Open Stack

Hi All

The title may seem a bit odd because surely yoga is the current release,
and zed is the current cycle?  This is true, so a little explanation is in
order.

As the charm-guide [1] explains, in the previous cycle, the OpenStack, and
supporting, charms moved from a single stable charm (for each component)
that supported multiple releases, to a charm+track that targets a specific
release [2].  The current release for the OpenStack charms is 'yoga' and
thus there is a yoga/stable track.  For a full explanation, please see [1].

Today, as part of our ongoing charmhub stable migration work this cycle, we
have (re)released the 21.10 charms (that supported queens -> xena) as
"xena" charms for OpenStack, "pacific" charms for Ceph, and "21.09" charms
for OVN.  The xena, pacific and 21.09-OVN channel charms have the same
features as the existing 21.10 charms, include bug-fixes and relevant
backports since the 21.10 charms were released, and have been re-tested and
verified as a set prior to being released to the xena/stable channel.  The
full list of charms for a "Xena" OpenStack system, including ceph, OVN,
mysql8, hacluster, rabbitmq-server, vault and others can be seen in the
docs at [3].

The xena/pacific/21.09 charms have been designed to be upgradable from the
21.10 charms if you are running a xena OpenStack, but please consult the
docs [4] about how to go about upgrading charms.  The charms also are able
to perform the OpenStack upgrade from wallaby -> xena, and again please
consult the docs [5] for upgrading OpenStack.

Our next stable maintenance release will be wallaby/pacific/20.12 (ovn), so
please keep an eye out on the mailing lists.

Thanks!


[1]
https://docs.openstack.org/charm-guide/latest/project/charm-delivery.html
[2]
https://juju.is/docs/olm/deploy-a-charm-from-charmhub#heading--specify-a-charmed-operator-channel
[3]
https://docs.openstack.org/charm-guide/latest/project/charm-delivery.html#channels-and-tracks-for-openstack-charms
[4]
https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/upgrade-charms.html
[5]
https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/upgrade-openstack.html

-- 
Alex Kavanagh - Software Engineer
OpenStack Engineering - Data Centre Development - Canonical Ltd
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