为负载均衡类型的Service指定多个端口配置健康检查

约束与限制

• 该特性从以下版本开始支持：
  • v1.19集群：v1.19.16-r5及以上版本
  • v1.21集群：v1.21.8-r0及以上版本
  • v1.23集群：v1.23.6-r0及以上版本
  • v1.25集群：v1.25.2-r0及以上版本
  • v1.25以上版本集群
• 不允许同时配置 "kubernetes.io/elb.health-check-option" 和 "kubernetes.io/elb.health-check-options"。
• target_service_port字段必须配置，且不能重复。
• TCP端口只能配置健康检查协议为TCP、HTTP，UDP端口必须配置健康检查协议为UDP。

操作步骤

为不同service端口配置健康检查，使用"kubernetes.io/elb.health-check-options"注解的示例如下：

apiVersion: v1
kind: Service
metadata:
  name: nginx
  namespace: default
  labels: 
    app: nginx
    version: v1
  annotations:
    kubernetes.io/elb.class: union         # 负载均衡类型
    kubernetes.io/elb.id: <your_elb_id>    # ELB ID，替换为实际值
    kubernetes.io/elb.lb-algorithm: ROUND_ROBIN  # 负载均衡器算法
    kubernetes.io/elb.health-check-flag: 'on'    # 开启ELB健康检查功能
    kubernetes.io/elb.health-check-options: '[
	{
		"protocol": "TCP",
		"delay": "5",
		"timeout": "10",
		"max_retries": "3",
		"target_service_port": "TCP:1",
		"monitor_port": "22"
	},
	{
		"protocol": "HTTP",
		"delay": "5",
		"timeout": "10",
		"max_retries": "3",
		"path": "/",
		"target_service_port": "TCP:2",
		"monitor_port": "22",
                "expected_codes": "200-399"
	}
    ]'
spec:
  selector:
    app: nginx
    version: v1
  externalTrafficPolicy: Cluster
  ports:
    - name: cce-service-0
      targetPort: 1
      nodePort: 0
      port: 1
      protocol: TCP
    - name: cce-service-1
      targetPort: 2
      nodePort: 0
      port: 2
      protocol: TCP
  type: LoadBalancer
  loadBalancerIP: **.**.**.**