azure fleet manager managing multiple aks cluster version/image upgrades

 You can use fleet manager to upgrade your aks cluster version and node image. First you need fleet manager and a member. Member can resides in different regions. 

You can see that a new AKS cluster gets created on top of the 2 we're trying to configured.

Go to Setting -> Multi-Cluster update -> Create manual run. 

Then under the page, specify the following options that you wanted.

Once it is created, click on the run and select "Start". This is pretty straight forward. 

It gets tricky when we get to create stage. Before you can create a stage, you need to assign / create an update group - as shown here. 

Once you have this defined, you can easily create a stage for your strategy. For example, 

Let's say you have 2 clusters, primary and secondary and you want to create a stage upgrade - upgrade secondary and then primary cluster.  This is where you can use stages. 

Create a manual run, this time use "Stage", then click on "Create stage". Then create a stage call "secondary" cluster upgrade. 

Then create a stage call "primary" cluster upgrade. 

You can change the running sequence - which stage gets executed - by clicking on "move up" or "move down". 

Once you have your strategy defined, then you can perform a node image upgrade.