为负载均衡类型的Service配置自定义EIP

通过CCE自动创建的带有EIP的ELB，可以通过添加Service的annotation（kubernetes.io/elb.custom-eip-id）完成ELB的EIP的自定义配置。

前提条件

已创建Kubernetes集群，且集群版本满足以下要求：
- v1.23集群：v1.23.18-r0及以上
- v1.25集群：v1.25.13-r0及以上
- v1.27集群：v1.27.10-r0及以上
- v1.28集群：v1.28.8-r0及以上
- v1.29集群：v1.29.4-r0及以上
- v1.30集群：v1.30.1-r0及以上
您需要使用kubectl连接到集群，详情请参见通过kubectl连接集群。

约束与限制

自定义EIP仅支持Service更新场景下配置，且Service的annotation中包含kubernetes.io/elb.eip-id。
自定义的EIP必须是未绑定状态。
配置自定义EIP后，如果ELB上的已有EIP是由CCE创建ELB时自动创建的且未被其他资源使用时，删除Service时会自动将EIP删除；如果ELB上的已有EIP是由您手动创建，删除Service时仅解绑EIP，您需要手动删除原先的EIP。

通过kubectl命令行创建

请参见通过kubectl连接集群，使用kubectl连接集群。

在创建Service时自动创建一个使用EIP的ELB，详情请参见通过kubectl命令行创建-自动创建ELB。

以使用独享型ELB的Service场景为例，查看该Service的YAML配置如下：

apiVersion: v1
kind: Service
metadata:
  annotations:
    kubernetes.io/elb.autocreate: '{"type":"public","bandwidth_name":"aaaaa","bandwidth_chargemode":"bandwidth","bandwidth_size":5,"bandwidth_sharetype":"PER","eip_type":"5_g-vm","name":"xxx","available_zone":["xxx"],"elb_virsubnet_ids":["fc0c61cd-c987-49c4-99a4-b7d816b57581"],"l7_flavor_name":"","l4_flavor_name":"L4_flavor.elb.pro.max","vip_subnet_cidr_id":"cf35b03f-c6ca-4f75-aa70-e2166cb1f800"}'
    kubernetes.io/elb.eip-id: 8560972c-2cc5-4699-94d6-e46f146eb73d     # 表示创建ELB时自动创建的EIP的ID
    kubernetes.io/elb.class: performance
    kubernetes.io/elb.id: 0e78a84a-7deb-4747-aeb6-09b6a820b001
  labels:
    app: test-svc
    version: v1
  name: test-eip
  namespace: default
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.247.93.235
  clusterIPs:
  - 10.247.93.235
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  loadBalancerIP: *.*.*.*
  ports:
  - name: cce-service-0
    nodePort: 31354
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: test-svc
    version: v1
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer:
    ingress:
    - ip: *.*.*.*
    - ip: 192.168.0.15

修改该Service配置，添加annotation（kubernetes.io/elb.custom-eip-id）。

apiVersion: v1
kind: Service
metadata:
  annotations:
    kubernetes.io/elb.autocreate: '{"type":"public","bandwidth_name":"aaaaa","bandwidth_chargemode":"bandwidth","bandwidth_size":5,"bandwidth_sharetype":"PER","eip_type":"5_g-vm","name":"xxx","available_zone":["xxx"],"elb_virsubnet_ids":["fc0c61cd-c987-49c4-99a4-b7d816b57581"],"l7_flavor_name":"","l4_flavor_name":"L4_flavor.elb.pro.max","vip_subnet_cidr_id":"cf35b03f-c6ca-4f75-aa70-e2166cb1f800"}'
    kubernetes.io/elb.eip-id: 8560972c-2cc5-4699-94d6-e46f146eb73d     # 表示创建ELB时自动创建的EIP的ID
    kubernetes.io/elb.custom-eip-id: 88c197a1-cb85-4b38-b672-1d60dc5d00db  # 自定义的EIP的ID    
    kubernetes.io/elb.class: performance
    kubernetes.io/elb.id: 0e78a84a-7deb-4747-aeb6-09b6a820b001
  labels:
    app: test-svc
    version: v1
  name: test-eip
  namespace: default
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.247.93.235
  clusterIPs:
  - 10.247.93.235
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  loadBalancerIP: *.*.*.*
  ports:
  - name: cce-service-0
    nodePort: 31354
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: test-svc
    version: v1
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer:
    ingress:
    - ip: *.*.*.*
    - ip: 192.168.0.15

表1 关键参数说明
参数	参数类型	描述
kubernetes.io/elb.custom-eip-id	String	自定义EIP的ID，您可以前往EIP控制台查看。该EIP必须是处于可绑定状态。

Service更新成功后，重新查看Service。

apiVersion: v1
kind: Service
metadata:
  annotations:
    kubernetes.io/elb.autocreate: '{"type":"public","bandwidth_name":"aaaaa","bandwidth_chargemode":"bandwidth","bandwidth_size":5,"bandwidth_sharetype":"PER","eip_type":"5_g-vm","name":"xxx","available_zone":["xxx"],"elb_virsubnet_ids":["fc0c61cd-c987-49c4-99a4-b7d816b57581"],"l7_flavor_name":"","l4_flavor_name":"L4_flavor.elb.pro.max","vip_subnet_cidr_id":"cf35b03f-c6ca-4f75-aa70-e2166cb1f800"}'
    kubernetes.io/elb.eip-id: 8560972c-2cc5-4699-94d6-e46f146eb73d     # 表示创建ELB时自动创建的EIP的ID
    kubernetes.io/elb.custom-eip-id: 88c197a1-cb85-4b38-b672-1d60dc5d00db  # 自定义的EIP的ID   
    kubernetes.io/elb.custom-eip-status: '{"id":"88c197a1-cb85-4b38-b672-1d60dc5d00db","public_ip_address":"2.2.2.2"}' # 自定义的EIP配置成功后，记录了配置的EIP的ID和IP地址
    kubernetes.io/elb.class: performance
    kubernetes.io/elb.id: 0e78a84a-7deb-4747-aeb6-09b6a820b001
  labels:
    app: test-svc
    version: v1
  name: test-eip
  namespace: default
spec:
  allocateLoadBalancerNodePorts: true
  clusterIP: 10.247.93.235
  clusterIPs:
  - 10.247.93.235
  externalTrafficPolicy: Cluster
  internalTrafficPolicy: Cluster
  ipFamilies:
  - IPv4
  ipFamilyPolicy: SingleStack
  loadBalancerIP: 2.2.2.2
  ports:
  - name: cce-service-0
    nodePort: 31354
    port: 80
    protocol: TCP
    targetPort: 80
  selector:
    app: test-svc
    version: v1
  sessionAffinity: None
  type: LoadBalancer
status:
  loadBalancer:
    ingress:
    - ip: 2.2.2.2
    - ip: 192.168.0.15

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