Differences

This shows you the differences between two versions of the page.

--- storage:iscsi [2017/08/30 13:33]
frank
+++ storage:iscsi [2018/05/03 17:03] (current)
frank
@@ Line 1: / Line 1: @@
+==== iSCSI client ====
+=== install iscsi-initiator-utils ===
+  # yum install iscsi-initiator-utils
+=== iscsiadm command ===
 <code>
 list
@@ Line 5: / Line 9: @@
 logout all
 # iscsiadm -m node -U all
+session
+# iscsiadm -m session
+# iscsiadm -m session -P 3
+discover
+# iscsiadm -m discovery -t st -p <IP>
+.196.241.255:3260,1 iqn.2015-02.oracle.boot:uefi
+login
+# iscsiadm -m node -T iqn.2015-02.oracle.boot:uefi -l
+Logging in to [iface: default, target: iqn.2015-02.oracle.boot:uefi, portal: 10.196.241.255,3260] (multiple)
+Login to [iface: default, target: iqn.2015-02.oracle.boot:uefi, portal: 10.196.241.255,3260] successful.
+list iSCSI disks
+# lsblk
+Turn on SCSI/iSCSI error handling lgos
+echo -n 1 > /sys/module/libiscsi/parameters/debug_libiscsi_eh
+echo -n 0xff > /sys/module/scsi_mod/parameters/scsi_logging_level
+Or
+scsi_logging_level -s --error 7 --timeout 7 --all 0
+</code>
+==== targetcli ====
+http://linux-iscsi.org/wiki/Targetcli
+https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch24
+=== installation ===
+  * RHEL7/CentOS7
+<code>
+yum install targetcli
+systemctl status target
+systemctl enable target
+targetcli
+/> ls
+o- / ......................................................................................................................... [...]
+  o- backstores .............................................................................................................. [...]
+  | o- block .................................................................................................. [Storage Objects: 0]
+  | o- fileio ................................................................................................. [Storage Objects: 0]
+  | o- pscsi .................................................................................................. [Storage Objects: 0]
+  | o- ramdisk ................................................................................................ [Storage Objects: 0]
+  o- iscsi ............................................................................................................ [Targets: 0]
+  o- loopback ......................................................................................................... [Targets: 0]
+</code>
+=== Create backstores ===
+<code>
+FILEIO (Linux file-backed storage)  write_back and write_thru
+/> /backstores/fileio create file1 /home/tgt/disk1.img 100G write_back=false
+Created fileio file1 with size 107374182400
+/> ls /backstores/fileio/
+o- fileio ..................................................................................................... [Storage Objects: 1]
+  o- file1 ................................................................. [/home/tgt/disk1.img (100.0GiB) write-thru deactivated]
+    o- alua ....................................................................................................... [ALUA Groups: 1]
+      o- default_tg_pt_gp ........................................................................... [ALUA state: Active/optimized]
+BLOCK (Linux BLOCK devices)
+/> /backstores/block create name=block1 dev=/dev/sdb
+Generating a wwn serial.
+Created block storage object block_backend using /dev/sdb.
+PSCSI(Linux pass-through SCSI devices)
+RAMDISK(Linux RAMDISK_MCP)
+</code>
+=== Configure target ===
+<code>
+/> iscsi/
+/iscsi> create iqn.2015-02.oracle.boot:uefi
+Created target iqn.2015-02.oracle.boot:uefi.
+Created TPG 1.
+Global pref auto_add_default_portal=true
+Created default portal listening on all IPs (0.0.0.0), port 3260.
+/iscsi> ls
+o- iscsi .............................................................................................................. [Targets: 1]
+  o- iqn.2015-02.oracle.boot:uefi ........................................................................................ [TPGs: 1]
+    o- tpg1 ................................................................................................. [no-gen-acls, no-auth]
+      o- acls ............................................................................................................ [ACLs: 0]
+      o- luns ............................................................................................................ [LUNs: 0]
+      o- portals ...................................................................................................... [Portals: 1]
+        o- 0.0.0.0:3260 ....................................................................................................... [OK]
+</code>
+=== configure iSCSI portal ===
+<code>
+# create a portal
+/iscsi>
+/> /iscsi/iqn.2015-02.oracle.boot:uefi/tpg1/portals
+/iscsi/iqn.20../tpg1/portals> create
+# delete a portal
+/iscsi/iqn.20.../tpg1/portals/delete ip_address=0.0.0.0 ip_port=3260
+</code>
+=== configure LUNs ===
+<code>
+/> iscsi/iqn.2015-02.oracle.boot:uefi/tpg1/luns/
+/iscsi/iqn.20...efi/tpg1/luns> create /backstores/fileio/file1
+Created LUN 0.
+</code>
+=== Create ACL ===
+<code>
+/> /iscsi/iqn.2015-02.oracle.boot:uefi/tpg1/acls
+/iscsi/iqn.20...efi/tpg1/acls> create iqn.2015-02.oracle.boot:instance
+Created Node ACL for iqn.2015-02.oracle.boot:instance
+Created mapped LUN 0.
+Created mapped LUN 1.
 </code>

Tech Wiki

User Tools

Site Tools

Differences

Page Tools