我是kubernetes的新手,我正在尝试在statefulset
中添加PVC。
PV和PVC如下所示:
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
neo4j-backups 5Gi RWO Retain Bound default/backups-claim manual 1h
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
backups-claim Bound neo4j-backups 5Gi RWO manual 51m
基本上我希望statefulset的所有pod都能看到该卷的内容,因为备份文件存储在那里。
使用的Statefulset可以找到here
Minikube版本:
minikube version: v0.25.2
Kubernetes版本:GitVersion:"v1.9.4"
答案 0 :(得分:2)
如果您在volumeClaimTemplates
k8中使用StatefulSet
,则会进行动态配置&为每个吊舱创建一个PVC和相应的PV,因此每个吊舱都有自己的存储空间。
你想要的是创造一个PV&一个PVC并在Statefulset的所有副本中使用它。
以下是Kubernetes 1.10的示例,如何执行此操作,其中/var/www/html
将由所有三个Pod共享,只需将/directory/on/host
更改为计算机上的某个本地目录。我也在minikube v0.26.0上运行了这个例子
下面的例子只是一个例子来说明这个想法,但在一个真实的例子中,Pod中的流程应该知道同步访问共享存储。
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: example-pv
spec:
capacity:
storage: 100Gi
# volumeMode field requires BlockVolume Alpha feature gate to be enabled.
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Delete
storageClassName: local-storage
local:
path: /directory/on/host
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- minikube
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: example-local-claim
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 5Gi
storageClassName: local-storage
---
apiVersion: "apps/v1beta1"
kind: StatefulSet
metadata:
name: nginx
spec:
serviceName: nginx
replicas: 3
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx-container
image: "nginx:1.12.2"
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: localvolume
mountPath: /var/www/html
volumes:
- name: localvolume
persistentVolumeClaim:
claimName: example-local-claim