StatefulSet的每个Pod单独创建Service实践

my-db-0.my-db.default.svc.cluster.local
my-db-1.my-db.default.svc.cluster.local
...

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: my-db
spec:
  serviceName: "my-db"
  replicas: 3
  selector:
    matchLabels:
      app: my-db
  template:
    metadata:
      labels:
        app: my-db
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

apiVersion: v1
kind: Service
metadata:
  name: my-db
spec:
  clusterIP: None
  selector:
    app: my-db
  ports:
  - port: 80
    targetPort: 80

# Service for my-db-0
apiVersion: v1
kind: Service
metadata:
  name: my-db-0-svc
spec:
  selector:
    statefulset.kubernetes.io/pod-name: my-db-0
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30001   # 可选指定，范围 30000–32767
  type: NodePort
---
# Service for my-db-1
apiVersion: v1
kind: Service
metadata:
  name: my-db-1-svc
spec:
  selector:
    statefulset.kubernetes.io/pod-name: my-db-1
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30002
  type: NodePort
---
# Service for my-db-2
apiVersion: v1
kind: Service
metadata:
  name: my-db-2-svc
spec:
  selector:
    statefulset.kubernetes.io/pod-name: my-db-2
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 30003
  type: NodePort

for i in 0 1 2; do
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Service
metadata:
  name: my-db-${i}-svc
spec:
  selector:
    statefulset.kubernetes.io/pod-name: my-db-${i}
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
      nodePort: 3000$((i+1))
  type: NodePort
EOF
done