关于共享ip

(py3env) [root@deployer metalLB]# cat test-external-lb-svc-share-ip-01.yml
kind: Service
apiVersion: v1
metadata:
  name: srvclb-ngnx1
  annotations: 
    metallb.universe.tf/allow-shared-ip: "test-share-ip"  # 注意这里要采用同一个键
spec:
  selector:
    app: hello1
    tier: frontend
  ports:
  - protocol: "TCP"
    port: 8080
    targetPort: 8080
  type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: loadbalancer1
spec:
  replicas: 2
  selector:
    matchLabels:
      app: hello1
  template:
    metadata:
      labels:
        app: hello1
        tier: frontend
    spec:
      containers:
      - name: nginx
        image: "nginxdemos/hello"




(py3env) [root@deployer metalLB]# cat test-external-lb-svc-share-ip-02.yml
kind: Service
apiVersion: v1
metadata:
  name: srvclb-ngnx2
  annotations: 
    metallb.universe.tf/allow-shared-ip: "test-share-ip"   # 注意这里要采用同一个键
spec:
  selector:
    app: hello2
    tier: frontend
  ports:
  - protocol: "TCP"
    port: 8081
    targetPort: 8081
  type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: loadbalancer2
spec:
  replicas: 2
  selector:
    matchLabels:
      app: hello2
  template:
    metadata:
      labels:
        app: hello2
        tier: frontend
    spec:
      containers:
      - name: nginx
        image: "nginxdemos/hello"

参考:

共享ip 官网参考: https://metallb.universe.tf/usage/#ip-address-sharing

指定ip 参考模板： https://github.com/metallb/metallb/issues/271

指定ip 可能没有 共享键更灵活，但是可以指定固定ip。

扩展： metalLB需要支持的功能

1.支持vpc 内部 aap（对应fip）

2.支持多网卡响应arp，而非仅k8s node 管理的网卡