charm-deployment-guide/deploy-guide/source/upgrade-special.rst

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Special charm procedures
========================
Upgrades, of either of the three types, may occasionally introduce unavoidable
challenges. For instance, it could be that a charm is replaced by an entirely
new charm on a new series or a new charm is needed to accommodate a new service
on a new OpenStack release. These kinds of special procedures are documented on
this page.
See the :doc:`upgrade-overview` page for general upgrade information.
Procedures
----------
.. toctree::
:maxdepth: 1
cinder-lvm-migration
percona-series-upgrade-to-focal
ceph-charm-migration
charmhub-migration
ovn-migration