以下配置需要加到service中，而不是ingress中

  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/affinity: "true"
    traefik.ingress.kubernetes.io/load-balancer-method: drr 
    traefik.ingress.kubernetes.io/buffering: |-
      maxrequestbodybytes: 10485760
      memrequestbodybytes: 2097153
      maxresponsebodybytes: 10485761
      memresponsebodybytes: 2097152
      retryexpression: IsNetworkError() && Attempts() <= 2