k8s的StorageClass存储类和pv、pvc、provisioner、物理存储的链路
k8s的StorageClass存储类和pv、pvc、provisioner、物理存储的链路
StorageClass能自动创建pv
在控制器中,直接声明storageClassName,不仅能自动创建pvc,也能自动创建pv
stoageclass来自于provisioner,provisioner来自于pod,pod来自于镜像。也就是provisioner的镜像。镜像里面有提供provisioner相关的代码。
nfs-subdir-external-provisioner:v4.0.2 这个镜像生成的nas盘上的目录名称的定义规则是:namespace-pvc-pv。这个是在nfs-subdir-external-provisioner:v4.0.2的镜像里面写好的
StorageClass是一种kind,也就是一种k8s的API资源,是一个动态存储卷。
先看pv、pvc:
kubectl get sc # storageclass
kubectl get sa # serviceaccount
# StorageClass (iscsi-scsi-storage.yaml)
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:name: iscsi-scsi-storage
provisioner: example.com/iscsi
parameters:targetPortal: "192.168.1.100:3260"lun: "0"fsType: "ext4"chapAuthEnabled: "true"# StatefulSet (postgres-statefulset.yaml)
apiVersion: apps/v1
kind: StatefulSet
metadata:name: postgres-cluster
spec:replicas: 3selector:matchLabels:app: postgrestemplate:spec:containers:- name: postgresimage: postgres:14volumeMounts:- name: postgres-datamountPath: /var/lib/postgresql/datavolumeClaimTemplates:- metadata:name: postgres-dataspec:accessModes: [ "ReadWriteOnce" ]storageClassName: iscsi-scsi-storageresources:requests:storage: 1Ti