iSCSI Service and Client configuration (Redhat Liunx 7.0)

Providing iSCSI remote block storage services

iSCSI Block Storage Concepts

The Internet Small computer System Interface (iSCSI) is based on the TCP/IP protocol, simulating high-performance local storage buses, and reading and managing Remote Storage devices over IP networks. As a SAM protocol, iSCSI can provide storage services to Lan,wan.

At present, the highest transmission speed of Ethernet is up to 10-40g/s, which is comparable to the FC-connected San, and the future Ethernet speed can be up to 100g/s

Concept:

Initiator

iSCSI clients, connecting and using iSCSI remote fast devices, must be assigned a unique name (IQN)

Target

iSCSI storage resources on the iSCSI server side must have a unique name. A target can provide one or more fast devices, which are called LUNs. An iSCSI server can provide multiple target

Acl

Access to Target's control list, which can be verified by IP or password restrictions

Discovery

A list of target resources listed on the iSCSI server is initiated by initiator.

IQN

iSCSI specification naming, can be set to target or initiator

Iqn.yyyy-mm.com.xxx.domain[:optional_string]

Login

Initiator login found the target that was visited by the professor, after logging in, the remote target is recognized as a local block device, generally sd*

sd*

LUNs

The logical unit number is the number of the block device in target to distinguish the block device

Node

node, which can be a initiator or target

Portal

On a initiator or Tarhet node, a combination of IP and port is used to establish a connection between the initiator and target, which can be understood as an IP and port entry that accesses a target

Tpg

The IP address and port collection used by target portal group to listen to target. You can usually set a target to TPG to achieve the target's portal configuration

Configuration of an iSCSI service

1 Installing the relevant RPM package

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2. Start the target service and set up the firewall

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3. Partitioning the/dev/sdb

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4. Change partitions to physical volumes, set up volume groups and logical volumes

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5. Use TARGETCLI to enter the interactive interface

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6. Enter iSCSI to create a target service

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7. Create a portals (equivalent to a network entry)

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8. Create a block name, bind the corresponding disk

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9. Create a LUN (the logical unit number is to number the block device in target to distinguish the block device)

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10. Create an ACL that allows only one client to access

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11. Turn Off Password Authentication

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12. Turn off ACLs on TPG1

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13. Complete configuration of the results

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Configuration of two iSCSI clients

1. Install the RPM package

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2. Edit/ETC/ISCSI/INITATORNAME.ISCSI

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3. Start related services, connect the server and log on to the server

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4. View disk Information

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5. Partition the/DEV/SDC (this is a device from the server)

6. Create a table of contents and format/DEV/SDC1

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7./DEC/SDC1 Permanent mount (edit/etc/fstab)

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8. Final Mount

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iSCSI Service and Client configuration (Redhat Liunx 7.0)