k8s的tomcat多pod session会话保持配置

问题：k8s启动的tomcat服务，每次访问都带了session会话，每次调整不同的pod导致session实效，系统登录失败。

处理：在server中添加session保持

sessionAffinity: ClientIP

实验：

启动服务：

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[root@master test]# more Deploy.yaml apiVersion: extensions/v1beta1 kind: Deployment metadata:   name: spring-k8s spec:   replicas: 4   selector:     matchLabels:       app: spring-k8s   template:     metadata:       labels:         app: spring-k8s     spec:       containers:         - name: spring-k8s           image: jiangbo920827/spring-k8s:liveness           ports:             - containerPort: 8080 [root@master test]# more Service.yaml apiVersion: v1 kind: Service metadata:   name: spring-k8s spec:   selector:     app: spring-k8s   type: NodePort   ports:     - nodePort: 30008       port: 80       protocol: TCP       targetPort: 8080

容器启动：

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[root@master ~]# kubectl get pods |grep sprin spring-k8s-7db85b44fc-4d9xg   1/1       Running   0          1h spring-k8s-7db85b44fc-4rjp4   1/1       Running   0          1h spring-k8s-7db85b44fc-64v76   1/1       Running   0          1h spring-k8s-7db85b44fc-s5hhw   1/1       Running   0          1h

没加session亲和信参数：分布到各个pod

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[root@master test]# for i in {1..10};do curl http://192.168.10.98:30008/hostname;echo ;done spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4rjp4 spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-64v76 spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-s5hhw spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-64v76 spring-k8s-7db85b44fc-s5hhw

添加session亲和性参数：sessionAffinity: ClientIP

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[root@master test]# more Service.yaml apiVersion: v1 kind: Service metadata:   name: spring-k8s spec:   selector:     app: spring-k8s   type: NodePort   ports:     - nodePort: 30008       port: 80       protocol: TCP       targetPort: 8080   sessionAffinity: ClientIP [root@master test]# for i in {1..10};do curl http://192.168.10.98:30008/hostname;echo ;done spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg spring-k8s-7db85b44fc-4d9xg