Juju 2.9 RC7 Release Notes

The Juju team is pleased to announce Juju 2.9rc7!

This is primarily a bug fix release.

Juju 2.9rc7 fixes the following issues in Juju 2.9rc6:

  • LP # 1918486 - Juju 2.9 doesn’t work with Juju 2.8 Kubernetes credentials

Additional bugs fixed can be found on the 2.9 milestone page.

K8s sidecar charms and Pebble support

This release adds preliminary support for “sidecar” charms, a new approach to Kubernetes charms in which the charm container runs in the same pod as the workload container (instead of in a separate pod). Included with this is a feature preview of Pebble, a lightweight process supervisor for use with sidecar charms.

You can try out the demonstration snappass-test sidecar charm by following the instructions in the README.

More details about this change in this post!

Kube Config Bootstrap Support

It is now possible to bootstrap to Kubernetes clusters defined in the users local Kubernetes config files. You can the list of available clusters by typing juju clouds and then bootstrapping with juju bootstrap <cloud>

Hirsute support

Hirsute controllers and workloads are supported.
--force is currently needed because hirsute is not yet official released.
juju bootstrap lxd --bootstrap-series=hirsute --force --config image-stream=daily

Known Issues:

  • Pebble/sidecar charms: environment variables specified in the layer config aren’t passed to the process being started. This will be fixed in 2.9rc8.
  • Pebble/sidecar charms: the Pebble layer configuration still uses the term “default: start/stop” in this release. This will be updated to “startup: enabled/disabled” in 2.9rc8, which will require updating layer configuration in charm code in sidecar charms.

How do I install Juju?

The best way to get a specific release of Juju is to install the snap from the appropriate channel. snap info juju will give you a list of the current channels and the versions published in them. For the latest stable release of Juju:

sudo snap install juju --classic --channel=2.9/candidate

The Juju CLI is available for a variety of platforms, including Windows and macOS. Refer to the installation documentation for details.

How do I upgrade?

There are three binaries that make up a Juju deployment - the client, the server and the agents. To upgrade a running system:

Upgrade the client

Make sure you have the version of the Juju CLI that you want running across the system (controller and agents in any deployed models). If you installed the Juju snap, it will automatically be updated daily from the channel you selected, but you might want to sudo snap switch juju --channel=2.9/candidate for example, to get a particular version. To get the latest binary from your channel:

snap refresh juju 

Upgrading the Juju client through other channels

Check version

Make sure that you’re using the Juju version you want.

juju version

What to do if Juju reports an old version

Backing up

The controller state can be saved to allow for recovery in case the upgrade process encounters a serious error.

juju create-backup

Upgrade a Juju server

You can see which servers your client knows about, and their versions, with this command:

juju controllers
Controller  ...  Version
azure*      ...  2.8.3  
jaas        ...  2.7.6  

You can instruct a server to upgrade itself to the latest version:

juju upgrade-controller <controller>

How to upgrade the controller

Upgrade deployed agents

Each running model includes a set of Juju agents which manage the communication between your charms and the Juju server. Your model agents remain at the same version until you ask to upgrade them.

juju upgrade-model <model>

How to upgrade your model(s)

Further instructions

For detailed information about the upgrade process please see:

Feedback Appreciated!

Let us know how you’re using Juju! Please ask questions on discourse.charmhub.io, tweet us @juju_devops with the hashtag #juju_devops, and chat with us at #juju on Freenode.


Looking forward alot to this.

Hope it will now work with cross model relations with JEM/JIMM and the new GUI?

Awesome work!

As far as I am aware, CMR support is currently under development on the new dashboard so it will be a little time yet before support is enabled.
On the JIMM side of things, I know some CMR updtes landed in master a few weeks back. I’ll let @martin-hilton comment on the release timeline. It will be after Juju 2.9.0 ships as there’s logistics involved in rolling it out.

1 Like