Latest revision as of 09:10, 26 April 2024

Links

Terminology

multipath

Implementations

Features comparison between Linux SCSI targets

IET

iSCSI Enterprise Target

ietd
ietadm
iscsitarget
iscsid

LIO

targetcli

SCST

iSCSI Target Driver

scst

STGT

Predecessor of LIO

ISTGT

iSCSI Target

FreeBSD/Linux

istgtcontrol and friends

Comstar

Commands:

itadm
stmfadm

TGT

Linux iSCSI Target

tgtd
tgdadm

open-iscsi

iscsiadm?

FreeBSD

FreeBSD native iscsi target

iscsid
iscsictl

And there's tgt

FAQ

On ISCSI client

Find targets

iscsi_discovery 192.168.100.32

Please logout from all targets on 192.168.178.3:3260 before trying to run discovery on that portal

??

List connected targets

iscsiadm -m session -P 3

which seems to list only one, for multiple:

tgtadm --lld iscsi --op show --mode conn --tid 1

but that needs more work

List targets

iscsiadm -m discovery -t sendtargets -p 192.168.100.32

Connect to target

iscsiadm -m node --targetname="iqn.2018-5.mynet:drbd0" --portal "192.168.100.32" --login

if you get things like "iscsiadm: No records found" try a thing like

iscsiadm --mode node -l all

iscsiadm: Could not log into all portals:

Disconnect from target

iscsiadm -m node -T iqn.2018-5.mynet:drbd0 -p 192.168.100.32 -u

Show session id

iscsiadm -m session -P 1

Rescan ??

iscsiadm -m node --targetname="foo.bar" -R

Disconnect all targets

iscsiadm --mode node -u all

Rescan session

iscsiadm -m session -r SID --rescan⁠

iscsiadm: Could not log into all portals

??

On server

list targets

tgtadm --lld iscsi --mode target --op show

list connected targets

To list all connections to target with id 1:

tgtadm --lld iscsi --mode conn --op show --tid 1

And disconnect target:

tgtadm --lld iscsi --op delete --mode conn --tid 1 --sid 2 --cid 0

Create iscsi target and Lun

tgtadm --lld iscsi --mode target --op new --tid=1 --targetname iqn.2009-02.com.example:for.all
tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b /var/tmp/iscsi-disk1

Delete iscsi target and Lun

tgtadm --lld iscsi --mode logicalunit --op delete --tid 1 --lun 1
tgtadm --lld iscsi --mode target --op delete --tid=1

Reload tgtd configuration

tgt-admin --update ALL

or

tgt-admin --update your.irqn.string

Show tgdt config

tgt-admin --dump

Grow/resize target

After resizing the target (lvresize or whatever)

tgt-admin --update tid=xx -v -f

Show targets

tgt-admin -s

Show target config

This includes target parameters

tgtadm --lld iscsi -o show -m target --tid=1

The disk contains an unclean file system (0, 0).

Metadata kept in Windows cache, refused to mount.
Falling back to read-only mount because the NTFS partition is in an
unsafe state. Please resume and shutdown Windows fully (no hibernation
or fast restarting.)

ntfsfix /dev/sdc1

On ESXi

Mounting iscsi datastore

How to mount an iSCSI datastore in ESXI CLI

esxcfg-volume -l

esxcfg-volume -m

List connected targets

esxcli iscsi session list

Do the iSCSI Discovery for the iSCSI Host Bus Adapter.

esxcli iscsi adapter discovery rediscover --adapter vmhba64

List targets

esxcli iscsi adapter target list

Some commands

esxcli storage core path list
esxcli storage core adapter rescan --adapter=vmhba64

esxcli iscsi adapter param get -A vmhba64
esxcli iscsi adapter list

Error messages

connection1:0: detected conn error (1020)

These messages are seen when an iSCSI connection times out (1011 means timeout on initiator side and 1020 means the target dropped the connection)

tgtadm: failed to send request hdr to tgt daemon, Transport endpoint is not connected

tgtd not running :)

tgtd: iser_ib_init(3436) Failed to initialize RDMA; load kernel modules?

comment out default-driver

iscsiadm: No portals found

ACL issue, try something like

tgtadm --lld iscsi --op bind --mode target --tid 6 -I ALL

iscsiadm: No records found

Try

iscsiadm -m discovery -t sendtargets -p <ip-address>

@@ Line 1: / Line 1: @@
-=Links=
+= Links =
-*http://nil.uniza.sk/linux-howto/linux-mint-mouting-freenas-iscsi-disk
-*[http://fibrevillage.com/storage/205-iscsiadm-command-examples-on-linux iscsiadm command examples]
+*[http://nil.uniza.sk/linux-howto/linux-mint-mouting-freenas-iscsi-disk http://nil.uniza.sk/linux-howto/linux-mint-mouting-freenas-iscsi-disk]
-*[https://fedoraproject.org/wiki/Scsi-target-utils_Quickstart_Guide Scsi-target-utils Quickstart Guide]
+*[http://fibrevillage.com/storage/205-iscsiadm-command-examples-on-linux iscsiadm command examples]
-*[https://blog.delouw.ch/2013/07/07/creating-and-managing-iscsi-targets/ Creating and managing iSCSI targets]
+*[https://fedoraproject.org/wiki/Scsi-target-utils_Quickstart_Guide Scsi-target-utils Quickstart Guide]
-*https://wiki.archlinux.org/index.php/TGT_iSCSI_Target
+*[https://blog.delouw.ch/2013/07/07/creating-and-managing-iscsi-targets/ Creating and managing iSCSI targets]
-*[https://pubs.vmware.com/vsphere-50/topic/com.vmware.vcli.examples.doc_50/cli_manage_iscsi_storage.7.5.html iSCSI on ESXCLI]
+*[https://wiki.archlinux.org/index.php/TGT_iSCSI_Target https://wiki.archlinux.org/index.php/TGT_iSCSI_Target]
-*https://wiki.archlinux.org/index.php/ISCSI/tgt
+*[https://pubs.vmware.com/vsphere-50/topic/com.vmware.vcli.examples.doc_50/cli_manage_iscsi_storage.7.5.html iSCSI on ESXCLI]
+*[https://wiki.archlinux.org/index.php/ISCSI/tgt https://wiki.archlinux.org/index.php/ISCSI/tgt]
+*[https://ask.openstack.org/en/question/30299/how-to-resize-an-instance-residing-on-a-block-storage-volume/ https://ask.openstack.org/en/question/30299/how-to-resize-an-instance-residing-on-a-block-storage-volume/]
+*[http://linux-iscsi.org/wiki/Targetcli targetcli]
+*https://www.truenas.com/community/resources/why-iscsi-often-requires-more-resources-for-the-same-result.41/
+*[https://linuxhint.com/share-zfs-volumes-via-iscsi/ Share ZFS volumes via iscsi]
+=Terminology=
+==multipath==
+=Implementations=
+[https://scst.sourceforge.net/comparison.html Features comparison between Linux SCSI targets]
+==IET==
+iSCSI Enterprise Target
+*ietd
+*ietadm
+*iscsitarget
+*iscsid
+==LIO==
+*targetcli
+==SCST==
+iSCSI Target Driver
+*scst
+==STGT==
+Predecessor of LIO
+==ISTGT==
+iSCSI Target
+FreeBSD/Linux
+*istgtcontrol and friends
+==Comstar==
+Commands:
+*itadm
+*stmfadm
+==TGT==
+Linux iSCSI Target
+*tgtd
+*tgdadm
+==open-iscsi==
+*iscsiadm?
+==FreeBSD==
+[https://wiki.freebsd.org/Native%20iSCSI%20target FreeBSD native iscsi target]
+*iscsid
+*iscsictl
+And there's [https://wiki.alpinelinux.org/wiki/Linux_iSCSI_Target_(tgt) tgt]
 =FAQ=
-==ISCSI client==
+== On ISCSI client ==
+=== Find targets ===
   iscsi_discovery 192.168.100.32
+Please logout from all targets on 192.168.178.3:3260 before trying to run discovery on that portal
+??
+=== List connected targets ===
+ iscsiadm -m session -P 3
-===List connected targets===
- iscsiadm -m session
 which seems to list only one, for multiple:
   tgtadm --lld iscsi --op show --mode conn --tid 1
 but that needs more work
-===List targets===
+=== List targets ===
   iscsiadm -m discovery -t sendtargets -p 192.168.100.32
-===Connect to target===
+=== Connect to target ===
   iscsiadm -m node --targetname="iqn.2018-5.mynet:drbd0" --portal "192.168.100.32" --login
 if you get things like "iscsiadm: No records found" try a thing like
   iscsiadm --mode node -l all
-===Disconnect from target===
+iscsiadm: Could not log into all portals:
+=== Disconnect from target ===
   iscsiadm -m node -T iqn.2018-5.mynet:drbd0 -p 192.168.100.32 -u
+&nbsp;
+=== Show session id ===
+ iscsiadm -m session -P 1
+&nbsp;
+=== Rescan&nbsp;?? ===
-===Show new size of target===
   iscsiadm -m node --targetname="foo.bar" -R
-===Disconnect all targets===
+=== Disconnect all targets ===
   iscsiadm --mode node -u all
+=== Rescan session ===
+ iscsiadm -m session -r SID --rescan⁠
+===iscsiadm: Could not log into all portals===
+??
+== On server ==
-==On server==
+=== list targets ===
-===list targets===
   tgtadm --lld iscsi --mode target --op show
-===list connected targets===
+=== list connected targets ===
+To list all connections to target with id 1:
   tgtadm --lld iscsi --mode conn --op show --tid 1
 And disconnect target:
   tgtadm --lld iscsi --op delete --mode conn --tid 1 --sid 2 --cid 0
-===Reload tgtd===
+=== Create iscsi target and Lun ===
+ tgtadm --lld iscsi --mode target --op new --tid=1 --targetname iqn.2009-02.com.example:for.all
+ tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b /var/tmp/iscsi-disk1
+=== Delete iscsi target and Lun ===
+ tgtadm --lld iscsi --mode logicalunit --op delete --tid 1 --lun 1
+ tgtadm --lld iscsi --mode target --op delete --tid=1
+=== Reload tgtd configuration ===
   tgt-admin --update ALL
-===Show tgdt config===
+or
+  tgt-admin --update your.irqn.string
+=== Show tgdt config ===
   tgt-admin --dump
+=== Grow/resize target ===
+After resizing the target (lvresize or whatever)
+ tgt-admin --update tid=xx -v -f
+==Show targets==
+ tgt-admin -s
+===Show target config===
+This includes target parameters
+ tgtadm --lld iscsi -o show -m target --tid=1
-==The disk contains an unclean file system (0, 0).==
+===The disk contains an unclean file system (0, 0).===
 <pre>
 Metadata kept in Windows cache, refused to mount.
@@ Line 72: / Line 207: @@
 ==On ESXi==
+*[https://developer.vmware.com/docs/6676/esxcli_iscsi.html esxcli iscsi]
+*[https://www.server-world.info/en/note?os=ESXi_7&p=storage&f=4 Use iSCSI storage on esxi]
+===Mounting iscsi datastore===
+*[https://sion-it.co.uk/tech/how-to-mount-an-iscsi-datastore-in-esxi-cli/ How to mount an iSCSI datastore in ESXI CLI]
+ esxcfg-volume -l
+ esxcfg-volume -m
+===List connected targets===
+ esxcli iscsi session list
+===Do the iSCSI Discovery for the iSCSI Host Bus Adapter.===
+ esxcli iscsi adapter discovery rediscover --adapter vmhba64
+===List targets===
+ esxcli iscsi adapter target list
+===Some commands===
   esxcli storage core path list
-  storage core adapter rescan --adapter=vmhba
+  esxcli storage core adapter rescan --adapter=vmhba64
- esxcli iscsi adapter discovery rediscover --adapter vmhba64
   esxcli iscsi adapter param get -A vmhba64
+ esxcli iscsi adapter list
+== Error messages ==
+=== connection1:0: detected conn error (1020) ===
+These messages are seen when an iSCSI connection times out (1011 means timeout on initiator side and 1020 means the target dropped the connection)
+=== tgtadm: failed to send request hdr to tgt daemon, Transport endpoint is not connected ===
+tgtd not running&nbsp;:)
+&nbsp;
+=== tgtd: iser_ib_init(3436) Failed to initialize RDMA; load kernel modules? ===
+comment out default-driver
+&nbsp;
+=== iscsiadm: No portals found ===
+ACL issue, try something like
+ tgtadm --lld iscsi --op bind --mode target --tid 6 -I ALL
+&nbsp;
+=== iscsiadm: No records found ===
+Try
+ iscsiadm -m discovery -t sendtargets -p <ip-address>
+[[Category:Storage]]

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Iscsi: Difference between revisions

Latest revision as of 09:10, 26 April 2024

Links

Terminology

multipath

Implementations

IET

LIO

SCST

STGT

ISTGT

Comstar

TGT

open-iscsi

FreeBSD

FAQ

On ISCSI client

Find targets

List connected targets

List targets

Connect to target

Disconnect from target

Show session id

Rescan ??

Disconnect all targets

Rescan session

iscsiadm: Could not log into all portals

On server

list targets

list connected targets

Create iscsi target and Lun

Delete iscsi target and Lun

Reload tgtd configuration

Show tgdt config

Grow/resize target

Show targets

Show target config

The disk contains an unclean file system (0, 0).

On ESXi

Mounting iscsi datastore

List connected targets

Do the iSCSI Discovery for the iSCSI Host Bus Adapter.

List targets

Some commands

Error messages

connection1:0: detected conn error (1020)

tgtadm: failed to send request hdr to tgt daemon, Transport endpoint is not connected

tgtd: iser_ib_init(3436) Failed to initialize RDMA; load kernel modules?

iscsiadm: No portals found

iscsiadm: No records found

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