centos6.x 安装 iscsi 网络磁盘
centos 安装 iscsi 服务
首先安装管理工具
yum -y install targetcli iscsi-initiator-utils-devel iscsi-initiator-utils
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*
扫描 tag 存储
iscsiadm -m discovery -t sendtargets -p 192.168.192.9
挂载 iscsi 存储
iscsiadm -m node -T iqn.2000-01.com.synology:backup.Target-1.fd5cc45e3e -p 192.168.192.9:3260 -l
卸载 iscsi 网络 存储
iscsiadm -m node -T iqn.2000-01.com.synology:backup.Target-1.fd5cc45e3e -u
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