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Improve deprecation text

This improves the messaging surrounding the
deprecation of this charm.

Fix links.

The removed upstream links will be placed in the
linked CDG resource (on upgrading to non-focal
series).

Change-Id: I6c00fa9f452583cdf5072938e57b4cf611a3115f
changes/78/767378/2
Peter Matulis 2 months ago
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4335d0b525
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      README.md

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@ -11,12 +11,25 @@ list of such charms can be obtained from the [Charm
Store][charms-requires-mysql-shared] (the charms officially supported by the
OpenStack Charms project are published by 'openstack-charmers').
> **Important**: The eoan series is the last series supported by the
percona-cluster charm. It is replaced by the
[mysql-innodb-cluster][mysql-innodb-cluster-charm] and
[mysql-router][mysql-router-charm] charms in the focal series. See
[percona-cluster charm: series upgrade to
Focal][cdg-percona-migration-to-mysql8] for migration steps.
## Series upgrades
### Deprecation of percona-cluster charm on focal series
The eoan series is the last series supported by the percona-cluster charm. It
is replaced by the [mysql-innodb-cluster][mysql-innodb-cluster-charm] and
[mysql-router][mysql-router-charm] charms in the focal series. The migration
steps are documented in [percona-cluster charm: series upgrade to
focal][cdg-upgrade-special-percona].
> **Caution**: Do not upgrade (to the focal series) the machines hosting
percona-cluster units. To be clear, if percona-cluster is containerised then
it is the LXD container that must not be upgraded.
### Upgrades to non-focal series
The procedure to upgrade to a pre-focal series, and thus to a new Percona
version, is documented in the [OpenStack Charms Deployment
Guide][cdg-upgrade-series-openstack-procedures].
# Usage
@ -206,16 +219,6 @@ space should be used for access to MySQL databases services from other charms.
will continue to function; this option is preferred over any network space
binding provided for the 'shared-db' relation if set.
## Series upgrade
The procedure to upgrade the series of the machines hosting percona-cluster is
documented in the [OpenStack Charms Deployment Guide][cdg-procedures].
Upstream documentation is also available:
* [Upgrading Percona XtraDB Cluster][upstream-upgrading-percona]
* [Percona XtraDB Cluster In-Place Upgrading Guide: From 5.5 to 5.6][upstream-upgrading-55-to-56]
* [Galera replication - how to recover a PXC cluster][upstream-recovering]
# Bugs
@ -232,12 +235,9 @@ For general charm questions refer to the [OpenStack Charm Guide][cg].
[mysql-memory-calculator]: http://www.mysqlcalculator.com/
[lp-bugs-charm-percona-cluster]: https://bugs.launchpad.net/charm-percona-cluster/+filebug
[upstream-performance-schema]: http://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-6.html#mysqld-5-6-6-performance-schema
[upstream-upgrading-percona]: https://www.percona.com/doc/percona-xtradb-cluster/LATEST/howtos/upgrade_guide.html
[upstream-upgrading-55-to-56]: https://www.percona.com/doc/percona-xtradb-cluster/5.6/upgrading_guide_55_56.html
[upstream-recovering]: https://www.percona.com/blog/2014/09/01/galera-replication-how-to-recover-a-pxc-cluster/
[juju-docs-actions]: https://jaas.ai/docs/actions
[cdg-percona-migration-to-mysql8]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-series-upgrade-specific-procedures.html#percona-cluster-charm-series-upgrade-to-focal
[cdg-percona-startup]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-managing-power-events.html#id22
[mysql-router-charm]: https://jaas.ai/mysql-router
[mysql-innodb-cluster-charm]: https://jaas.ai/mysql-innodb-cluster
[cdg-procedures]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/app-series-upgrade-openstack.html#procedures
[cdg-upgrade-special-percona]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/percona-series-upgrade-to-focal.html
[cdg-upgrade-series-openstack-procedures]: https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/latest/upgrade-series-openstack.html#procedures

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