Which approach allows per-environment customization while reusing the same template or manifest?

Which approach allows per-environment customization while reusing the same template or manifest?

• A. Template parameters (and optionally environment-specific ConfigMaps).
• B. Copy and modify per environment.
• C. Hard-code values in the template.
• D. Use separate manifests per environment.

Answer: (A)

Template parameterization lets you reuse the same manifest across environments by substituting different values at deploy time. You define placeholders (parameters) in the template and supply environment-specific values when you instantiate it, so the same template renders differently per environment. If configuration data varies by environment, you can reference environment-specific ConfigMaps from the template (or pass the ConfigMap name as a parameter), giving each environment its own config while keeping the template identical. This approach keeps a single source of truth, makes promotion between environments smooth, and avoids duplication. In contrast, hard-coding values or copying and modifying per environment creates drift and extra maintenance work, while separate manifests per environment fragment the reuse.

Template parameterization lets you reuse the same manifest across environments by substituting different values at deploy time. You define placeholders (parameters) in the template and supply environment-specific values when you instantiate it, so the same template renders differently per environment. If configuration data varies by environment, you can reference environment-specific ConfigMaps from the template (or pass the ConfigMap name as a parameter), giving each environment its own config while keeping the template identical. This approach keeps a single source of truth, makes promotion between environments smooth, and avoids duplication. In contrast, hard-coding values or copying and modifying per environment creates drift and extra maintenance work, while separate manifests per environment fragment the reuse.