Configuration as code

As explained in Platform Engineering on Kubernetes

Configuration as code is the practice of representing system and application configuration in version-controlled, machine-readable files.

Configuration as code represents application and system configuration in machine-readable, versioned files. Kubernetes YAML resources describe application topology, connect services to containers, and define settings such as environment variables. section 2.5

Applied to Kubernetes deployments, configuration as code enables teams to:

• Package and version deployment configuration for creating application instances in different environments. section 2.5
• Use Helm templating to tune resource consumption and network configuration for a target environment. section 2.5
• Reuse the same Kubernetes APIs and resources across local and cloud-provider clusters. section 2.5

Figure 2.32 Applications’ lifecycle from building and packaging to running inside an environment

Trace the lifecycle from building and packaging an application to running it inside an environment. section 2.5

How Platform Engineering on Kubernetes covers it

How deep it goes

Explains topology, container links, environment variables, packaging, versioning, and Helm tuning, but stops before package production.

Examples

Uses Kubernetes resources, service environment variables, Helm charts, and local-to-cloud cluster deployment as examples.

What you can do after

Operate/configure application instances by versioning Kubernetes resources and tuning Helm templates for target clusters.

How it connects

Connects configuration as code with Kubernetes, Helm, platform engineering, continuous delivery, and environments.

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Also explained in

• 

  liveBookmanning.com
  Automating API DeliveryConfiguration as code is the management of application configuration through descriptive, version-controlled files.
• 

  liveBookmanning.com
  Kubernetes for DevelopersConfiguration as code is a practice of representing system configuration in files that are managed like source code.

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Related concepts

• versioninguses · The practice of identifying and managing successive revisions of files, data, models, interfaces, or other artifacts so changes can be tracked and earlier states recovered.
• Anthos Config Managementused by · Anthos Config Management is a Google Anthos component for centrally applying policy and configuration to clusters and services.
• code reviewuses · Code review is the systematic examination of source code or proposed changes to identify problems and assess or improve quality.
• repositoryuses · A software repository is an organized storage location or collection of project files and related artifacts, often managed with version history and change tracking.
• GitOpsequivalent to · GitOps is an operational approach that uses version-controlled declarative configuration as the source of truth and automation to apply or reconcile system state.

This explainer was generated by Manning's knowledge graph from the text of Platform Engineering on Kubernetes. The section links point to the parts of the book it draws on.