Hi Everyone,
First time posting here. I'm trying to write a script that automatically sets up targets at boot time. I created it with python. It reads in a list of target and initiator wwn's and tries to map them. So far so good with a one to one mapping of wwn's. I'm running into a problem when I have multiple initiators mapped to one target. RTSLib says I can't have multiple initiator acl's. The thing I don't understand is that the targetcli does this without issue.
Any help would be greatly appreciated! Here's the snippet of code I am stuck on and the error message I'm receiving:
#acl_wwn is a list of wwn's.
def createTarget(lun_id,name,dev_path,acl_wwn,fabric_wwn):
#acl_wwn[] could have multiple values. Map each to the same lun
print 'Creating target: "' + str(lun_id) + '" "' + name+ '" "' + dev_path + '" "' + acl_wwn[0].rstrip('\n') + '" "' + fabric_wwn + '"'
backstore = IBlockBackstore(lun_id, mode='create')
try:
so = IBlockStorageObject(backstore, name, dev=dev_path, gen_wwn=True)
except:
backstore.delete()
raise
# Create an FC target endpoint using a qla2xxx WWPN
fabric = FabricModule('qla2xxx')
target = Target(fabric, fabric_wwn)
#tpg = TPG(target, lun_id)
# Export LUN id# via the 'so' StorageObject class
# Setup the NodeACL for an FC initiator, and create MappedLUN 0
#map_lun = tpg.lun(lun_id, so, name)
for a in acl_wwn:
tpg = TPG(target, lun_id)
map_lun = tpg.lun(lun_id, so, name)
a = a.rstrip('\n')
#node_acl = tpg.node_acl(a)
#mapped_lun = node_acl.mapped_lun(mapped_lun=map_lun.lun, tpg_lun=map_lun.lun, write_protect=False)
node_acl = NodeACL(tpg, a, mode="create")
MappedLUN(node_acl, map_lun.lun, map_lun.lun, write_protect=False)
And the output:
root@dlcephproxy01b:/etc/init.d# ./rbdmount -c /etc/ceph/mounts
Qlini mode is disabled. Proceeding forward
mapping: dvmesx01_lun1
mapping: lwhyperv01_lun1
updating: /dev/rbd1
updating: /dev/rbd2
Creating target: "1" "dvmesx01_lun1" "/dev/rbd1" "10:00:00:00:c9:e0:4a:19" "21:00:00:1b:32:18:b4:0f"
Traceback (most recent call last):
File "./rbdmount", line 131, in <module>
main()
File "./rbdmount", line 127, in main
createTarget(m.rbd_id,m.image_name,m.device,m.initiator_wwn,m.target_wwn)
File "./rbdmount", line 82, in createTarget
map_lun = tpg.lun(lun_id, so, name)
File "/usr/lib/python2.7/dist-packages/rtslib/target.py", line 1176, in lun
return LUN(self, lun=lun, storage_object=storage_object, alias=alias)
File "/usr/lib/python2.7/dist-packages/rtslib/target.py", line 399, in __init__
self._create_in_cfs_ine('create')
File "/usr/lib/python2.7/dist-packages/rtslib/target.py", line 409, in _create_in_cfs_ine
super(LUN, self)._create_in_cfs_ine(mode)
File "/usr/lib/python2.7/dist-packages/rtslib/node.py", line 66, in _create_in_cfs_ine
% self.__class__.__name__)
rtslib.utils.RTSLibError: This LUN already exists in configFS.
Depending on how I rework the code I get something like this:
root@dlcephproxy01b:/etc/init.d# rbd showmapped
id pool image snap device
3 csc dvmesx01_lun1 - /dev/rbd3
4 csc lwhyperv01_lun1 - /dev/rbd4
root@dlcephproxy01b:/etc/init.d# rbd unmap /dev/rbd3
root@dlcephproxy01b:/etc/init.d# rbd unmap /dev/rbd4
root@dlcephproxy01b:/etc/init.d# ./rbdmount -c /etc/ceph/mounts
Qlini mode is disabled. Proceeding forward
mapping: dvmesx01_lun1
mapping: lwhyperv01_lun1
updating: /dev/rbd1
updating: /dev/rbd2
Creating target: "1" "dvmesx01_lun1" "/dev/rbd1" "10:00:00:00:c9:e0:4a:19" "21:00:00:1b:32:18:b4:0f"
Creating target: "2" "lwhyperv01_lun1" "/dev/rbd2" "10:00:00:00:c9:81:da:43" "21:00:00:1b:32:18:b4:0f"
Traceback (most recent call last):
File "./rbdmount", line 129, in <module>
main()
File "./rbdmount", line 125, in main
createTarget(m.rbd_id,m.image_name,m.device,m.initiator_wwn,m.target_wwn)
File "./rbdmount", line 74, in createTarget
tpg = TPG(target, lun_id)
File "/usr/lib/python2.7/dist-packages/rtslib/target.py", line 999, in __init__
raise RTSLibError("Target cannot have multiple TPGs.")
rtslib.utils.RTSLibError: Target cannot have multiple TPGs.
Thanks,
Chris Holcombe
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