scripts/iscsi.py

   1 #!/usr/bin/env python
   2 #
   3 # iscsi.py - Copyright (C) 2011 Red Hat, Inc.
   4 # Written by Joey Boggs <jboggs@redhat.com>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; version 2 of the License.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18 # MA  02110-1301, USA.  A copy of the GNU General Public License is
  19 # also available at http://www.gnu.org/copyleft/gpl.html.
  20
  21 import os
  22 from ovirtnode.ovirtfunctions import *
  23 import logging
  24
  25 INITIATOR_FILE="/etc/iscsi/initiatorname.iscsi"
  26
  27 def set_iscsi_initiator(initiator_name):
  28     iscsi_config = open(INITIATOR_FILE, "w")
  29     iscsi_config.write("InitiatorName=" + initiator_name + "\n")
  30     iscsi_config.close()
  31     if ovirt_store_config(INITIATOR_FILE):
  32         logger.info("Initiator name set as: " + initiator_name)
  33     else:
  34         logger.warning("Setting initiator name failed")
  35     os.system("service iscsi restart &> /dev/null")
  36
  37 def get_current_iscsi_initiator_name():
  38     iscsi_config = open(INITIATOR_FILE)
  39     initiator_name = ""
  40     for line in iscsi_config:
  41         if "InitiatorName" in line:
  42             initiator_name = line.replace("InitiatorName=","")
  43             return initiator_name.strip()
  44
  45 def iscsi_auto():
  46     if not OVIRT_VARS.has_key("OVIRT_ISCSI_NAME"):
  47         logger.info("Generating iSCSI IQN")
  48         iscsi_iqn_cmd = subprocess.Popen("/sbin/iscsi-iname", stdout=PIPE)
  49         iscsi_iqn, err = iscsi_iqn_cmd.communicate()
  50         set_iscsi_initiator(iscsi_iqn.strip())
  51     else:
  52         set_iscsi_initiator(OVIRT_VARS["OVIRT_ISCSI_NAME"])