tripleo

Moving cinder from host to containers changes ownership of files on NFS backend

Bug #1887435 reported by Alan Bishop
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
tripleo
Fix Committed
Medium
Alan Bishop
tripleo wallaby-1

Bug Description

When a cinder driver uses NFS to access volumes on a storage backend, upgrading from Pike to Queens causes files on the NFS share to change ownership to 42407:42000 (the UID:GID for cinder:kolla). This happens because kolla's startup script for the cinder-volume service recursively changes the ownership of anything in cinder's /var/lib/cinder service directory [1].

[1] https://opendev.org/openstack/kolla/src/branch/stable/queens/docker/cinder/cinder-volume/extend_start.sh#L4

This is a problem when upgrading from a non-containerized deployment (Pike). Although the cinder-volume service has been stopped on the host, the NFS share is still mounted. Later, when kolla executes [1], files on the backend are affected because the NFS mount point is under /var/lib/cinder/mnt.

Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix proposed to tripleo-heat-templates (stable/queens)

Fix proposed to branch: stable/queens
Review: https://review.opendev.org/741940

Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix merged to tripleo-heat-templates (stable/queens)

Reviewed: https://review.opendev.org/741940
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=6df5268155f20dcd283200d050d5d44a2136d42b
Submitter: Zuul
Branch: stable/queens

commit 6df5268155f20dcd283200d050d5d44a2136d42b
Author: Alan Bishop <email address hidden>
Date: Mon Jul 20 06:09:56 2020 -0700

    [queens-only] Unmount cinder NFS shares during upgrade

    Unmount any cinder NFS shares on the host when upgrading cinder from
    running on the host to running in a kolla container. This ensures
    there are no active NFS mounts in cinder's service directory prior to
    launching the container. Kolla recusively changes the ownership of
    /var/lib/cinder, so removing the mounts prevents kolla from inadvertently
    changing the ownership of files on the NFS storage backends.

    Closes-Bug: #1887435
    Change-Id: I5f0cedb808c6371caee6918da5b8bef743971221

tags: added: in-stable-queens
Emilien Macchi (emilienm)
Changed in tripleo:
milestone: victoria-1 → victoria-3
Marios Andreou (marios-b)
Changed in tripleo:
milestone: victoria-3 → wallaby-1
Alan Bishop (alan-bishop)
Changed in tripleo:
status: Triaged → Fix Committed
Revision history for this message
OpenStack Infra (hudson-openstack) wrote : Fix included in openstack/tripleo-heat-templates queens-eol

This issue was fixed in the openstack/tripleo-heat-templates queens-eol release.

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