Add deprecation notice for OOL

Add deprecation notice for OpenStack on LXD.

Cleanup: remove unneeded entries and links.

Change-Id: I560b9e7253389b93a0a7ed3f5f034273c5f0f0c3

doc/source/2101.rst

@@ -45,6 +45,13 @@ n/a
 Deprecation notices
 -------------------
 
+OpenStack on LXD documentation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The OpenStack on LXD documentation was moved from the OpenStack Charm Guide to
+the `openstack-on-lxd`_ repository. Users wishing to use an all-in-one
+OpenStack solution should explore the `MicroStack`_ project.
+
 Removed features
 ----------------
 
@@ -114,30 +121,6 @@ Mounting snapshots using the File Recovery Manager appliance fails due to
 permissions errors encountered during the libvirt/qemu snapshot mount process
 on compute nodes. See bug `LP #1888389`_ for details.
 
-Octavia and neutron-openvswitch in LXD
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-.. note::
-
-   This issue is due to a Juju bug, which was fixed in Juju 2.8.1.
-
-The octavia charm requires a neutron-openvswitch subordinate which means that
-if it runs in a container, the openvswitch kernel module must be loaded before
-the container starts. Module loading is done by LXD based on the profile
-applied by Juju and taken from the neutron-openvswitch charm. However, due to
-bug `LP #1876849`_ in Juju, there is no guarantee that the profile will be
-applied before neutron-openvswitch execution starts in a container.
-
-The issue is more likely to happen on disaggregated deployments where octavia
-units run in LXD containers on machines that do not have any units of
-neutron-openvswitch running on bare metal.
-
-In order to work around the error an operator needs to make sure the
-``openswitch`` module is loaded on the host and then restart the
-``openvswitch-switch.service`` service inside the LXD container where the
-respective neutron-openvswitch unit is present. After that the unit error can
-be resolved.
-
 OpenStack os-brick, Ceph Octopus, and Focal
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -219,17 +202,14 @@ Deployment Guide`_ for more details.
 .. _Release schedule: release-schedule.html
 .. _OpenStack upgrades: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-upgrade-openstack.html
 .. _Vault section: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-vault.html
-.. _Open vSwitch Integration Guide for Centralized Control: https://docs.openvswitch.org/en/latest/topics/integration/
 .. _Certificate Lifecycle Management: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-certificate-management.html
-.. _Migration from Neutron ML2+OVS to ML2+OVN section of the OVN: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-ovn.html#migration-from-neutron-ml2-ovs-to-ml2-ovn
+.. _MicroStack: https://microstack.run
-.. _Octavia deprecation notes for Victoria: https://docs.openstack.org/releasenotes/octavia/victoria.html#deprecation-notes
+.. _openstack-on-lxd: https://github.com/openstack-charmers/openstack-on-lxd
 
 .. COMMITS
 
 .. BUGS
-.. _LP #1809190: https://bugs.launchpad.net/charm-neutron-gateway/+bug/1809190
 .. _LP #1839019: https://bugs.launchpad.net/charm-designate/+bug/1839019
-.. _LP #1876849: https://bugs.launchpad.net/charm-neutron-openvswitch/+bug/1876849
 .. _LP #1877594: https://bugs.launchpad.net/charm-neutron-gateway/+bug/1877594
 .. _LP #1876730: https://bugs.launchpad.net/netplan/+bug/1876730
 .. _LP #1890628: https://bugs.launchpad.net/charm-neutron-api-plugin-arista/+bug/1890628