mirror of
https://github.com/ceph/ceph
synced 2024-12-29 15:03:33 +00:00
2a5755e076
Added details to specify the CHAP username and password while discovering/login the iSCSI target. Signed-off-by: Ashish Singh <assingh@redhat.com>
92 lines
2.4 KiB
ReStructuredText
92 lines
2.4 KiB
ReStructuredText
-------------------------
|
||
iSCSI Initiator for Linux
|
||
-------------------------
|
||
|
||
**Prerequisite:**
|
||
|
||
- Package ``iscsi-initiator-utils``
|
||
|
||
- Package ``device-mapper-multipath``
|
||
|
||
**Installing:**
|
||
|
||
Install the iSCSI initiator and multipath tools:
|
||
|
||
::
|
||
|
||
# yum install iscsi-initiator-utils
|
||
# yum install device-mapper-multipath
|
||
|
||
**Configuring:**
|
||
|
||
#. Create the default ``/etc/multipath.conf`` file and enable the
|
||
``multipathd`` service:
|
||
|
||
::
|
||
|
||
# mpathconf --enable --with_multipathd y
|
||
|
||
#. Add the following to ``/etc/multipath.conf`` file:
|
||
|
||
::
|
||
|
||
devices {
|
||
device {
|
||
vendor "LIO-ORG"
|
||
hardware_handler "1 alua"
|
||
path_grouping_policy "failover"
|
||
path_selector "queue-length 0"
|
||
failback 60
|
||
path_checker tur
|
||
prio alua
|
||
prio_args exclusive_pref_bit
|
||
fast_io_fail_tmo 25
|
||
no_path_retry queue
|
||
}
|
||
}
|
||
|
||
#. Restart the ``multipathd`` service:
|
||
|
||
::
|
||
|
||
# systemctl reload multipathd
|
||
|
||
**iSCSI Discovery and Setup:**
|
||
|
||
#. If CHAP was setup on the iSCSI gateway, provide a CHAP username and
|
||
password by updating the ``/etc/iscsi/iscsid.conf`` file accordingly.
|
||
|
||
#. Discover the target portals:
|
||
|
||
::
|
||
|
||
# iscsiadm -m discovery -t -st 192.168.56.101
|
||
192.168.56.101:3260,1 iqn.2003-01.org.linux-iscsi.rheln1
|
||
192.168.56.102:3260,2 iqn.2003-01.org.linux-iscsi.rheln1
|
||
|
||
#. Login to target:
|
||
|
||
::
|
||
|
||
# iscsiadm -m node -T iqn.2003-01.org.linux-iscsi.rheln1 -l
|
||
|
||
**Multipath IO Setup:**
|
||
|
||
The multipath daemon (``multipathd``), will set up devices automatically
|
||
based on the ``multipath.conf`` settings. Running the ``multipath``
|
||
command show devices setup in a failover configuration with a priority
|
||
group for each path.
|
||
|
||
::
|
||
|
||
# multipath -ll
|
||
mpathbt (360014059ca317516a69465c883a29603) dm-1 LIO-ORG ,IBLOCK
|
||
size=1.0G features='0' hwhandler='1 alua' wp=rw
|
||
|-+- policy='queue-length 0' prio=50 status=active
|
||
| `- 28:0:0:1 sde 8:64 active ready running
|
||
`-+- policy='queue-length 0' prio=10 status=enabled
|
||
`- 29:0:0:1 sdc 8:32 active ready running
|
||
|
||
You should now be able to use the RBD image like you would a normal
|
||
multipath’d iSCSI disk.
|