linux系统自带iscsi initiator调试

linux系统自带iscsi initiator调试

关键字：

iscsi;linux;initiator;自带

内容摘要：

如何调试linux系统自带iscsi initiator。

一系统缺陷

1 linux主机系统自带的iscsi驱动装上后目录/usr/sbin里面没有iscsi-mountall和iscsi-umountall

2 /etc里有initiatorname.iscsi文件，但第一次添加InitiatorName=iqn.108无用

运行一下/etc/init.d/iscsi start后/etc/initiatorname.iscsi文件会重新生成。

在/etc/initiatorname.iscsi文件里添加InitiatorName=iqn.108这句话

3 在/etc/里面有fstab但没有fstab.iscsi

4 /etc/init.d/iscsi脚本里没有

# if we have an iSCSI fstab, process it

        if [ -f /etc/fstab.iscsi ] ; then

            echo -n " fsck/mount"

            sleep 6

            iscsi-mountall

        fi

和

        # unmount all filesystems on iSCSI devices

        echo -n " umount"

        iscsi-umountall -t -k

        echo -n " sync"

        sync

        sleep 3

这两段语句。

二导致如下问题：

1 虽然说在/etc/fstab里加入iscsi设备

/dev/sda1               /hlj                    ext3    defaults        0 0

系统重起时会加载成功。

但关闭系统或运行/etc/init.d/iscsi stop

会提示错误

如

[root@localhost init.d]# ./iscsi stop

Stopping iscsid:                                           [  OK  ]

Removing iscsi driver: ERROR: Module iscsi_sfnet is in use

                                                           [FAILED]

因为iscsi脚本里还没有mount,umount语句

系统不会自动umount掉iscsi硬盘。

2

如果scm 上的initiator name=iqn.108加上CHAP

命令：

initiator modify name = iqn.108 authentication = CHAP

New CHAP authentication key:123456789123

Retype authentication key:123456789123

主机端：

先手动umount掉iscsi硬盘然后执行。

[root@localhost init.d]# ./iscsi stop

Stopping iscsid:                                           [  OK  ]

Removing iscsi driver:                                     [  OK  ]

[root@localhost init.d]# ./iscsi start

Checking iscsi config:                                     [  OK  ]

Loading iscsi driver:                                      [  OK  ]

Starting iscsid:                                           [  OK  ]

[root@localhost init.d]# iscsi-ls

*******************************************************************************

SFNet iSCSI Driver Version ...4:0.1.11(12-Jan-2005)

*******************************************************************************

可以看到无target端。

因为iscsi里还没有iscsi-mountall和iscsi-umountal所以CHAP起不了作用。

三 解决方法：

1在/sbin里拷入iscsi-mountall和iscsi-umountal文件

从windows系统的共享的  as4iscsi/iscsi_initiator/linux-iscsi-4.0.1.11/linux-iscsi-4.0.1.11/linux-iscsi-

/misc/scripts

目录下拷完后。给与文件权限

[root@localhost sbin]# chmod 777 iscsi-umountall

[root@localhost sbin]# chmod 777 iscsi-mountall

2在/etc里建立fstab.iscsi文件

添加

/dev/sda1               /hlj                    ext3    defaults        0 0

3 在/etc/init.d/iscsi脚本里添加

# if we have an iSCSI fstab, process it

        if [ -f /etc/fstab.iscsi ] ; then

            echo -n " fsck/mount"

            sleep 6

            iscsi-mountall

        fi

和

        # unmount all filesystems on iSCSI devices

        echo -n " umount"

        iscsi-umountall -t -k

        echo -n " sync"

        sync

        sleep 3

这两段语句。

位置参看蓝色语句位置。如下：

# Make sure the K*iscsi scripts get called

        if [ -d /var/lock/subsys ] ; then

            touch /var/lock/subsys/iscsi

        fi

        # if we have an iSCSI fstab, process it

        if [ -f /etc/fstab.iscsi ] ; then

            echo -n " fsck/mount"

            sleep 6

            iscsi-mountall

        fi

        echo ""

        ;;

 stop)

        # if iSCSI network boot then exit.

        if iscsi_network_boot ; then

            echo "Since it is an iSCSI network boot therefore, driver cannot be stopped/restarted"

            exit 1

        fi

        echo -n "Stopping iSCSI:"

        for hba in /proc/scsi/iscsi/* ; do

            echo "connfailtimeout - - $CONNFAILTIMEOUT" > $hba

            echo "diskcommandtimeout - - $DISKCOMMANDTIMEOUT" > $hba

        done

        echo -n " sync"

        sync

        # unmount all filesystems on iSCSI devices

        echo -n " umount"

        iscsi-umountall -t -k

        echo -n " sync"

        sync

        sleep 3

        if [ -f $PIDFILE ] ; then

            echo -n " iscsid"

            kill -TERM `head -n 1 $PIDFILE`

            sleep 2

            killall $BASEDIR/sbin/iscsid > /dev/null 2>&1

            killall iscsid > /dev/null 2>&1

            rm -f $PIDFILE

        fi

        # shutdown the kernel module

        if [ -d /proc/scsi/iscsi ] ; then

            echo -n " iscsi"

            for hba in /proc/scsi/iscsi/* ; do

5然后在/etc/iscsi.conf中加

DiscoveryAddress=192.168.10.200:3260

  OutgoingUsername=iqn.108

  OutgoingPassword=123456789123

           and/or

如不加这段启动service iscsi restart 出现如下错误

fsck/mount[root@localhost ~]# fsck.ext3: No such file or directory while trying to open /dev/sda1

*** device not yet available, 9 retries remaining

fsck.ext3: No such file or directory while trying to open /dev/sda1

四 检验结果

以上步骤都做好以后，重新启动iscsi服务

[root@localhost sbin]# service iscsi restart

Stopping iscsid:  umount sync                              [  OK  ]

Removing iscsi driver:                                     [  OK  ]

Checking iscsi config:                                     [  OK  ]

Loading iscsi driver:                                      [  OK  ]

Starting iscsid:                                           [  OK  ]

 fsck/mount[root@localhost sbin]# mount

/dev/hda2 on / type ext3 (rw)

none on /proc type proc (rw)

none on /sys type sysfs (rw)

none on /dev/pts type devpts (rw,gid=5,mode=620)

none on /dev/shm type tmpfs (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

nfsd on /proc/fs/nfsd type nfsd (rw)

/dev/sda1 on /hlj type ext3 (rw)

可以看到iscsi硬盘正常挂接成功。