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DevOps Intermediate

What is Configuration Management?

The practice of systematically managing and maintaining consistent server configurations across infrastructure.

Configuration management ensures all servers in an environment are configured identically and consistently. Tools automate installing packages, managing files, setting up services, and applying security policies across hundreds of servers.

Popular tools include Ansible (agentless, YAML playbooks), Puppet (agent-based, declarative), Chef (agent-based, Ruby DSL), and Salt (fast, Python-based). These tools are idempotent — running the same configuration twice produces the same result.

Related Terms

Docker Compose
A tool for defining and running multi-container Docker applications using a YAML configuration file.
Rolling Update
A deployment strategy that gradually replaces old application instances with new ones, maintaining availability throughout.
Container Registry
A storage and distribution service for container images, similar to a package repository but for Docker images.
Blue-Green Deployment
A deployment strategy using two identical environments where traffic is switched from the old version to the new one instantly.
ArgoCD
A declarative GitOps continuous delivery tool for Kubernetes that automatically syncs cluster state with Git repositories.
Kubernetes ConfigMap
A Kubernetes object that stores non-sensitive configuration data as key-value pairs, injected into pods as environment variables or files.
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