A ConfigMap volume exposes ConfigMap data to a container as read-only files. Store key-value settings or complete configuration files in one place, then mount them where an application expects them. section 9.1.1
Use a ConfigMap volume when you need to:
- Provide files such as my.cnf, httpd.conf, or redis.conf without rebuilding the container image. section 9.1.1
- Define configuration once and reference it from multiple Kubernetes objects. section 9.1.1
- Mount configuration for an existing public image at the path where its application expects the file. section 9.1.1

