iSCSI( Internet Small Computer System Interface 互联网小型计算机系统接口)是一种基于TCP/IP 的协议，用来建立和管理IP存储设备、主机和客户机等之间的相互连接，并创建存储区域网络（SAN）。SAN 使得SCSI 协议应用于高速数据传输网络成为可能，这种传输以数据块级别（block-level）在多个数据存储网络间进行。SCSI 结构基于C/S模式，其通常应用环境是：设备互相靠近，并且这些设备由SCSI 总线连接。
$ kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0 5G RWO Delete Bound default/jenkins-claim openebs-standard 1h
$ kubectl get pvc
kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
jenkins-claim Bound pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0 5G RWO openebs-standard 1h
查看Jenkins pod
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 29m (x2 over 29m) default-scheduler PersistentVolumeClaim is not bound: "jenkins-claim" (repeated 3 times)
Normal Scheduled 29m default-scheduler Successfully assigned jenkins-668dfbd847-vhg4c to 172.20.0.115
Normal SuccessfulMountVolume 29m kubelet, 172.20.0.115 MountVolume.SetUp succeeded for volume "default-token-3l9f0"
Warning FailedMount 27m kubelet, 172.20.0.115 Unable to mount volumes for pod "jenkins-668dfbd847-vhg4c_default(8e2ad467-f1e5-11e7-aa47-f4e9d49f8ed0)": timeout expired waiting for volumes to attach/mount for pod "default"/"jenkins-668dfbd847-vhg4c". list of unattached/unmounted volumes=[jenkins-home]
Warning FailedSync 27m kubelet, 172.20.0.115 Error syncing pod
Normal SuccessfulMountVolume 26m kubelet, 172.20.0.115 MountVolume.SetUp succeeded for volume "pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0"
Normal Pulling 26m kubelet, 172.20.0.115 pulling image "harbor-001.jimmysong.io/library/jenkins:lts"
Normal Pulled 26m kubelet, 172.20.0.115 Successfully pulled image "harbor-001.jimmysong.io/library/jenkins:lts"
Normal Created 26m kubelet, 172.20.0.115 Created container
Normal Started 26m kubelet, 172.20.0.115 Started container
