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multiple-ports-and-loadbalancers-in-backendgroup.md

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Background

There has been some complaint about the inconvenience of BackendGroup, including:

  • When someone wants to register multiple Pod ports to load balancers, multiple BackendGroup must be created because there is only one port can be specified in the BackendGroup
  • It's not uncommon to register given Pods to multiple load balancers, in such scenario, multiple pairs of LoadBalancer and BackendGroup must be created

Solution

  1. Substitute loadBalancers for lbName in BackendGroup.spec, backends (Pods/Service NodePort/Static) will be registered to every load balancer in BackendGroup.spec.loadBalancers
  2. For BackendGroup of type pods, users may specify multiple ports in BackendGroup.spec.ports

other changes

portNumber is deprecated, use port instead.

updated BackendGroup

apiVersion: tke.cloud.tencent.com/v1beta1
kind: BackendGroup
metadata: 
  name: my-bg
spec: 
  loadBalancers:
    - my-load-balancer-1 
    - my-load-balancer-2
  pods:
    ports:
      - port: 80
        protocol: TCP
      - port: 90
        protocol: UDP
    byLabel:
      app: my-web-server