微服务边车模式架构

Architecture

边车模式架构图，展示 Envoy 代理、日志收集器和配置监视器边车与 Kubernetes Pod 中的应用容器一起运行，控制平面管理配置。该模板演示了日志记录、监控和配置等辅助关注点如何作为共置容器部署。对于采用云原生容器编排模式的团队至关重要。

下载 .fz 文件

完整 FlowZap 代码

Pod { # Kubernetes Pod
n1: circle label:"Incoming Request"
n2: rectangle label:"Envoy Sidecar Proxy"
n3: rectangle label:"Application Container"
n4: rectangle label:"Log Collector Sidecar"
n5: rectangle label:"Config Watcher Sidecar"
n6: circle label:"Outgoing Response"
n1.handle(right) -> n2.handle(left)
n2.handle(right) -> n3.handle(left) [label="Decrypted"]
n3.handle(bottom) -> n4.handle(top) [label="Logs"]
n5.handle(right) -> n3.handle(left) [label="Config Update"]
n3.handle(right) -> n6.handle(left)
n2.handle(bottom) -> Observability.n10.handle(top) [label="Metrics"]
}
ControlPlane { # Control Plane
n7: rectangle label:"Service Mesh Control Plane"
n8: rectangle label:"Push Configuration"
n9: rectangle label:"Certificate Authority"
n7.handle(right) -> n8.handle(left) [label="Policy"]
n8.handle(bottom) -> Pod.n2.handle(top) [label="xDS Config"]
n9.handle(bottom) -> Pod.n2.handle(top) [label="mTLS Cert"]
n8.handle(right) -> Pod.n5.handle(top) [label="App Config"]
}
Observability { # Observability Stack
n10: rectangle label:"Prometheus Metrics"
n11: rectangle label:"Jaeger Tracing"
n12: rectangle label:"ELK Log Aggregation"
n13: rectangle label:"Grafana Dashboard"
n10.handle(right) -> n13.handle(left) [label="Metrics"]
n11.handle(right) -> n13.handle(left) [label="Traces"]
n12.handle(right) -> n13.handle(left) [label="Logs"]
n10.handle(top) -> Pod.n4.handle(bottom) [label="Scrape"]
}

为什么需要这个工作流？

Cross-cutting concerns like logging, monitoring, and configuration management clutter application code and vary across programming languages. The sidecar pattern deploys these concerns as separate containers co-located with the application, providing language-agnostic infrastructure capabilities without modifying business logic.

工作原理

Step 1: The application container and sidecar containers are deployed together in a Kubernetes pod.
Step 2: The Envoy sidecar proxy intercepts all network traffic for mTLS and load balancing.
Step 3: The log collector sidecar ships application logs to the centralized logging system.
Step 4: The config watcher sidecar monitors configuration changes and updates the application.
Step 5: The control plane pushes policy updates and certificates to sidecar proxies.
Step 6: The observability stack collects metrics, traces, and logs from all sidecars.

替代方案

Embedding these concerns in application libraries creates language-specific maintenance burden. DaemonSets handle node-level concerns but not pod-level isolation. This template shows the pod-level sidecar approach used by service meshes.

Key Facts

Template Name	微服务边车模式架构
Category	Architecture
Steps	6 workflow steps
Format	FlowZap Code (.fz file)