Server iSCSI на Ubuntu 18.04

конфигурирование (установка и настройка дистрибутивов GNU/Linux, программного обеспечения и др.)
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Роман Торопов
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Server iSCSI на Ubuntu 18.04

Сообщение Роман Торопов » 07 янв 2020, 03:44

Установка:

Код: Выделить всё

apt install tgt dkms
Создаём каталог для образа диска

Код: Выделить всё

mkdir /mnt/sdc/iscsi
Создаём образ диска 2GB

Код: Выделить всё

dd if=/dev/zero of=/mnt/sdc/iscsi/disk01.img bs=1M count=2K
Если его нужно увеличить на 1TB

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dd if=/dev/zero bs=1M count=1024K >> disk01.img
Создаём файл конфигурации сервера

Код: Выделить всё

nano /etc/tgt/conf.d/target01.conf
Содержимое:

Код: Выделить всё

# naming rule : [ iqn.yaer-month.domain:any name ]
<target iqn.2020-01.home:target01>
    # provided devicce as a iSCSI target
    backing-store /var/lib/iscsi_disks/disk01.img
    # iSCSI Initiator's IP address you allow to connect
    # initiator-address 192.168.1.10
    # authentication info (set anyone you like for "username", "password") 
    # incominguser username password1234
</target>
Перезапускаем сервер

Код: Выделить всё

systemctl restart tgt
Проверяем

Код: Выделить всё

tgtadm --mode target --op show
Всё, сервер готов, теперь на клиенте винды идём
Средства администрирования -> Инициатор iSCSI
подключаемся ...
В управлении дисками инициализируем, создаём партицию, всё как на обычном локальном диске ...

Примеры конфига

Код: Выделить всё

# This is a sample config file for tgt-admin.
# By default, tgt-admin looks for its config file in /etc/tgt/targets.conf

# This one includes other config files:

include /etc/tgt/temp/*.conf


# Set the driver. If not specified, defaults to "iscsi".

default-driver iscsi


# Set iSNS parameters, if needed

#iSNSServerIP 192.168.111.222
#iSNSServerPort 3205
#iSNSAccessControl On
#iSNS On

# Continue if tgtadm exits with non-zero code (equivalent of
# --ignore-errors command line option)
#ignore-errors yes


# Sample target with one LUN only. Defaults to allow access for all initiators:

<target iqn.2008-09.com.example:server.target1>
    backing-store /dev/LVM/somedevice
</target>


# Similar, but we use "direct-store" instead of "backing-store".
# "direct-store" reads drive parameters with sg_inq command and sets them to
# the target.
# Parameters fatched with sg_inq are:
# - Vendor identification
# - Product identification
# - Product revision level
# - Unit serial number (if present)
# We also specify "incominguser".

<target iqn.2008-09.com.example:server.target2>
    direct-store /dev/sdd
    incominguser someuser secretpass12
</target>


# An example with multiple LUNs, disabled write-cache (tgtd enables write-cache
# by default) and vendor identification set to "MyVendor"

<target iqn.2008-09.com.example:server.target3>
    backing-store /dev/LVM/somedevice1	# Becomes LUN 1
    backing-store /dev/LVM/somedevice2	# Becomes LUN 2
    backing-store /dev/LVM/somedevice3	# Becomes LUN 3
    write-cache off
    vendor_id MyCompany Inc.
</target>


# Similar to the one above, but we fetch vendor_id, product_id, product_rev and
# scsi_sn from the disks.
# Vendor identification (vendor_id) is replaced in all disks by "MyVendor"

<target iqn.2008-09.com.example:server.target4>
    direct-store /dev/sdb	# Becomes LUN 1
    direct-store /dev/sdc	# Becomes LUN 2
    direct-store /dev/sdd	# Becomes LUN 3
    write-cache off
    vendor_id MyCompany Inc.
</target>


# Note that "first-device-first-lun numbering" will work only for simple
# scenarios above, where _only_ direct-store _or_ backing-store is used.
# If you mix backing-store and direct-store, then all backing-store entries
# are processed before direct-store-entries.

<target iqn.2008-09.com.example:server.target4>
    direct-store /dev/sdb	# Becomes LUN 3
    backing-store /dev/sdc	# Becomes LUN 1
    direct-store /dev/sdd	# Becomes LUN 4
    backing-store /dev/sde	# Becomes LUN 2
</target>


# Even more complicated example - each device has different parameters.
# You can use indentation to make the config file more readable.
# Note that LUNs will be assigned more or less randomly here (and still
# backing-store get LUNs assigned before drect-store).
# You can specify multiple mode_page parameters (they are commented out
# in this example).
# Note that some parameters (write-cache, scsi_sn) were specified "globally".
# "Global" parameters will be applied to all LUNs; they can be overwritten
# "locally", per LUN.
# If lun is not specified, it will be allocated automatically (first available).

<target iqn.2008-09.com.example:server.target5>

    <direct-store /dev/sdd>
	vendor_id VENDOR1
	removable 1
	device-type cd
	lun 1
    </direct-store>

    <direct-store /dev/sda>
	vendor_id VENDOR2
	lun 2
    </direct-store>

    <backing-store /dev/sdb1>
	vendor_id back1
	scsi_sn SERIAL
	write-cache on
	# lun 3		# lun is commented out - will be allocated automatically
    </backing-store>

    <backing-store /dev/sdd1>
	vendor_id back2
	#mode_page 8:0:18:0x10:0:0xff....
	#mode_page 8:0:18:0x10:0:0xff....
	#bs-type aio
	#params element_type=4,start_address=500,quantity=3,media_home=/root/tapes
	#params element_type=4,address=500,tid=1,lun=1
	lun 15
    </backing-store>

    # Some more parameters which can be specified locally or globally:
    #scsi_id ...
    #scsi_sn ...
    #vendor_id ...
    #product_id ...
    #product_rev ...
    #sense_format ...
    #removable ...
    #online ...
    #readonly ...
    #path ...
    #mode_page 8:0:18:0x10:0:0xff....
    #mode_page 8:0:18:0x10:0:0xff....
    #device-type ...
    #bs-type ...	# backing store type - default rdwr, can be aio, etc...
    #params element_type=4,start_address=500,quantity=3,media_home=/root/tapes
    #params element_type=4,address=500,tid=1,lun=1
    #allow-in-use yes	# if specified globally, can't be overwritten locally

    write-cache off
    scsi_sn multipath-10

    # Parameters below are only global. They can't be configured per LUN.
    # Only allow connections from 192.168.100.1 and 192.168.200.5
    initiator-address 192.168.100.1
    initiator-address 192.168.200.5

    # Tuning parameters (global, per target)
    #MaxRecvDataSegmentLength 8192
    #MaxXmitDataSegmentLength 8192
    #HeaderDigest None
    #DataDigest None
    #InitialR2T Yes
    #MaxOutstandingR2T 1
    #ImmediateData Yes
    #FirstBurstLength 65536
    #MaxBurstLength 262144
    #DataPDUInOrder Yes
    #DataSequenceInOrder Yes
    #ErrorRecoveryLevel 0
    #IFMarker No
    #OFMarker No
    #DefaultTime2Wait 2
    #DefaultTime2Retain 20
    #OFMarkInt Reject
    #IFMarkInt Reject
    #MaxConnections 1

    # Allowed incoming users
    incominguser user1 secretpass12
    incominguser user2 secretpass23

    # Outgoing user
    outgoinguser userA secretpassA

    # TID of controller
    controller_tid 10
</target>


# The device will have lun 1 unless you specify something else
<target iqn.2008-09.com.example:server.target6>
    backing-store /dev/LVM/somedevice
    lun 10
</target>


# Devices which are in use (by system: mounted, for swap, part of RAID, or by
# userspace: dd, by tgtd for another target etc.) can't be used, unless you use
# --force flag or add 'allow-in-use yes' option
<target iqn.2008-09.com.example:server.target7>
    backing-store /dev/LVM/somedevice
    allow-in-use yes
</target>

<target iqn.2008-09.com.example:server.target8>
    <backing-store /dev/LVM/somedevice>
        scsi_sn serial1
    </backing-store>

    <backing-store /dev/LVM/somedevice2>
        scsi_sn serial2
    </backing-store>

    allow-in-use yes
</target>

# Specify controller TID of target
# Must be unique for all targets
# To reduce risk of duplicating controller TIDs, specify TID for all targets
# or none
<target iqn.2008-09.com.example:server.target9>
    backing-store /dev/LVM/somedevice
    allow-in-use yes
    controller_tid 10
</target>




# Not supported configurations, and therefore, commented out:

#<target iqn.2008-09.com.example:server.badtarget1>
#    backing-store /dev/LVM/somedevice1
#    backing-store /dev/LVM/somedevice2
#    lun 10
#    lun 11
#</target>

#<target iqn.2008-09.com.example:server.badtarget2>
#    <direct-store /dev/sdd>
#        vendor_id VENDOR1
#    </direct-store>
#
#    direct-store /dev/sdc
#</target>

# This one will break the parser:

#<target iqn.2008-09.com.example:server.badtarget3>
#    <direct-store /dev/sdd>
#        vendor_id VENDOR1
#    </direct-store>
#
#    direct-store /dev/sdc
#
#    <direct-store /dev/sdd>
#        vendor_id VENDOR1
#    </direct-store>
#</target>
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