Found while testing cinder-backup with ceph on Ubuntu Focal, which
installs ceph Octopus. Octopus apparently enforces the requirement
that the config file contain a '[global]' section for general
requirements. The '[global]' section goes back at least to ceph
Hammer [0], so we will simply add it to the temporary ceph config
file that os-brick generates in the RBDConnector class.
[0] https://docs.ceph.com/docs/hammer/rados/configuration/mon-config-ref/
Co-authored-by: Alex Kavanagh <alex@ajkavanagh.co.uk>
Co-authored-by: Ivan Kolodyazhny <e0ne@e0ne.info>
Change-Id: I86eb31535d990291945de5d9846b1a03157ec2cf
Closes-bug: #1865754
(cherry picked from commit c6ad4d864c)
(cherry picked from commit 474583b4f8)
(cherry picked from commit 91c73a433a)
57409c28b5