Table of Contents

iscsiadm

List visible iscsi nodes:

  iscsiadm -m node -o show

List current iscsi sessions:

  iscsiadm -m session -o show

Verbose list current iscsi sessions:

  iscsiadm -m session -P3

Login session

  iscsiadm -m node --login

Logout session

  iscsiadm -m node --logout

Disable an iSCSI target:

  iscsiadm --m node -T iqn.2007-06.com.test.cluster1:storage.cluster1 --portal 172.16.48.175:3260 -u

Delete an iSCSI target:

  iscsiadm --m node -T iqn.2007-06.com.test.cluster1:storage.cluster1 --portal 172.16.48.175:3260 -u 
  

Rescan an iSCSI target (e.g. you increased size of the LUN):

  iscsiadm -m node -T iqn.2007-06.com.test.cluster1:storage.cluster1 -R

Prepare to move your Volume Group to another Host

Use lsof to determine that no processes are using the disk:

  lsof | grep compaction

Umount the Drive

  umount /srv/compaction

Mark the volume group inactive:

  vgchange -an  vg_mosura

Export the volume group

  vgexport vg_mosura

Unmounting ISCSI Devices

Identify your mounted drive:

  % iscsiadm -m session
  tcp: [1] 192.168.50.37:3260,1 iqn.1992-05.com.emc:apm001414067230000-1-vnxe

At this point you could logout of the node:

  iscsiadm -m node --targetname iqn.1992-05.com.emc:apm001414067230000-1-vnxe  --logout
  iscsiadm -m node --targetname iqn.1992-05.com.emc:apm001414067230000-2-vnxe  --logout

Turn off iscsi discovery

  iscsiadm -m discovery --portal 192.168.50.38 --op=delete
  iscsiadm -m discovery --portal 192.168.50.37 --op=delete

Finally, on mosura, set noaccess to the devices during reinstallation. We don't want the kickstart to find them and erase them.

Mounting the iSCSI Devices

If you need to make a new trust on mosura, your iqn is here:

  cat /etc/iscsi/initiatorname.iscsi

On mosura' management console, make them visible to the host

  iscsiadm -m discovery --portal 192.168.50.37 -t st
  iscsiadm -m discovery --portal 192.168.50.38 -t st

Check that you found your node

  iscsiadm -m  node

Login to your node

  iscsiadm -m node --targetname iqn.1992-05.com.emc:apm001414067230000-1-vnxe  --login
  iscsiadm -m node --targetname iqn.1992-05.com.emc:apm001414067230000-2-vnxe  --login

Confirm your session and check available disks:

  iscsiadm -m session -P3

Import the Volume Group for Mount

Import

  pvscan

Import the Voluem Group

  vgimport vg_mosura

Activate the voume group:

  vgchange -ay  vg_mosura

Mount Your Volume Group

  mkdir -p    /srv/compaction
  mount  /dev/vg_mosura/compaction    /srv/compaction
hardware/storage/iscsi.txt · Last modified: 2017/10/04 11:07 by Hans
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