taaefik,kubernetes session affinity、session会话保持

Posted 2023-04-30

参考技术A kubernetes 上可以多实例（pod）高负载运行，但是如果应用如果没有做session 同步的话，就会导致 session 不一致。
kubernetes 有session 亲和性的功能（每个client每次访问，都会匹配到对应session的后端）

例子：

配置service 和 ingress
apiVersion: v1
kind: Service
metadata:
annotations:
traefik.backend.loadbalancer.sticky: "true"
spec:
sessionAffinity: ClientIP
sessionAffinityConfig:
clientIP:
timeoutSeconds: 10800

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
traefik.frontend.rule.type: PathPrefixStrip
traefik.ingress.kubernetes.io/affinity: "true"
traefik.ingress.kubernetes.io/load-balancer-method: drr
traefik.ingress.kubernetes.io/session-cookie-name: ttt

servlet使用sessio和spring mvc中的controller使用session

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

 

request.setCharacterEncoding("UTF-8");
response.setHeader("Content-type","text/html;charset=UTF-8");

HttpSession session = request.getSession(true);

session.setAttribute("rno",list.get(0));

}

 

 

protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {

request.setCharacterEncoding("UTF-8");
response.setHeader("Content-type","text/html;charset=UTF-8");

HttpSession session = request.getSession(true);

String name = student.getSTUNAME();

session.setAttribute("name",name);

 

}