CentOS 7.x 下配置iSCSI网络存储
2016-10-31 12:03
561 查看
一、iSCSI简介
iSCSI(internet SCSI)技术由IBM公司研究开发,是一个供硬件设备使用的、可以在IP协议的上层运行的SCSI指令集,这种指令集合可以实现在IP网络上运行SCSI协议,使其能够在诸如高速千兆以太网上进行路由选择。iSCSI技术是一种新储存技术,该技术是将现有SCSI接口与以太网络(Ethernet)技术结合,使服务器可与使用IP网络的储存装置互相交换资料。iSCSI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。
iSCSI 的主要功能是在TCP/IP 网络上的主机系统(启动器 initiator)和存储设备(目标器
完整的iSCSI系统的拓扑结构如下:
备注:上面一段内容出处:http://www.cnblogs.com/mchina/p/centos-iscsi-network-storage.html
二、实验环境
操作系统:CentOS Linux release 7.2.1511 (Core)iSCSI Target:10.1.1.56 / vdevops.org
iSCSI Initiator:10.1.1.53 / linuxprobe.org
防火墙已关闭/iptables: Firewall is not running.
SELINUX已禁用:SELINUX=disabled
三、配置iSCSI Target
首先安装管理工具[root@vdevops ~]# yum -y install targetcli
配置iSCSI目标。
例如,在/ iscsi_disks目录下创建磁盘映像并将其设置为SCSI设备
#进入管理控制台 [root@vdevops ~]# targetcli Warning: Could not load preferences file /root/.targetcli/prefs.bin. targetcli shell version 2.1.fb41 Copyright 2011-2013 by Datera, Inc and others. For help on commands, type 'help'. #在/iscsi_disks/disk01.img上使用2G创建名为“disk01”的磁盘映像 /> cd backstores/fileio /backstores/fileio> create disk01 /iscsi_disks/disk01.img 2G Created fileio disk01 with size 2147483648 /backstores/fileio> cd /iscsi #创建目标 /iscsi> create iqn.2016-10.vdevops.org:storage.target00 Created target iqn.2016-10.vdevops.org:storage.target00. Created TPG 1. Global pref auto_add_default_portal=true Created default portal listening on all IPs (0.0.0.0), port 3260. /iscsi> cd iqn.2016-10.vdevops.org:storage.target00/tpg1/luns #设置 luns /iscsi/iqn.20...t00/tpg1/luns> create /backstores/fileio/disk01 Created LUN 0. /iscsi/iqn.20...t00/tpg1/luns> cd ../acls /iscsi/iqn.20...t00/tpg1/acls> create iqn.2016-10.vdevops.org:vdevops.org Created Node ACL for iqn.2016-10.vdevops.org:vdevops.org Created mapped LUN 0. #设置ACL(它是允许连接的启动器的IQN) /iscsi/iqn.20...t00/tpg1/acls> cd iqn.2016-10.vdevops.org:vdevops.org/ #设置用于验证的UserID /iscsi/iqn.20...g:vdevops.org> set auth userid=username Parameter userid is now 'username'. /iscsi/iqn.20...g:vdevops.org> set auth password=password Parameter password is now 'password'. /iscsi/iqn.20...g:vdevops.org> exit Global pref auto_save_on_exit=true Last 10 configs saved in /etc/target/backup. Configuration saved to /etc/target/saveconfig.json [root@vdevops ~]# ss -napt | grep 3260 LISTEN 0 256 *:3260 *:* [root@vdevops ~]# systemctl enable target Created symlink from /etc/systemd/system/multi-user.target.wants/target.service to /usr/lib/systemd/system/target.service. [root@vdevops ~]# firewall-cmd --add-service=iscsi-target --permanent success [root@vdevops ~]# firewall-cmd --reload success
使用iSCSI配置存储服务器
这是使用scsi-target-utils配置iSCSI目标的示例
[1] 安装 scsi-target-utils. # 使用EPEL源安装 [root@vdevops ~]# yum --enablerepo=epel -y install scsi-target-utils [2]配置iSCSI目标。 例如,在[/ iscsi_disks]目录下创建磁盘映像并将其设置为共享磁盘。 # 创建硬盘镜像 [root@vdevops ~]# mkdir /iscsi_disks #无需重复创建 [root@vdevops ~]# dd if=/dev/zero of=/iscsi_disks/disk01.img count=0 bs=1 seek=2G #同样无需重复创建 [root@vdevops iscsi_disks]# vi /etc/tgt/targets.conf <target iqn.2016-10.vdevops.org:target00> # provided devicce as a iSCSI target # backing-store /iscsi_disks/disk01.img # iSCSI Initiator's IP address you allow to connect # initiator-address 10.1.1.53 # authentication info ( set anyone you like for "username", "password" ) # incominguser username password </target> [3]如果SElinux为enable状态, 改变SElinux类型. [root@vdevops ~]# chcon -R -t tgtd_var_lib_t /iscsi_disks [root@vdevops ~]# semanage fcontext -a -t tgtd_var_lib_t /iscsi_disks [4]如果防火墙开启,允许iSCSI Target服务 [root@vdevops ~]# firewall-cmd --add-service=iscsi-target --permanent success [root@vdevops ~]# firewall-cmd --reload success
启动 tgtd并验证状态
[root@vdevops ~]# systemctl start tgtd [root@vdevops ~]# systemctl status tgtd ● tgtd.service - tgtd iSCSI target daemon Loaded: loaded (/usr/lib/systemd/system/tgtd.service; disabled; vendor preset: disabled) Active: active (running) since Mon 2016-10-31 20:46:10 CST; 7s ago Process: 2860 ExecStartPost=/usr/sbin/tgtadm --op update --mode sys --name State -v ready (code=exited, status=0/SUCCESS) Process: 2830 ExecStartPost=/usr/sbin/tgt-admin -e -c $TGTD_CONFIG (code=exited, status=0/SUCCESS) Process: 2829 ExecStartPost=/usr/sbin/tgtadm --op update --mode sys --name State -v offline (code=exited, status=0/SUCCESS) Process: 2828 ExecStartPost=/bin/sleep 5 (code=exited, status=0/SUCCESS) Main PID: 2827 (tgtd) CGroup: /system.slice/tgtd.service └─2827 /usr/sbin/tgtd -f Oct 31 20:46:04 vdevops.org systemd[1]: Starting tgtd iSCSI target daemon... Oct 31 20:46:04 vdevops.org tgtd[2827]: tgtd: iscsi_tcp_init_portal(347) unable to bind server socket, Address already in use Oct 31 20:46:04 vdevops.org tgtd[2827]: tgtd: iser_ib_init(3436) Failed to initialize RDMA; load kernel modules? Oct 31 20:46:04 vdevops.org tgtd[2827]: tgtd: work_timer_start(146) use timer_fd based scheduler Oct 31 20:46:04 vdevops.org tgtd[2827]: tgtd: bs_init_signalfd(267) could not open backing-store module directory /usr/lib64/tgt/backing-store Oct 31 20:46:04 vdevops.org tgtd[2827]: tgtd: bs_init(386) use signalfd notification Oct 31 20:46:10 vdevops.org tgtd[2827]: tgtd: device_mgmt(246) sz:29 params:path=/iscsi_disks/disk01.img Oct 31 20:46:10 vdevops.org tgtd[2827]: tgtd: bs_thread_open(408) 16 Oct 31 20:46:10 vdevops.org systemd[1]: Started tgtd iSCSI target daemon. Hint: Some lines were ellipsized, use -l to show in full. [root@vdevops ~]# systemctl enable tgtd Created symlink from /etc/systemd/system/multi-user.target.wants/tgtd.service to /usr/lib/systemd/system/tgtd.service. #查看状态 [root@vdevops ~]# tgtadm --mode target --op show Target 1: iqn.2016-10.world.srv:target00 System information: Driver: iscsi State: ready I_T nexus information: LUN information: LUN: 0 Type: controller SCSI ID: IET 00010000 SCSI SN: beaf10 Size: 0 MB, Block size: 1 Online: Yes Removable media: No Prevent removal: No Readonly: No SWP: No Thin-provisioning: No Backing store type: null Backing store path: None Backing store flags: LUN: 1 Type: disk SCSI ID: IET 00010001 SCSI SN: beaf11 Size: 2147 MB, Block size: 512 Online: Yes Removable media: No Prevent removal: No Readonly: No SWP: No Thin-provisioning: No Backing store type: rdwr Backing store path: /iscsi_disks/disk01.img Backing store flags: Account information: username ACL information: 10.1.1.53
配置iSCSI启动器
#使用EPEL安装iscsi-initiator-utils [root@linuxprobe ~]# yum -y install iscsi-initiator-utils [root@linuxprobe ~]# vi /etc/iscsi/initiatorname.iscsi # change to the same IQN you set on the iSCSI target server InitiatorName=iqn.2016-10.vdevops.org:vdevops.org [root@linuxprobe ~]# vi /etc/iscsi/iscsid.conf # line 57: 取消注释 node.session.auth.authmethod = CHAP # line 61,62: 取消注释 and specify the username and password you set on the iSCSI target server node.session.auth.username = username node.session.auth.password = password # 发现target [root@linuxprobe ~]# iscsiadm -m discovery -t sendtargets -p 10.1.1.56 10.1.1.56:3260,1 iqn.2016-10.vdevops.org:storage.target00 [root@linuxprobe ~]# iscsiadm -m node -o show # BEGIN RECORD 6.2.0.873-33.2 node.name = iqn.2016-10.vdevops.org:storage.target00 node.tpgt = 1 node.startup = automatic node.leading_login = No ... ... node.conn[0].iscsi.MaxXmitDataSegmentLength = 0 node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144 node.conn[0].iscsi.HeaderDigest = None node.conn[0].iscsi.IFMarker = No node.conn[0].iscsi.OFMarker = No # END RECORD #登录target [root@linuxprobe ~]# iscsiadm -m node --login Logging in to [iface: default, target: iqn.2016-10.vdevops.org:storage.target00, portal: 10.1.1.56,3260] (multiple) Login to [iface: default, target: iqn.2016-10.vdevops.org:storage.target00, portal: 10.1.1.56,3260] successful. #确认连接状态 [root@linuxprobe ~]# iscsiadm -m session -o show tcp: [1] 10.1.1.56:3260,1 iqn.2016-10.vdevops.org:storage.target00 (non-flash) #确认分区状况 [root@linuxprobe ~]# cat /proc/partitions major minor #blocks name 2 0 4 fd0 8 0 20971520 sda 8 1 512000 sda1 8 2 20458496 sda2 11 0 4228096 sr0 253 0 18317312 dm-0 253 1 2097152 dm-1 8 16 2097152 sdb #从目标服务器提供的添加的新设备为“sdb”
设置iSCSI设备后,在启动器上配置如下所示
#创建标签 [root@linuxprobe ~]# parted --script /dev/sdb "mklabel msdos" # 创建分区 [root@linuxprobe ~]# parted --script /dev/sdb "mkpart primary 0% 100%" # 格式化分区 [root@linuxprobe ~]# mkfs.xfs -i size=1024 -s size=4096 /dev/sdb1 meta-data=/dev/sdb1 isize=1024 agcount=4, agsize=130560 blks = sectsz=4096 attr=2, projid32bit=1 = crc=0 finobt=0 data = bsize=4096 blocks=522240, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 # 挂载分区 [root@linuxprobe ~]# mount /dev/sdb1 /mnt/ # 查看系统挂载 [root@linuxprobe ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 18G 1.9G 16G 11% / devtmpfs devtmpfs 483M 0 483M 0% /dev tmpfs tmpfs 493M 0 493M 0% /dev/shm tmpfs tmpfs 493M 6.7M 487M 2% /run tmpfs tmpfs 493M 0 493M 0% /sys/fs/cgroup /dev/sda1 xfs 497M 125M 373M 26% /boot tmpfs tmpfs 99M 0 99M 0% /run/user/0 **/dev/sdb1 xfs 2.0G 33M 2.0G 2% /mnt**
到此,我们可以看到ISCSI配置完成,可以正常使用。
ISCSI百度百科:http://baike.baidu.com/link?url=-OA1le_DbAh5ybVq1ZBTbPHJqQb5-jma5vhKR5nCAC7C11UDSwNn_6mPYj0AiABrm8OM2MoExN__9GvzvhVg8K
相关文章推荐
- centos7 的iscsi网络存储配置
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 6配置iSCSI网络存储
- CentOS 6.3下配置iSCSI网络存储
- CentOS 配置iSCSI网络存储
- centosISCSI网络存储服务
- centos 挂载iscsi 连接网络存储 vnxe
- centos上iscsi+multipath多路径存储配置手册
- centos上iscsi+multipath多路径存储配置手册
- centos6.4挂载iscsi网络存储 推荐
- Linux下配置iscsi网络存储
- 最新Linux(CentOS5.5)搭建GFS系统--iSCSI+GFS实现网络存储
- 红帽GFS集群文件系统配置指南 linux搭建gfs系统--iscsi+GFS实现网络存储
- SAN iSCSI网络存储配置+ iSCSI网络集群