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["Davanum Srinivas \(DIMS\)" <davanum@xxxxxxxxx>]

** Also affects: cinder
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1449492

Title:
  Cinder not working with IPv6 ISCSI

Status in Cinder:
  New
Status in OpenStack Compute (Nova):
  New

Bug description:
  Testing configuring Openstack completely with IPv6

  Found that IP address parsing was thrown in a lot of cases because of
  need to have '[]' encasing the address, or not for use with URLs and
  the parsing of some user space 3rd party C binaries - iscsiadm for
  example. All the others are best left by using a name set to the IPv6
  address in the /etc/hosts file, iSCSI though its not possible.

  Got Cinder working by setting iscsi_ip_address
  (/etc/cinder/cinder.conf) to '[$my_ip]' where my ip is an IPv6 address
  like 2001:db08::1 (not RFC documentation address ?) and changing one
  line of python iin the nova virt/libvirt/volume.py code:

  
  --- nova/virt/libvirt/volume.py.orig    2015-04-27 23:00:00.208075644 +1200
  +++ nova/virt/libvirt/volume.py 2015-04-27 22:38:08.938643636 +1200
  @@ -833,7 +833,7 @@
       def _get_host_device(self, transport_properties):
           """Find device path in devtemfs."""
           device = ("ip-%s-iscsi-%s-lun-%s" %
  -                  (transport_properties['target_portal'],
  +                  (transport_properties['target_portal'].replace('[','').replace(']',''),
                      transport_properties['target_iqn'],
                      transport_properties.get('target_lun', 0)))
           if self._get_transport() == "default":

  Nova-compute was looking for '/dev/disk/by-path/ip-[2001:db08::1]:3260
  -iscsi-iqn.2010-10.org.openstack:*' when there were no '[]' in the
  udev generated path....

  This one can't be worked around by using the /etc/hosts file. iscsiadm
  and tgt ned the IPv6 address wrapped in '[]', and iscsadm uses it in
  output.  The above patch could be matched with a bi ihte cinder code
  that puts '[]' around iscsi_ip_address if if it is not supplied.

  More work is obvioulsy need on a convention for writing IPv6 addresses
  in the Openstack configuration files, and there will be a lot of
  places where code will need to be tweaked.

  Lets start by fixing this blooper/lo hanging one  first though as it
  makes it possible to get Cinder working in a pure IPv6 environment.
  Above may be a bit of a hack, but only one one code path needs
  adjustment...

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