iSCSI Disk Services for Linux

I. Introduction to iSCSI

ISCSI (Internet SCSI) supports sending SCSI commands to SCSI storage devices (targets) on remote servers from the client (initiator) via IP. The iSCSI qualified name is used to determine the initiator and target, and to use IQN.YYYY.MM. {Reverse Domain}:label format.}

By default, network traffic is clear text to the 3260/TCP on the iSCSI target.

·· iSCSI Initiator: Clients that need access to raw SAN storage

·· iSCSI Target: A remote hard disk that is provided from an iSCSI server, or a "target portal"

·· iSCSI Target Portal: The server that provides the target to the initiator through the network

·· IQN: "iSCSI qualified name". Each initiator and target requires a unique name to identify, and the best practice is to use a name that may be unique on the Internet.

Two. Setting up iSCSI shared devices

Service side:

1. Server modification hostname hostnamectl set-hostname iscsi-server.example.com

Set IP address to 172.25.254.128, turn off firewall

2. Add a new 5GB hard disk/DEV/VDB1 on the server and synchronize the partition list

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3: Install the iSCSI target Interactive Configuration service TARGETCLI

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4. Start the TARGETCLI service

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5.targetcli entering iSCSI target Interactive configuration mode

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6.exit Complete service-side configuration

Client:

1. Client modifies hostname hostnamectl Set-hostname iscsi-client.example.com
Set IP address to 172.25.254.228, turn off firewall

2. Installing the iSCSI Client

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3. Set the initiator iqn VIM/ETC/ISCSI/INITIATORNAME.ISCSI

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4. Restart the iSCSI service

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5. Partitioning

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6. Format and Mount

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7. Remove iSCSI Shared devices

Client:

umount/mnt/

Iscsiadm-m node-t iqn.2017-06.com.example:storeage1-p 172.25.254.128-u

Log out of iSCSI targets and temporarily disconnect

Iscsiadm-m node-t iqn.2017-06.com.example:storeage1-p 172.25.254.128-o Delete

Delete local records for iSCSI targets to permanently disconnect

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Service side:

Targetcli

Clearconfig Confirm=true Clear All configuration information for iSCSI

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Three. Setting up iSCSI LVM shared devices

1. Build the previous/DEV/VDB1 partition into the VG partition ISCSIVG

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2. Create all ISCSIVG into Lv0

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3.targetcli entering iSCSI target Interactive configuration mode

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Log on to an iSCSI target on the server

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To see the new device/DEV/SDA

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Add a new 1GB hard disk/DEV/VDB2 on the server side to modify the partition to LVM

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Synchronizing a partition list

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Increase the VG of 1GB and increase the LV to 5500M

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Cancel an iSCSI target on the add server

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View new device/DEV/SDA size increased to 5757M

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iSCSI Disk Services for Linux