ISCSI客户端配置：
yum install iscsi-initiator-utils
vim /etc/iscsi/initiatorname.iscsi
InitiatorName = iqn.2014-11...:Desktop0
systemctl restart iscsid.service
systemctl enable iscsid(与服务器通讯)
systemctl restart iscsi(读取iscsi文件)
systemctl enable iscsi
iscsiadm -m discovery -t st(send target) -p server0 可以man iscsiadmin 查看
yum -y install tree
tree /var/lib/iscsi/
systemctl restart iscsi
fdisk -l 可看到/dev/sda的盘，只要保证iscsi开启并且/var/lib/iscsi里的内容还在，那么开机后就会有iscsi的盘
fdisk /dev/sda; n,p,+500M,w,partprobe
mkfs.xfs /dev/sda1
mkdir /iscsidisk; blkid 获取UUID，用来挂载
vim /etc/fstab
UUID = "..." /iscsidisk xfs defaults, _netdev 0 0
mount -a 重启后查看是否挂载
出错时可以用： rm -rf /var/lib/iscsi/* 再重新做一遍
