Вы можете установить и настроить таргет COMSTAR Internet SCSI (iSCSI) и сделать его доступным в сети. iSCSI может работать по обычному Интернет-соединению (такому как Ethernet), используя стандартный протокол iSCSI. Протокол iSCSI также поддерживает сервисы naming и discovery, сервисы аутентификации с использованием CHAP и RADIUS, и централизованное управление через iSNS.
Если в системе есть хотя бы один InfiniBand (IB) Host Channel Adapter (HCA) и имеется соединение инициатор-таргет, то iSCSI соединение использует iSCSI Extensions for RDMA (iSER) для расширенной передачи данных. При использовании из IB HCA, iSER обеспечивает широкую полосу пропускания, низкую загрузку CPU и единственное сетевое соединение, которое может использоваться одновременно несколькими протоколами.
Оба - и таргет, и инициатор iSER - используют компоненту под названинем iSCSI Data Mover для обеспечения iSCSI соединения. iSER подключается автоматически, когда и таргет, и инициатор настроены на работу с IP адресом, соответствующим IB-устройству.
Установите ПО сервера хранения данных COMSTAR.
target# pkg install group/feature/storage-server Packages to install: 75 Create boot environment: No Services to restart: 7 DOWNLOAD PKGS FILES XFER (MB) Completed 75/75 9555/9555 105.7/105.7 PHASE ACTIONS Install Phase 13347/13347 PHASE ITEMS Package State Update Phase 75/75 Image State Update Phase 2/2 Loading smf(5) service descriptions: 17/17 Loading smf(5) service descriptions: 3/3 PHASE ITEMS Reading Existing Index 8/8 Indexing Packages 75/75 Indexing Packages 75/75 Optimizing Index... PHASE ITEMS Indexing Packages 573/573Перезагрузите систему или запустите сервис
stmf.target# svcadm enable stmf # svcs stmf STATE STIME FMRI online 09:42:32 svc:/system/stmf:default
Как сделать резервную копию и восстановить конфигурацию COMSTAR
После создания конфигурации COMSTAR сделайте её резервную копию, чтоб при необходимости её можно было восстановить.
Станьте администратором.
Сделайте экспорт текущей конфигурации COMSTAR.
# svccfg export -a stmf > COMSTAR.backup
При необходимости восстановите экспортированную ранее конфигурацию.
# svccfg import COMSTAR.backup
Как создать iSCSI LUN
Провайдер логических устройств для создания LUN-ов типа диск называется sbd. Конечно, перед тем, как расшарить LUN дискового типа, необходимо инициализировать хранилище логического устройства.
Предоставляемый сервером дисковый том называется target. Когда LUN будет ассоциирован с таргетом iSCSI, инициатор iSCSI может получить доступ к нему.
Процесс создания SCSI LUN выглядит примерно так:
Инициализируйте хранилище LUN, известное также как backing store.
Создайте SCSI LUN с использованием backing store.
При создании LUN он получает глобальный уникальный идентификатор (GUID), например, 600144F0B5418B0000004DDAC7C10001. Этот GUID используется для ссылки на LUN в последующих задачах, таких как мапирование LUN на выбранные хосты.
Следующие шаги нужно выполнить на системе, которая предоставляет запоминающее устройство.
Создайте ZFS pool.
target# zpool create sanpool mirror c2t3d0 c2t4d0
Создайте том ZFS, который будет использоваться как SCSI LUN.
target# zfs create -V 2g sanpool/vol1
Создайте LUN для тома ZFS.
target# stmfadm create-lu /dev/zvol/rdsk/sanpool/vol1 Logical unit created: 600144F0B5418B0000004DDAC7C10001
Путь к тому ZFS Вы можете найти в директории
/dev/zvol/rdsk/pool-name/ .Проверьте, что LUN создался.
target# stmfadm list-lu LU Name: 600144F0B5418B0000004DDAC7C10001
Добавьте LUN view.
Эта команда сделает LUN доступным для всех систем.
target# stmfadm add-view 600144F0B5418B0000004DDAC7C10001
Если Вам нужно ограничить доступ к LUN view для отдельных систем, ознакомьтесь с How to Restrict LUN Access to Selected Systems.
Проверьте конфигурацию LUN.
target# stmfadm list-view -l 600144F0B5418B0000004DDAC7C10001 View Entry: 0 Host group : All Target group : All LUN : 0
How to Create the iSCSI Target
This procedure assumes that you are logged in to the local system will contains the iSCSI target.
Enable the iSCSI target service.
target# svcadm enable -r svc:/network/iscsi/target:default
Confirm that the service is enabled.
target# svcs -l iscsi/target fmri svc:/network/iscsi/target:default name iscsi target enabled true state online next_state none state_time Mon May 23 14:48:59 2011 logfile /var/svc/log/network-iscsi-target:default.log restarter svc:/system/svc/restarter:default dependency require_any/error svc:/milestone/network (online) dependency require_all/none svc:/system/stmf:default (online)
Create the iSCSI target.
target# itadm create-target Target iqn.1986-03.com.sun:02:73d12edc-9bb9-cb44-efc4-c3b36c039405 successfully created
Display the iSCSI target information.
target# itadm list-target -v TARGET NAME STATE SESSIONS iqn.1986-03.com.sun:02:73d12edc-9bb9-cb44-efc4-c3b36c039405 online 0 alias: - auth: none (defaults) targetchapuser: - targetchapsecret: unset tpg-tags: default
How to Configure an IB HCA for iSER
An InfiniBand (IB) Host Channel Adapter (HCA) is required to take full advantage of the iSCSI Extensions for RDMA (iSER) capabilities. To use iSER, you must configure the HCA on both the target and the initiator.
Become an administrator on the host (initiator) system.
Connect the HCA to an IB switch.
See the vendor documentation for details.
Configure the target and the initiator for the HCA.
The target and the initiator must be on the same subnet. This example uses
ibd0as the driver.# ipadm create-addr ibd0
Configure the IP address and port combination for the HCA.
# ipadm create-addr -T static -a local=10.1.190.141/24 ibd0/v4addr
Verify the interface configuration.
# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 e1000g0/_b dhcp ok 10.1.190.141/24 lo0/v6 static ok ::1/128 e1000g0/_a addrconf ok fe80::214:4fff:fe27:360c/10
Become an administrator on the target system and repeat steps 3-5 for all other HCA hosts on the network.
Verify connectivity on both the target and the initiator.
target# ping initiator-ip initiator# ping target-ip
How to Configure an iSCSI Initiator
Part of the initiator configuration process is to identify the iSCSI target discovery method, which presents an initiator with a list of available targets. You can configure iSCSI targets for static, SendTargets, or iSNS dynamic discovery. Dynamic discovery using the SendTargets option is the optimum configuration for an iSCSI initiator that accesses a large number of targets, such over an iSCSI to Fibre Channel bridge. SendTargets dynamic discovery requires the IP address and port combination of the iSCSI target for the iSCSI initiator to perform the target discovery. The most common discovery method is SendTargets.
When configuring the target discovery method, you must provide the following information, depending on which method you choose:
SendTargets – Target IP address
iSNS – iSNS server address
Static – Target IP address and target name
For more information about configuring target discovery methods, see Configuring Dynamic or Static Target Discovery.
Enable the iSCSI initiator service.
initiator# svcadm enable network/iscsi/initiator
Verify the target's name and IP address while logged in to the server that is providing the target.
target# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 e1000g0/_b dhcp ok 10.80.227.189/24 lo0/v6 static ok ::1/128 e1000g0/_a addrconf ok fe80::214:4fff:fe27:360c/10 target# itadm list-target -v TARGET NAME STATE SESSIONS iqn.1986-03.com.sun:02:73d12edc-9bb9-cb44-efc4-c3b36c039405 online 0 alias: - auth: none (defaults) targetchapuser: - targetchapsecret: unset tpg-tags: defaultConfigure the target to be statically discovered.
initiator# iscsiadm add static-config iqn.1986-03.com.sun:02:73d12edc-9bb9-cb44-efc4-c3b36c039405, 10.80.227.189
Review the static configuration information.
initiator# iscsiadm list static-config Static Configuration Target: iqn.1986-03.com.sun:02:73d12edc-9bb9-cb44-efc4-c3b36c039405, 10.80.227.189:3260
The iSCSI connection is not initiated until the discovery method is enabled. See the next step.
Configure one of the following target discovery methods:
If you have configured a dynamically discovered (SendTargets) target, configure the SendTargets discovery method.
initiator# iscsiadm add discovery-address 10.80.227.189
If you have configured a dynamically discovered (iSNS) target, configure the iSNS discovery method.
initiator# iscsiadm add isns-server 10.80.227.189
Enable one of the following the target discovery methods:
If you have configured a dynamically discovered (SendTargets) target, enable the SendTargets discovery method.
initiator# iscsiadm modify discovery --sendtargets enable
If you have configured a dynamically discovered (iSNS) target, enable the iSNS discovery method.
initiator# iscsiadm modify discovery --iSNS enable
If you have configured static targets, enable the static target discovery method.
initiator# iscsiadm modify discovery --static enable
Reconfigure the
/devnamespace to recognize the iSCSI disk, if necessary.initiator# devfsadm -i iscsi
How to Remove Discovered iSCSI Targets
The associated targets are logged out after you perform any of the following actions:
Remove a discovery address
Remove an iSNS server
Remove a static configuration
Disable a discovery method
If these associated targets are still in use, for example, they have mounted file systems, the logout of these devices will fail, and they will remain on the active target list.
This optional procedure assumes that you are logged in to the local system where access to an iSCSI target device has already been configured.
Become an administrator.
(Optional) Disable an iSCSI target discovery method by using one of the following:
If you need to disable the SendTargets discovery method, use the following command:
initiator# iscsiadm modify discovery --sendtargets disable
If you need to disable the iSNS discovery method, use the following command:
initiator# iscsiadm modify discovery --iSNS disable
If you need to disable the static target discovery method, use the following command:
Note - If you attempt to disable or remove a discovery entry that has an associated logical unit (LUN) in use, the disable or remove operation fails with the following message:
logical unit in use
If this errors occurs, stop all associated I/O on the LUN, unmount the file systems, and so on. Then, repeat the disable or remove operation.
Remove the iSCSI target device.
For example:
target# itadm delete-target target-IQN
This command might error if the target is still online or busy:
The target is online or busy. Use the -f (force) option, or 'stmfadm offline-target iqn.1986-03.com.sun:02:99619b8a-a4dc-4cfb-93f0-ee3debe7b0c8' itadm delete-target failed with error 16
Creating iSCSI Target Portal Groups
You can create a target portal group (TPG) to manage the discovery of multiple iSCSI and iSER targets. A TPG is a list of IP addresses to determine upon which interfaces a specific iSCSI target will listen.
A TPG contains IP addresses and TCP port numbers. To use this capability, you need to do the following:
Create a TPG as a list of ip-address:port specifiers by using the
itadm create-tpgcommand.Bind a specific iSCSI target to a TPG by using the
itadm modify-target-tcommand.When an iSCSI target is made active, an iSCSI listener is created for each IP address and port belonging to a TPG associated with that target.
A TPG is an efficient way to control which targets are discovered through specific ports. For example, you could restrict your iSCSI target so that it is available only through one specific IP address or only through a set of iSER-capable IP addresses.
Note - Do not confuse target portal groups with target groups. A target group is a list of SCSI target ports that are all treated the same when creating views. Creating a view can help you facilitate LUN mapping. Each view entry specifies a target group, as host group, and a LUN. For more information on Target Groups and LUN mapping, see Making SCSI Logical Units Available and stmfadm(1M).
To learn about static and iSNS target discovery, see Configuring Dynamic or Static Target Discovery. The iSCSI initiator uses the iscsiadm command to discover TPGs. For more information, see iscsiadm(1M) and itadm(1M).
Using TPGs with iSER
When you use the SendTargets discovery and iSER at the same time, a common convention is to use a TPG to associate a specific iSCSI target port with only iSER-capable IP addresses. For example, if a target system has four IP addresses, A, B, C, and D, and only addresses B and C are iSER-capable, then addresses B and C could be added to a TPG, and assigned to a target T.
An iSCSI initiator with both Ethernet and InfiniBand (IB) interfaces could use the SendTargets discovery method to discover the possible storage targets. Without the use of TPGs, the initiator might always prefer the use of the Ethernet interfaces over the IB interfaces. By associating target T only with the IB interfaces, the initiator correctly prefers using its IB-capable interface when connecting to target T.
How to Create a Target Portal Group for iSCSI Targets
You can create a target portal group (TPG) by providing a unique name, and a TPG Tag (ranging from 2–65535) is automatically generated. TPG Tag 1 is reserved for the default TPG that is used when you do not explicitly set a TPG on the target. The portal for the default TPG matches requests from all network interfaces on port 3260.
The following steps shows how to create two TPGs, TPGA and TPGB, that use port 8000 for the IP addresses in TPGB.
Become an administrator.
Create two TPGs.
target# itadm create-tpg TPGA 192.168.0.1 192.168.0.2 target# itadm create-tpg TPGB 192.168.0.2:8000 192.168.0.2:8000
Note - IPv4 portals are specified in dotted address notation (for example,
192.168.0.1). IPv6 portal addresses must be enclosed in square brackets.Configure an existing iSCSI target to use the TPGs, TPGA and TPGB.
# itadm modify-target -t TPGA,TPGB eui.20387ab8943ef7548
Verify the TPGs that you created.
# itadm list-tpg -v
You can remove a TPG with the
itadm delete-tpgcommand.
How to Access iSCSI Disks
After the devices have been discovered by the Oracle Solaris iSCSI initiator, the login negotiation occurs automatically. The Oracle Solaris iSCSI driver determines the number of available LUNs and creates the device nodes. Then, the iSCSI devices can be treated as any other SCSI device.
You can create a ZFS storage pool on the LUN and then create a ZFS file system.
You can view the iSCSI disks on the local system by using the format utility.
Review the iSCSI LUN information in the
formatoutput.initiator# format 0. c0t600144F0B5418B0000004DDAC7C10001d0 <SUN-COMSTAR-1.0 cyl 1022 alt 2 hd 128 sec 32> /scsi_vhci/disk@g600144f0b5418b0000004ddac7c10001 1. c8t0d0 <Sun-STK RAID INT-V1.0 cyl 17830 alt 2 hd 255 sec 63> /pci@0,0/pci10de,375@f/pci108e,286@0/disk@0,0 2. c8t1d0 <Sun-STK RAID INT-V1.0-136.61GB> /pci@0,0/pci10de,375@f/pci108e,286@0/disk@1,0 3. c8t2d0 <Sun-STK RAID INT-V1.0-136.61GB> /pci@0,0/pci10de,375@f/pci108e,286@0/disk@2,0 4. c8t3d0 <Sun-STK RAID INT-V1.0 cyl 17830 alt 2 hd 255 sec 63> /pci@0,0/pci10de,375@f/pci108e,286@0/disk@3,0 Specify disk (enter its number): 0 selecting c0t600144F0B5418B0000004DDAC7C10001d0 [disk formatted]In the above output, disk 0 is an iSCSI LUN under MPxIO control. Disks 1-4 are local disks.
You can create a ZFS storage pool and ZFS file systems on the iSCSI LUN.
initiator# zpool create pool-name c0t600144F0B5418B0000004DDAC7C10001d0 initiator# zfs create pool-name/fs-name
The ZFS file system is automatically mounted when created and is remounted at boot time.
Making SCSI Logical Units Available
Simply registering a logical unit (LUN) with the STMF framework does not make it available to hosts (initiators) on the network. This section describes how to make LUNs visible to initiator hosts for the following configurations.
For iSCSI, Fibre Channel, and FCoE configurations, a LUN must be mapped before it can be accessed. You can choose one of the following methods, both of which use the stmfadm command:
Simple mapping – Exposes the LUN to all initiators through all the ports, using one command. Making LUNs available to all hosts uses this method.
Selective mapping– Enables you to specify the hosts that can access the LUN. Making LUNs available to selected hosts uses this method. This process includes the following steps:
Defining host groups – A host group is a name given to a set of hosts (initiators) that are allowed to access the same LUNs. This step is not needed if the same set of LUNs is visible to all the hosts, as in simple mapping.
Defining target groups – A target group is a name given to a set of target ports that export the same set of LUNs to the same set of host groups. This step is not needed if the same set of LUNs is visible to all the hosts, as in simple mapping.
Adding one or more views for each logical unit – Adding a view creates a bridge between the LUN and the host initiator. When an initiator from the host group logs in to a target port contained in the target group, the LUN is visible.
Note - Don't confuse a target group with a target portal group (TPG). A TPG is a list of IP addresses that an iSCSI target listens to. A TPG can help you restrict an iSCSI target so that it is available only through one specific IP address. For more information on target groups, see stmfadm(1M).
A view entry consists of four components: host group, target group, logical unit (LUN), and LUN identifier. Of these four components, only the LUN identifier is required. If the other components are omitted, the following default values are assumed:
If the host group is omitted, the all initiators value is assumed.
If the target group is omitted, the all targets value is assumed.
If the LUN is omitted, the system chooses a suitable LUN for the entry.
How to Make a Logical Unit Available to All Systems
This procedure makes a LUN available to all initiator hosts on a storage network.
Obtain the Global Unique Identification (GUID) number for the LUN.
# stmfadm list-lu -v
Add a view for the logical unit.
3 # stmfadm add-view GUID-number
How to Restrict LUN Access to Selected Systems
Use this procedure to restrict LUNs to selected hosts on a storage network. If you are using Fibre Channel ports, first identify the World Wide Names (WWN). Then, selectively map a logical unit number (LUN) to the ports on host-a, for example. A target group (targets-0) is also defined for a given set of target ports that export the same set of LUNs to the same host group.
For information about configuring a target group, see stmfadm(1M).
Become an administrator.
Identify the Fibre Channel (FC) port on the initiator.
initiator# fcinfo hba-port HBA Port WWN: 210000e08b195dae Port Mode: Initiator Port ID: 0 OS Device Name: /dev/cfg/c8 Manufacturer: QLogic Corp. Model: 375-3108-xx Firmware Version: 03.03.28 FCode/BIOS Version: fcode: 1.13; Serial Number: not available Driver Name: qlc Driver Version: 20100408-3.01 Type: unknown State: offline Supported Speeds: 1Gb 2Gb Current Speed: not established Node WWN: 200000e08b195dae NPIV Not Supported . . .Create a host group.
target# stmfadm create-hg host-a 210000e08b195dae 210100e08b395dae
Add the WWNs identified in the preceding output as members of the host group.
target# stmfadm add-hg-member -g host-a
Create a target group.
target# stmfadm create-tg targets-0
Specify the target group members by adding the target names.
Each SCSI target can be a member of only one target group.
target# stmfadm add-tg-member -g targets-0 wwn.guid-number
Identify the GUID number for the LUN.
target# stmfadm list-lu -v
Make the LUN available by adding a view entry, specifying the host group name and the LUN GUID number.
target# stmfadm add-view -h host-a -t targets-0 -n 1 guid-number