mesh (Istio/Linkerd)
n4: rectangle label:"Sidecar Proxy Intercept"
n5: rectangle label:"mTLS Encryption"
n6: rectangle label:"Traffic Policy Check"
n7: diamond label:"Circuit Breaker Open?"
n8: rectangle label:"Load Balance Request"
n9: rectangle label:"Return Fallback"
n10: rectangle label:"Collect Telemetry"
n11: rectangle label:"Distributed Tracing"
n4.handle(right) -> n5.handle(left)
n5.handle(right) -> n6.handle(left)
n6.handle(right) -> n7.handle(left)
n7.handle(right) -> n8.handle(left) [label="Closed"]
n7.handle(bottom) -> n9.handle(top) [label="Open"]
n8.handle(bottom) -> Services.n12.handle(top) [label="Forward"]
n9.handle(bottom) -> Services.n18.handle(top) [label="Fallback"]
n10.handle(right) -> n11.handle(left)
}
Services { # Backend Services
n12: rectangle label:"Product Catalog Service"
n13: rectangle label:"Pricing Service"
n14: rectangle label:"Recommendation Engine"
n15: rectangle label:"Response Aggregation"
n16: rectangle label:"Sidecar Proxy Egress"
n17: circle label:"Response to Client"
n18: rectangle label:"Cached Fallback Response"
n12.handle(right) -> n13.handle(left) [label="Get Prices"]
n13.handle(right) -> n14.handle(left) [label="Enrich"]
n14.handle(right) -> n15.handle(left)
n15.handle(right) -> n16.handle(left)
n16.handle(right) -> n17.handle(left)
n18.handle(right) -> n16.handle(left) [label="Stale Data"]
n16.handle(top) -> Mesh.n10.handle(bottom) [label="Metrics"]
}

为什么需要这个工作流？

As microservices scale beyond a dozen services, managing mTLS certificates, traffic policies, retries, and observability at the application level becomes unsustainable. A service mesh moves these concerns into infrastructure-level sidecar proxies, giving platform teams centralized control over service-to-service communication without requiring application code changes.

工作原理

Step 1: External traffic enters through the ingress controller with TLS termination.
Step 2: The sidecar proxy intercepts all inbound and outbound traffic for the service.
Step 3: mTLS encryption is applied automatically between all services in the mesh.
Step 4: Traffic policies and circuit breaker rules are enforced at the proxy level.
Step 5: Requests are load-balanced across healthy service instances.
Step 6: Telemetry data (metrics, traces) is collected by the sidecar and exported to the observability stack.

替代方案

Implementing mTLS and circuit breaking in application code is error-prone and language-dependent. Managed service meshes like AWS App Mesh or GCP Traffic Director reduce operational overhead. This template helps teams understand the service mesh topology before adopting Istio or Linkerd.

Key Facts

Template Name	微服务服务网格架构
Category	Architecture
Steps	6 workflow steps
Format	FlowZap Code (.fz file)