How Canonical Kubernetes CAPI Providers Handle In-Place Upgrades

Upgrading the machines of a Kubernetes cluster provisioned by the Cluster API can be achieved by utilizing In-Place upgrades. In Canonical Kubernetes, the orchestrated in-place upgrades happen by applying custom annotations on objects and reconciling those objects to reach the desired state (i.e. an upgraded object/cluster). In this blog, we’re gonna take a deep look at the inner workings of this process.