I’m a little confused by the various channels. Take this example from keystone. If yoga/stable is 572, why is latest/stable 539? Shouldn’t it be at least 572? The same for edge. Xena/edge is 573 so how can latest/edge be only 570?
latest/stable: 539 2022-02-09 (539) 494kB
latest/candidate: ^
latest/beta: ^
latest/edge: 570 2022-05-16 (570) 781kB
yoga/stable: 572 2022-06-15 (572) 781kB
yoga/candidate: ^
yoga/beta: ^
yoga/edge: ^
xena/stable: --
xena/candidate: --
xena/beta: --
xena/edge: 573 2022-06-10 (573) 772kB
wallaby/stable: --
wallaby/candidate: --
wallaby/beta: --
wallaby/edge: 539 2022-03-04 (539) 494kB
For the OpenStack charms, latest corresponds to the 21.10 release, as latest/stable is what the un-specified charmstore (cs:) links maps onto. As there’s not a good way to get a pre Juju 2.9 client to work with charmhub links, it was decided to keep latest/stable as something that will always work with pre-2.9 and use specific, named, tracks moving forward.
This may all change at some point in the future, but is likely to stay this way for a while.
So if I am using Juju 2.9 (2.9.31 to be exact) then I should avoid using “latest/stable” ?
What should I use instead? “Yoga/stable” for openstack and “8.0/stable” for mysql?
You absolutely could use latest/stable, but that’s the charm release that shipped half a year ago. Regarding what channels, it depends a bit on what you want - the closest thing to a (conceptual) latest/edge would be to use zed/edge, but yoga/stable is probably more reasonable. For Ceph, you’d use quincy/stable, mysql is 8.0/stable, rabbitmq is 3.9/stable
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