Comment 8 for bug 1809249

Reviewed: https://review.opendev.org/657585
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=b7c81a7b426136314fb12f5aafcb977b25d49cc6
Submitter: Zuul
Branch: master

commit b7c81a7b426136314fb12f5aafcb977b25d49cc6
Author: raghavendrat <email address hidden>
Date: Tue May 7 05:30:48 2019 -0700

    3PAR: Provide new option to specify NSP for single path attachments

    This fix aims to resolve below mentioned bugs:
    https://bugs.launchpad.net/os-brick/+bug/1812665
    https://bugs.launchpad.net/cinder/+bug/1809249
    https://bugs.launchpad.net/cinder/+bug/1734917

    Given a system connected to HPE 3PAR via FC and multipath is disabled.
    When user tries to create bootable volume, it fails intermittently
    with following error:
    Fibre Channel volume device not found

    This happens when a zone is created using second or later target nsp
    from 3PAR backend.
    In this case, HPE 3PAR client code picks up first target nsp to form
    initiator target map.

    To avoid above mentioned failure, user can specify target nsp in 3PAR
    backend section of cinder.conf as follows:

    hpe3par_target_nsp = <n:s:p>

    This target information is read from cinder.conf and respective
    wwn information is fetched.
    Later initiator target map is created using wwn information and
    bootable volume is created successfully.

    Change-Id: If77d384afbc7097ed55a03e9b4bc7f8e1966a5c5
    Closes bug: #1809249