Migrations fail due to case sensitive paths

[Lucian Petrut]

A few case sensitive path comparisons can lead to migration failures. Windows paths are case insensitive and Hyper-V sometimes flips the path casing, affecting some of Nova's logic.

For example, when cold migrating instances between different CSVs, Nova will not update the VHD image paths if the casing is changed, later on failing to import the instance, leading to a migration failure: http://paste.openstack.org/raw/793566/.

In general, the Nova Hyper-V driver performs case insensitive checks. We'll have to fix all the case sensitive ones.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/728003

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/728003
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=d96fed4f3c5205b562865eefd4cffe1c1b151d4b
Submitter: Zuul
Branch: master

commit d96fed4f3c5205b562865eefd4cffe1c1b151d4b
Author: Lucian Petrut <email address hidden>
Date: Thu May 14 12:35:08 2020 +0300

    Fix case sensitive path comparisons

    Windows paths are case insensitive. Furthermore, Hyper-V even
    flips the casing in some cases.

    For that reason, we have to ensure that our path comparisons
    are case insensitive.

    Change-Id: I4cb059c6bdcb09f7e0c3217fe34654c8e197b67d
    Closes-Bug: #1878579

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/train
Review: https://review.opendev.org/729123

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/ussuri
Review: https://review.opendev.org/729124

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/stein
Review: https://review.opendev.org/729125

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/729124
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=4ad05407b199fc844ba4716f6e5e62f453374343
Submitter: Zuul
Branch: stable/ussuri

commit 4ad05407b199fc844ba4716f6e5e62f453374343
Author: Lucian Petrut <email address hidden>
Date: Thu May 14 12:35:08 2020 +0300

    Fix case sensitive path comparisons

    Windows paths are case insensitive. Furthermore, Hyper-V even
    flips the casing in some cases.

    For that reason, we have to ensure that our path comparisons
    are case insensitive.

    Change-Id: I4cb059c6bdcb09f7e0c3217fe34654c8e197b67d
    Closes-Bug: #1878579
    (cherry picked from commit d96fed4f3c5205b562865eefd4cffe1c1b151d4b)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/729123
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=2070a6c798a3eeea32de2751f4088e460f2e0f6a
Submitter: Zuul
Branch: stable/train

commit 2070a6c798a3eeea32de2751f4088e460f2e0f6a
Author: Lucian Petrut <email address hidden>
Date: Thu May 14 12:35:08 2020 +0300

    Fix case sensitive path comparisons

    Windows paths are case insensitive. Furthermore, Hyper-V even
    flips the casing in some cases.

    For that reason, we have to ensure that our path comparisons
    are case insensitive.

    Change-Id: I4cb059c6bdcb09f7e0c3217fe34654c8e197b67d
    Closes-Bug: #1878579
    (cherry picked from commit d96fed4f3c5205b562865eefd4cffe1c1b151d4b)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/729125
Committed: https://git.openstack.org/cgit/openstack/compute-hyperv/commit/?id=ab9f85b3fbb960578e4926195038c318420839a2
Submitter: Zuul
Branch: stable/stein

commit ab9f85b3fbb960578e4926195038c318420839a2
Author: Lucian Petrut <email address hidden>
Date: Thu May 14 12:35:08 2020 +0300

    Fix case sensitive path comparisons

    Windows paths are case insensitive. Furthermore, Hyper-V even
    flips the casing in some cases.

    For that reason, we have to ensure that our path comparisons
    are case insensitive.

    Change-Id: I4cb059c6bdcb09f7e0c3217fe34654c8e197b67d
    Closes-Bug: #1878579
    (cherry picked from commit d96fed4f3c5205b562865eefd4cffe1c1b151d4b)