Kubernetes StatefulSet 与 Headless Service 有状态部署实践

--- title: Kubernetes StatefulSet 与 Headless Service 有状态部署实践 keywords: StatefulSet, Headless Service, volumeClaimTemplates, readinessProbe, clusterIP None description: 使用 StatefulSet 配合 Headless Service 部署有状态应用，持久卷模板与就绪/存活探针确保稳定运行。 tags: - Headless Service - Kubernetes - StatefulSet - clusterIP None - readinessProbe - volumeClaimTemplates - 云原生 - 有状态 categories: - 文章资讯 - 技术教程 --- 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 ```