linux_wiki:configure_a_system_as_either_an_iscsi_target_or_initiator_that_persistently_mounts_an_iscsi_target

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linux_wiki:configure_a_system_as_either_an_iscsi_target_or_initiator_that_persistently_mounts_an_iscsi_target [2018/04/04 23:44]
billdozor [Create Back-end Storage] 		linux_wiki:configure_a_system_as_either_an_iscsi_target_or_initiator_that_persistently_mounts_an_iscsi_target [2018/05/30 21:46]
billdozor [Configure the iSCSI Target]
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 ---- ----
 +
 +====== Help ======
 +
 +Finding help in this section.
 +  * iSCSI target (server)<code bash>#tab completion in targetcli utility</code>
 +  * iSCSI initiator (client)<code bash>man iscsiadm</code>
 +
 +----
 +
  
 ====== iSCSI Targets (Storage Server) ====== ====== iSCSI Targets (Storage Server) ======
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 \\ \\
-Create a block storage object within the targetcli interactive prompt+**Backing Storage:** Create a block storage object within the targetcli interactive prompt
 <code bash> <code bash>
-/> backstores/block create block1 /dev/vgsan/lvstor01+/> backstores/block create name=block1 dev=/dev/vgsan/lvstor01
 </code> </code>
   * backstores/block -> In the backstores block path   * backstores/block -> In the backstores block path
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 \\ \\
-Create an iSCSI Target IQN (Iscsi Qualified Name)+**iSCSI Target**: Create an iSCSI Target IQN (Iscsi Qualified Name)
 <code bash> <code bash>
-/>iscsi/ create iqn.2016-08.com.example.server2:target+/> iscsi/ create wwn=iqn.2018-05.com.example.server2:target
 </code> </code>
   * iscsi/ -> In the iscsi path   * iscsi/ -> In the iscsi path
-  * create iqn.2016-08.com.example.server2:target -> Create the IQN named "iqn.2016-08.com.example.server2:target"+  * create iqn.2018-05.com.example.server2:target -> Create the IQN named "iqn.2018-05.com.example.server2:target"
   * An IQN is how you refer to the target disk   * An IQN is how you refer to the target disk
     * All IQNs must start with "iqn"     * All IQNs must start with "iqn"
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 Change into the newly created IQN's TPG (Target Portal Group) and view the contents Change into the newly created IQN's TPG (Target Portal Group) and view the contents
 <code bash> <code bash>
-cd iqn.2016-08.com.example.server2:target/tpg1 +/> cd iscsi/iqn.2018-05.com.example.server2:target/tpg1/ 
-ls+/iscsi/iqn.20...2:target/tpg1> ls
 </code> </code>
   * Objects listed:   * Objects listed:
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     * luns (logical unit number or the exported resource)     * luns (logical unit number or the exported resource)
     * portals (IP addresses:ports to reach the exported resource)     * portals (IP addresses:ports to reach the exported resource)
 +      * **Note:** In some earlier versions (RHEL 7.0-7.1), a portal is NOT automatically created. This may need to be created manually.
  
 \\ \\
-Create a LUN within the target portal group+**Create portal: RHEL 7.0 - 7.1 only**
 <code bash> <code bash>
-/>luns/ create /backstores/block/block1+/iscsi/iqn.20...2:target/tpg1> portals create 0.0.0.0 ip_port=3260 
 +</code> 
 + 
 +\\ 
 +**LUN to Storage Map:** Create a LUN within the target portal group 
 +<code bash> 
 +/iscsi/iqn.20...2:target/tpg1> luns/ create /backstores/block/block1
 </code> </code>
   * luns/ -> In the luns path   * luns/ -> In the luns path
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 \\ \\
-Create an ACL for a client to be able to connect to the IQN in the future+**Client ACL:** Create an ACL for a client to be able to connect to the IQN in the future
 <code bash> <code bash>
-/>acls/ create iqn.2016-08.com.example:server1+/iscsi/iqn.20...2:target/tpg1> acls/ create iqn.2018-05.com.example:server1
 </code> </code>
   * acls/ -> In the acls path   * acls/ -> In the acls path
-  * create iqn.2016-08.com.example:server1 -> Create an ACL allowing this IQN+  * create iqn.2018-05.com.example:server1 -> Create an ACL allowing this IQN
     * This is a combination of a new IQN (following a similar naming convention) and an identifier of your choosing. Together, this makes up the **client iscsi initiator name** that will be used.     * This is a combination of a new IQN (following a similar naming convention) and an identifier of your choosing. Together, this makes up the **client iscsi initiator name** that will be used.
-    * iqn.2016-08.com.example -> IQN+    * iqn.2018-05.com.example -> IQN
     * :server1 -> an identifier of your choosing     * :server1 -> an identifier of your choosing
   * **Alternatively:** Instead of making of an IQN for the client, [[#configure_initiator_and_iscsid|see here to retrieve it]].   * **Alternatively:** Instead of making of an IQN for the client, [[#configure_initiator_and_iscsid|see here to retrieve it]].
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 **OPTIONAL**: Create a CHAP Username/Password for client connections **OPTIONAL**: Create a CHAP Username/Password for client connections
 <code bash> <code bash>
-/>cd acls/iqn.2016-08.com.example:server1/ +/iscsi/iqn.20...2:target/tpg1> cd acls/iqn.2018-05.com.example:server1/ 
-/>set auth userid=myuser +/iscsi/iqn.20...ample:server1> set auth userid=myuser password=mypassword
-/>set auth password=mypassword+
 </code> </code>
  
 \\ \\
 Save and exit the targetcli utility Save and exit the targetcli utility
-<code bash> +<code bash>/iscsi/iqn.20...ample:server1> cd / 
-/>saveconfig +/> saveconfig 
-/>exit+/> exit
 </code> </code>
  
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 vim /etc/iscsi/initiatorname.iscsi vim /etc/iscsi/initiatorname.iscsi
  
-InitiatorName=iqn.2016-08.com.example:server1+InitiatorName=iqn.2018-05.com.example:server1
 </code> </code>
   * Identifying client information needed to mount the disk   * Identifying client information needed to mount the disk
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 Enable and start the iscsi service Enable and start the iscsi service
 <code bash> <code bash>
-systemctl enable iscsid +systemctl enable iscsi 
-systemctl start iscsid+systemctl start iscsi
 </code> </code>
  
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 \\ \\
-Login to the Target IQN+Login to the Target IQN (found during discovery)
 <code bash> <code bash>
-iscsiadm --mode node --target iqn.2016-08.com.example.server2:target --portal 192.168.1.151 --login+iscsiadm --mode node --target iqn.2018-05.com.example.server2:target --portal 192.168.1.151 --login
 </code> </code>
   * Default port is 3260 if not specified   * Default port is 3260 if not specified
  • linux_wiki/configure_a_system_as_either_an_iscsi_target_or_initiator_that_persistently_mounts_an_iscsi_target.txt
  • Last modified: 2019/05/25 23:50
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