Mounting a Kubernetes Volume with Quarkus
I recommend you look at your kubernetes.yml and kubernetes.json files under target/kubernetes
For the first error. It looks like my-volume needs to exist in your cluster either as a Persistent Volume.
For the second error quarkus.kubernetes.config-map-volumes.my-volume.config-map-name=my-volume is meant to be used as a ConfigMap so the actual ConfigMap needs to be defined/exist in your cluster.