This patch modifies the existing openstack upgrade tests so that they
work with focal (by explicitly supporting mysql-innodb-cluster), and are
also interruptable and resumable (at a charm level). It also makes them
work with the udpated 'get_upgrade_groups()' that ultimately gets a List
of Tuples rather than a dictionary.
The biggest change is that the upgrade_groups() is a list of tuples ...
[()] ... rathern than a collections.OrderedDict(). This tends to make
more sense as they are processed in order and don't actually need to be
indexed.
Also excludes easyrsa (as it's not an upgrade target) and adds a
"Database Services" which upgrades mysql or percona FIRST before moving
on to rabbitmq and other stateful services. This is because some charms
really need to talk to mysql if one of the other stateful services does
a relation changed hook. This makes it more likely that the system will
ugprade correctly.
By including pre and pos-application functions, charm
series upgrades can be handled in a more generic way,
even when they require running additional actions
before a unit is upgraded, or after the whole application
is upgraded.
Peter Matulis
Alex Kavanagh
Alex Kavanagh
Liam Young
Chris MacNaughton
Chris MacNaughton