会话亲和性

会话亲和性（Session Affinity，也称为 Sticky Session）是一种将同一用户的请求路由到同一 Pod 的技术。

目录

1. 会话亲和性概述
2. 基于一致性哈希
3. 基于 Cookie
4. 基于 Header
5. 实践示例

会话亲和性概述

基于一致性哈希

基于 HTTP Header

apiVersion: networking.istio.io/v1
kind: DestinationRule
metadata:
  name: reviews-session-affinity
spec:
  host: reviews
  trafficPolicy:
    loadBalancer:
      consistentHash:
        httpHeaderName: "x-user-id"

基于 Cookie

apiVersion: networking.istio.io/v1
kind: DestinationRule
metadata:
  name: reviews-cookie-affinity
spec:
  host: reviews
  trafficPolicy:
    loadBalancer:
      consistentHash:
        httpCookie:
          name: "session-id"
          ttl: 0s  # Cookie expiration time (0s = session cookie)

基于源 IP

apiVersion: networking.istio.io/v1
kind: DestinationRule
metadata:
  name: reviews-ip-affinity
spec:
  host: reviews
  trafficPolicy:
    loadBalancer:
      consistentHash:
        useSourceIp: true

参考资料

• Istio 会话亲和性