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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 23:41] billdozor [View iSCSI Disk Information] |
linux_wiki:configure_a_system_as_either_an_iscsi_target_or_initiator_that_persistently_mounts_an_iscsi_target [2019/05/25 23:50] (current) |
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| * server1.example.com (192.168.1.150) -> Client/ | * server1.example.com (192.168.1.150) -> Client/ | ||
| * server2.example.com (192.168.1.151) -> Server/ | * server2.example.com (192.168.1.151) -> Server/ | ||
| - | * **Add Disk**: Add a secondary disk to the Server/ | + | * **Add Disk**: Add a secondary disk to the Server/ |
| ---- | ---- | ||
| + | |||
| + | ====== Help ====== | ||
| + | |||
| + | Finding help in this section. | ||
| + | * iSCSI target (server)< | ||
| + | * iSCSI initiator (client)< | ||
| + | |||
| + | ---- | ||
| + | |||
| ====== iSCSI Targets (Storage Server) ====== | ====== iSCSI Targets (Storage Server) ====== | ||
| Line 27: | Line 36: | ||
| pvcreate /dev/sdb1 | pvcreate /dev/sdb1 | ||
| vgcreate vgsan /dev/sdb1 | vgcreate vgsan /dev/sdb1 | ||
| - | lvcreate --size 500M --name lvstor01 vgsan | + | lvcreate --extents 100%PVS |
| </ | </ | ||
| Line 67: | Line 76: | ||
| \\ | \\ | ||
| - | Create a block storage object within the targetcli interactive prompt | + | **Backing Storage: |
| <code bash> | <code bash> | ||
| - | /> backstores/ | + | /> backstores/ |
| </ | </ | ||
| * backstores/ | * backstores/ | ||
| Line 76: | Line 85: | ||
| \\ | \\ | ||
| - | Create an iSCSI Target IQN (Iscsi Qualified Name) | + | **iSCSI Target**: |
| <code bash> | <code bash> | ||
| - | />iscsi/ create iqn.2016-08.com.example.server2: | + | /> iscsi/ create |
| </ | </ | ||
| * iscsi/ -> In the iscsi path | * iscsi/ -> In the iscsi path | ||
| - | * create iqn.2016-08.com.example.server2: | + | * create iqn.2018-05.com.example.server2: |
| * 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 " | * All IQNs must start with " | ||
| Line 91: | Line 100: | ||
| 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: | + | /> cd iscsi/iqn.2018-05.com.example.server2: |
| - | ls | + | / |
| </ | </ | ||
| * Objects listed: | * Objects listed: | ||
| Line 98: | Line 107: | ||
| * luns (logical unit number or the exported resource) | * luns (logical unit number or the exported resource) | ||
| * portals (IP addresses: | * portals (IP addresses: | ||
| + | * **Note:** In some earlier versions (RHEL 7.0-7.1), a portal is NOT automatically created. This may need to be created manually. | ||
| \\ | \\ | ||
| - | Create | + | **Create portal: RHEL 7.0 - 7.1 only** |
| <code bash> | <code bash> | ||
| - | />luns/ create / | + | /iscsi/ |
| + | </ | ||
| + | |||
| + | \\ | ||
| + | **LUN to Storage Map:** Create a LUN within the target portal group | ||
| + | <code bash> | ||
| + | / | ||
| </ | </ | ||
| * luns/ -> In the luns path | * luns/ -> In the luns path | ||
| Line 108: | Line 124: | ||
| \\ | \\ | ||
| - | Create an ACL for a client to be able to connect to the IQN in the future | + | **Client ACL: |
| <code bash> | <code bash> | ||
| - | />acls/ create iqn.2016-08.com.example: | + | /iscsi/ |
| </ | </ | ||
| * acls/ -> In the acls path | * acls/ -> In the acls path | ||
| - | * create iqn.2016-08.com.example: | + | * create iqn.2018-05.com.example: |
| * 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: | * **Alternatively: | ||
| Line 122: | Line 138: | ||
| **OPTIONAL**: | **OPTIONAL**: | ||
| <code bash> | <code bash> | ||
| - | />cd acls/iqn.2016-08.com.example: | + | /iscsi/ |
| - | />set auth userid=myuser | + | /iscsi/ |
| - | />set auth password=mypassword | + | |
| </ | </ | ||
| \\ | \\ | ||
| Save and exit the targetcli utility | Save and exit the targetcli utility | ||
| - | <code bash> | + | <code bash>/ |
| - | /> | + | /> saveconfig |
| - | />exit | + | /> exit |
| </ | </ | ||
| Line 146: | Line 161: | ||
| firewall-cmd --reload | firewall-cmd --reload | ||
| </ | </ | ||
| - | * iscsi-target service available as of RHEL 7.2 | + | * iscsi-target service available as of **RHEL 7.2** |
| \\ | \\ | ||
| Line 173: | Line 188: | ||
| vim / | vim / | ||
| - | InitiatorName=iqn.2016-08.com.example: | + | InitiatorName=iqn.2018-05.com.example: |
| </ | </ | ||
| * Identifying client information needed to mount the disk | * Identifying client information needed to mount the disk | ||
| Line 191: | Line 206: | ||
| Enable and start the iscsi service | Enable and start the iscsi service | ||
| <code bash> | <code bash> | ||
| - | systemctl enable | + | systemctl enable |
| - | systemctl start iscsid | + | systemctl start iscsi |
| </ | </ | ||
| Line 209: | Line 224: | ||
| \\ | \\ | ||
| - | 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: | + | iscsiadm --mode node --target iqn.2018-05.com.example.server2: |
| </ | </ | ||
| * Default port is 3260 if not specified | * Default port is 3260 if not specified | ||