红帽全球峰会4.9.3. iSCSI 卷安全
用户使用 PersistentVolumeClaim 对象请求存储。这个声明只在用户的命名空间中有效，且只能被在同一命名空间中的 pod 调用。尝试使用其他命名空间中的持久性卷声明会导致 pod 失败。
每个 iSCSI LUN 都需要可以被集群中的所有节点访问。
另外，OpenShift 可使用 CHAP 在 iSCSI 目标中验证自己：
apiVersion: v1
kind: PersistentVolume
metadata:
name: iscsi-pv
spec:
capacity:
storage: 1Gi
accessModes:
- ReadWriteOnce
iscsi:
targetPortal: 10.0.0.1:3260
iqn: iqn.2016-04.test.com:storage.target00
lun: 0
fsType: ext4
chapAuthDiscovery: true
chapAuthSession: true
secretRef:
name: chap-secret 
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