Comment 19 for bug 1809249

Reviewed: https://review.opendev.org/677801
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=df7fd514a77734e5d57a56d5c0f34d0245efc86c
Submitter: Zuul
Branch: stable/rocky

commit df7fd514a77734e5d57a56d5c0f34d0245efc86c
Author: raghavendrat <email address hidden>
Date: Tue May 7 05:30:48 2019 -0700

    3PAR: Add config for NSP single path attach

    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: I2da5d4a0334f07967af5ff7aaa39a0ecc4b12204
    Closes-bug: #1809249
    Closes-bug: #1812665
    Closes-bug: #1734917

    (cherry picked from commit 9e122f11661b766b2fe2c3a12bab35ef6e14f3f1)