场景：在 非 Master 节点 添加了 1T 的磁盘，挂载到 /mnt 路径，然后实现在此存储上动态创建 PVC。
安装 NFS 工具包
所有节点 （CentOS 7）
yum -y install nfs-utils
创建 NFS Provisioner
1、新建 ServiceAccount、PodSecurityPolicy、ClusterRole、ClusterRoleBinding
apiVersion: v1
kind: ServiceAccount
metadata:
name: nfs-provisioner
---
apiVersion: extensions/v1beta1
kind: PodSecurityPolicy
metadata:
name: nfs-provisioner
spec:
fsGroup:
rule: RunAsAny
allowedCapabilities:
- DAC_READ_SEARCH
- SYS_RESOURCE
runAsUser:
rule: RunAsAny
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
volumes:
- configMap
- downwardAPI
- emptyDir
- persistentVolumeClaim
- secret
- hostPath
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: nfs-provisioner-runner
rules:
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get", "list", "watch", "create", "delete"]
- apiGroups: [""]
resources: ["persistentvolumeclaims"]
verbs: ["get", "list", "watch", "update"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["events"]
verbs: ["list", "watch", "create", "update", "patch"]
- apiGroups: [""]
resources: ["services", "endpoints"]
verbs: ["get"]
- apiGroups: ["extensions"]
resources: ["podsecuritypolicies"]
resourceNames: ["nfs-provisioner"]
verbs: ["use"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: run-nfs-provisioner
namespace: default
subjects:
- kind: ServiceAccount
name: nfs-provisioner
namespace: default
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: nfs-provisioner-runner
2、创建 NFS provisioner 服务
kind: Service
apiVersion: v1
metadata:
name: nfs-provisioner
labels:
app: nfs-provisioner
spec:
ports:
- name: nfs
port: 2049
- name: mountd
port: 20048
- name: rpcbind
port: 111
- name: rpcbind-udp
port: 111
protocol: UDP
selector:
app: nfs-provisioner
---
kind: Deployment
apiVersion: apps/v1
metadata:
name: nfs-provisioner
spec:
selector:
matchLabels:
app: nfs-provisioner
replicas: 1
strategy:
type: Recreate
template:
metadata:
labels:
app: nfs-provisioner
spec:
serviceAccountName: nfs-provisioner # 关联上述创建的 ServiceAccount
containers:
- name: nfs-provisioner
image: quay.io/kubernetes_incubator/nfs-provisioner:v1.0.9
ports:
- name: nfs
containerPort: 2049
- name: mountd
containerPort: 20048
- name: rpcbind
containerPort: 111
- name: rpcbind-udp
containerPort: 111
protocol: UDP
securityContext:
capabilities:
add:
- DAC_READ_SEARCH
- SYS_RESOURCE
args:
- "-provisioner=anoyi.com/nfs"
env:
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: SERVICE_NAME
value: nfs-provisioner
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
imagePullPolicy: "IfNotPresent"
volumeMounts:
- name: export-volume
mountPath: /export
volumes:
- name: export-volume
hostPath:
path: /mnt/k8s # 存储的挂载点
nodeSelector: # 指定提供存储的节点
kubernetes.io/hostname: lab-backend2
使用 kubectl get nodes --show-labels 命令查看节点的标签，用于 nodeSelector 选择 Pod 在哪个节点运行，hostPath 指定挂载点为当前节点的指定路径。
3、创建 StorageClass
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
name: nfs
provisioner: anoyi.com/nfs
4、创建 2 个 PVC
# 创建持久化存储卷
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvc01
annotations:
volume.beta.kubernetes.io/storage-class: "nfs"
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 10Gi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvc02
annotations:
volume.beta.kubernetes.io/storage-class: "nfs"
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 20Gi
