less than a number:
configmap
https://docs.openshift.com/container-platform/4.9/nodes/pods/nodes-pods-configmaps.html
combination of configuration files, command line arguments, and environment variables. config map can be used to store fine-grained information like individual properties or coarse-grained information like entire configuration files or JSON blobs.
Configuration data can be consumed in pods in a variety of ways. A config map can be used to:
Populate environment variable values in containers
Set command-line arguments in a container
Populate configuration files in a volume
Users and system components can store configuration data in a config map.
A config map is similar to a secret, but designed to more conveniently support working with strings that do not contain sensitive information.
https://www.youtube.com/watch?v=pspR_orNK1I
[https://www.tutorialworks.com/spring-boot-kubernetes-override-properties/](https://www.tutorialworks.com/spring-boot-kubernetes-override-properties/
[https://blog.jcore.com/2020/01/deploying-a-properties-file-next-to-your-jar-on-openshift/](https://blog.jcore.com/2020/01/deploying-a-properties-file-next-to-your-jar-on-openshift/
https://capgemini.github.io/engineering/externalising-spring-boot-config-with-kubernetes/
http://v1.uncontained.io/playbooks/app_dev/properties-management.html