Configuration management is a central element of Kubernetes deployments, as it ensures repeatable, predictable, and secure runtime environments. Declarative configuration files, typically written in YAML or JSON, define the desired state of applications, services, and infrastructure. This automated approach helps to standardize deployments and maintain consistency across multiple environments.

Secrets and configuration maps are commonly used to manage sensitive information and runtime settings. These resources can be updated independently of application code, reducing coordination challenges during deployments. By externalizing configuration, teams can modify application behavior without rebuilding or redeploying the application image.
Version control of configuration files is another key consideration. Storing deployment files in a repository enables tracking changes, auditing updates, and enabling rollbacks. Policies and processes for reviewing configuration changes may help to minimize accidental service interruptions or exposure of sensitive data.
Parameterization through environment variables and templating tools, such as Helm or Kustomize, provides flexibility for deploying the same application to multiple environments with customized settings. This aids in maintaining a consistent deployment process, reducing manual error, and supporting scaling objectives as environments grow in complexity.