Public bug reported:
Hi colleagues.
I have some troubles with iscsiadm. iscsiadm sometimes creates LUN but
does not show attached disk. My device is really exist.
Login:
>sudo -s iscsiadm --mode node --portal 192.168.1.86 --targetname
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879
--login 2>&1
Logging in to [iface: default, target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879,
portal: 192.168.1.86,3260] (multiple)
Login to [iface: default, target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879,
portal: 192.168.1.86,3260] successful.
Check result:
>sudo -s iscsiadm -m session -P 3 2>&1
Target:
iqn.2010-06.com.nutanix:vg-backup-3943a3b9-3745-4dd7-ba0e-72f25b4a417b
Current Portal: 192.168.1.86:3260,1
Persistent Portal: 192.168.1.86:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1993-08.org.debian:01:5bb3c3d5f39
Iface IPaddress: 192.168.0.43
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 10
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 120
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 1048576
FirstBurstLength: 262144
MaxBurstLength: 16776192
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 12 State: running
scsi12 Channel 00 Id 0 Lun: 0
Attached scsi disk sdc State: running
Target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879
Current Portal: 192.168.1.86:3260,1
Persistent Portal: 192.168.1.86:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1993-08.org.debian:01:5bb3c3d5f39
Iface IPaddress: 192.168.0.43
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 40
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 120
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 1048576
FirstBurstLength: 262144
MaxBurstLength: 16776192
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 42 State: running
scsi42 Channel 00 Id 0 Lun: 0
Target:
iqn.2010-06.com.nutanix:vg-backup-2c392880-0708-4911-86ed-16dfd4ff47f6
Current Portal: 192.168.1.86:3260,1
Persistent Portal: 192.168.1.86:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1993-08.org.debian:01:5bb3c3d5f39
Iface IPaddress: 192.168.0.43
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 6
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 120
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 1048576
FirstBurstLength: 262144
MaxBurstLength: 16776192
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 8 State: running
scsi8 Channel 00 Id 0 Lun: 0
Attached scsi disk sdb State: running
There is no string after scsi42 Channel 00 Id 0 Lun: 0:
Attached scsi disk sdd State: running
But device is really exist:
> ll /dev/disk/by-path/
Result:
lrwxrwxrwx 1 root root 9 сер 22 15:18
ip-192.168.1.86:3260-iscsi-iqn.2010-06.com.nutanix:vg-backup-2c392880-0708-4911-86ed-16dfd4ff47f6-lun-0
-> ../../sdb
lrwxrwxrwx 1 root root 9 сер 23 11:52
ip-192.168.1.86:3260-iscsi-iqn.2010-06.com.nutanix:vg-backup-3943a3b9-3745-4dd7-ba0e-72f25b4a417b-lun-0
-> ../../sdc
lrwxrwxrwx 1 root root 9 сер 23 19:02
ip-192.168.1.86:3260-iscsi-iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879-lun-0
-> ../../sdd
lrwxrwxrwx 1 root root 9 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0 ->
../../sda
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part1
-> ../../sda1
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part2
-> ../../sda2
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part5
-> ../../sda5
As we can see my target/lun connected to sdd.
If I make full re-login then all is ok:
> sudo iscsiadm -m node --logout
> ll /dev/disk/by-path/
lrwxrwxrwx 1 root root 9 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0 ->
../../sda
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part1
-> ../../sda1
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part2
-> ../../sda2
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part5
-> ../../sda5
> sudo -s iscsiadm --mode node --portal 192.168.1.86 --targetname
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879 --login
2>&1
Logging in to [iface: default, target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879,
portal: 192.168.1.86,3260] (multiple)
Login to [iface: default, target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879,
portal: 192.168.1.86,3260] successful.
Result:
> ll /dev/disk/by-path/
lrwxrwxrwx 1 root root 9 сер 24 14:38
ip-192.168.1.86:3260-iscsi-iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879-lun-0
-> ../../sdb
lrwxrwxrwx 1 root root 9 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0 ->
../../sda
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part1
-> ../../sda1
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part2
-> ../../sda2
lrwxrwxrwx 1 root root 10 сер 22 14:17 pci-0000:00:10.0-scsi-0:0:0:0-part5
-> ../../sda5
> sudo -s iscsiadm -m session -P 3 2>&1
Target:
iqn.2010-06.com.nutanix:vg-restore-99079f45-f62d-4df5-8955-d3f6ffa27879
Current Portal: 192.168.1.86:3260,1
Persistent Portal: 192.168.1.86:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1993-08.org.debian:01:5bb3c3d5f39
Iface IPaddress: 192.168.0.43
Iface HWaddress: <empty>
Iface Netdev: <empty>
SID: 41
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 120
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 262144
MaxXmitDataSegmentLength: 1048576
FirstBurstLength: 262144
MaxBurstLength: 16776192
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 43 State: running
scsi43 Channel 00 Id 0 Lun: 0
Attached scsi disk sdb State: running
After re-login the string with device name is exist:
Attached scsi disk sdb State: running
Cross link of this on stackoverflow:
https://stackoverflow.com/questions/45861219/iscsiadm-sometimes-
does-not-show-attached-device-iscsiadm-m-session-but-devic
** Affects: open-iscsi (Ubuntu)
Importance: Undecided
Status: New
** Tags: iscsiadm
** Tags added: iscsiadm
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https://bugs.launchpad.net/bugs/1712811
Title:
iscsiadm sometimes does not show attached device (iscsiadm -m session)
but device is really exist and attached
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