Juju emits the
<container>-pebble-custom-notice event when a Pebble notice of type “custom” occurs for the first time or repeats. There is one
<container>-pebble-custom-notice event for each container defined in
charmcraft.yaml. This event allows the charm to respond to custom events that happen in the workload container.
This event is specific to Kubernetes sidecar charms and is only ever fired on Kubernetes deployments.