I'm moving an Apache Mesos application, where my configurations are based in JSON, to Kubernetes, where my configurations are based in YAML. Would the JSON configuration files work as a YAML file since YAML is a superset of JSON, or would I need to write a new YAML file?
Yes, JSON works as well, it's just more pain than YAML to write it, manually. Also, you may be able to use micahhausler/container-transform to convert your Marathon specs to Kubernetes specs.