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