# 为负载均衡类型的Service修改自定义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](https://support.huaweicloud.com/usermanual-cce/cce_10_0107.html)。
 
#### 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
1. 请参见[通过kubectl连接集群](https://support.huaweicloud.com/usermanual-cce/cce_10_0107.html)，使用kubectl连接集群。
2. 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](https://support.huaweicloud.com/usermanual-cce/cce_10_0681.html#cce_10_0681__section6422152185311)。
   
   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，不可修改
       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
   ```
   
   
3. 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，不可修改
       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。 |
      
   
   
4. 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，不可修改
       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
   ```