Service Mesh Envoy

原文链接

Service Mesh is the communication layer in your microservice setup. 请求代理layer

When you talk about “Service Mesh”, you will definitely hear the term “Sidecar”, a “Sidecar” is a proxy which is available for each instance of your service, each “Sidecar” takes care of one instance of one service.

以sidecar的方式来实现sevice mesh？统一的proxy做不到的话，由sidecar来实现？

What does a Service Mesh provide?

1. Service Discovery
2. Observability (metrics)
3. Rate Limiting
4. Circuit Breaking
5. Traffic Shifting
6. Load Balancing
7. Authentication and Authorisation
8. Distributed Tracing

在pod和service部分进行改变

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: servicea
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: servicea
    spec:
      containers:
      - name: servicea
        image: dnivra26/servicea:0.6
        ports:
        - containerPort: 8081
          name: svc-port
          protocol: TCP
      - name: envoy
        image: envoyproxy/envoy:latest
        ports:
          - containerPort: 9901
            protocol: TCP
            name: envoy-admin
          - containerPort: 8786
            protocol: TCP
            name: envoy-web
        volumeMounts:
          - name: envoy-config-volume
            mountPath: /etc/envoy-config/
        command: ["/usr/local/bin/envoy"]
        args: ["-c", "/etc/envoy-config/config.yaml", "--v2-config-only", "-l", "info","--service-cluster","servicea","--service-node","servicea", "--log-format", "[METADATA][%Y-%m-%d %T.%e][%t][%l][%n] %v"]
      volumes:
        - name: envoy-config-volume
          configMap:
            name: sidecar-config
            items:
              - key: envoy-config
                path: config.yaml