After OSP13 minor update, iscsiadm command gets an error and the volume attach always fails.

Issue

• After OSP13 minor update, iscsiadm command gets an error and the volume attach always fails.

# iscsi adm -m node -p XXX.XXX.XXX.XXX --login
Logging in to [iface: default, target: iqn.AAAA-AA.AAA.AAAA:AAA, portal: XXX.XXX.XXX.XXX,XXX] (multiple)
iscsiadm: Could not login to [iface: default, target: iqn.AAAA-AA.AAA.AAAA:AAA, portal: XXX.XXX.XXX.XXX,XXX].
iscsiadm: initiator reported error (12 - iSCSI driver not found. Please make sure it is loaded, and retry the operation)
iscsiadm: Could not log into all portals

• /var/log/messages may contain following error.

journal:libkmod: kmod_module_insert_module: could not find module by name=''
journal:iscsid: Could not insert module . Kmod error -38