Kubernetes StatefulSet 与 Headless Service 有状态部署实践

Headless Service：apiVersion: v1 kind: Service metadata: name: db namespace: default spec: clusterIP: None selector: app: db ports: - name: tcp port: 5432 targetPort: 5432 StatefulSet：apiVersion: apps/v1 kind: StatefulSet metadata: name: db spec: serviceName: db replicas: 3 selector: matchLabels: app: db template: metadata: labels: app: db spec: containers: - name: postgres image: postgres:16 ports: - containerPort: 5432 readinessProbe: tcpSocket: port: 5432 initialDelaySeconds: 5 periodSeconds: 10 livenessProbe: tcpSocket: port: 5432 initialDelaySeconds: 15 periodSeconds: 20 volumeMounts: - name: data mountPath: /var/lib/postgresql/data volumeClaimTemplates: - metadata: name: data spec: accessModes: ["ReadWriteOnce"] resources: requests: storage: 10Gi