** Description changed:
+ == Impact ==
+
+ instances cannot be stopped and then started
+
+ == Test Case ==
+
+ Deploy OpenStack (using Juju Charms)
+ Create networking and boot an instance
+ stop the instance
+ start the instance
+ (fails with permissions errors)
+
+ == Regression Potential ==
+
+ Low - the proposed change opens the permission under /var/lib/nova to
+ allow for the odd ownership changes that happen during instance
+ lifecycle.
+
+ == Original Bug Report ==
+
bionic or focal with OpenStack Ussuri.
The latest version of the nova package sets permissions on package
update for /var/lib/nova:
- find /var/lib/nova -exec chown nova:nova "{}" +
- find /var/lib/nova -type f -exec chmod 0640 "{}" + -o -type d -exec chmod
0750 "{}" +
+ find /var/lib/nova -exec chown nova:nova "{}" +
+ find /var/lib/nova -type f -exec chmod 0640 "{}" + -o -type d -exec chmod
0750 "{}" +
However, when managing vm's via libvirt, various ownership changes
happen to the underlying disks that mean that nova can no longer access
the disk files with 0640 permissions.
The disks (and base image) for a vm are created as nova:nova; libvirt
then shifts the ownership to libvirt-qemu:kvm as the vm starts. When
the vm is stopped the ownership reverts to root:root.
0640 permissions are maintained - however nova is not part of the root
or kvm groups so cannot access the file - which means the instance
cannot be restarted.
The following permissions are required for correct operation:
- find /var/lib/nova -type f -exec chmod 0644 "{}" + -o -type d -exec
+ find /var/lib/nova -type f -exec chmod 0644 "{}" + -o -type d -exec
chmod 0755 "{}" +
** Changed in: nova (Ubuntu Groovy)
Status: Triaged => In Progress
** Changed in: nova (Ubuntu Focal)
Status: Triaged => In Progress
** Changed in: cloud-archive/ussuri
Status: Triaged => In Progress
** Changed in: cloud-archive/victoria
Status: Triaged => In Progress
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https://bugs.launchpad.net/bugs/1885269
Title:
ussuri: unable to stop and start an instance post upgrade
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