[英]Kubernetes StatefulSet - does not resatore data on pod restart
Kubernetes 版本 - 1.8
在 docker-for-desktop 集群 k8s 版本 1.10 上嘗試了另一個 snario
k8s清單
apiVersion: v1
kind: ConfigMap
metadata:
name: postgres-config
labels:
app: postgres
data:
POSTGRES_DB: kong
POSTGRES_USER: kong
POSTGRES_PASSWORD: kong
PGDATA: /var/lib/postgresql/data/pgdata
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: postgres-pv
labels:
app: postgres
spec:
storageClassName: manual
capacity:
storage: 1Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/postgresql/data"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: postgres-pvc
labels:
app: postgres
spec:
storageClassName: manual
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
---
apiVersion: v1
kind: Service
metadata:
name: postgres
app: postgres
spec:
ports:
- name: pgql
port: 5432
targetPort: 5432
protocol: TCP
selector:
app: postgres
---
apiVersion: apps/v1beta2 # for k8s versions before 1.9.0 use apps/v1beta2 and before 1.8.0 use extensions/v1beta1
kind: StatefulSet
metadata:
name: postgres
spec:
serviceName: "postgres"
replicas: 1
selector:
matchLabels:
app: postgres
template:
metadata:
labels:
app: postgres
spec:
containers:
- name: postgres
image: postgres:9.6
imagePullPolicy: "IfNotPresent"
ports:
- containerPort: 5432
envFrom:
- configMapRef:
name: postgres-config
volumeMounts:
- mountPath: /var/lib/postgresql/data
name: postgredb
volumes:
- name: postgredb
persistentVolumeClaim:
claimName: postgres-pvc
---
如果您有多個節點 - 您看到的問題完全在意料之中。 因此,如果您想在多節點集群中使用 hostPath 作為持久卷 - 您必須使用一些共享文件系統,如 Glusterfs 或 Ceph,並將您的 /mnt/postgresql/data 文件夾放在該共享文件系統上。
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