Puppet

Configuration Management

The practice of systematically managing and maintaining the consistency of system configurations.

Ansible

An open-source automation tool for configuration management, application deployment, and task automation.

Chef

A configuration management tool using Ruby-based scripts to automate infrastructure setup and maintenance.

Immutable Infrastructure

An approach where infrastructure components are never modified after deployment but replaced entirely with updated versions.

GitOps

An operational framework using Git repositories as the single source of truth for declarative infrastructure and applications.

The continuous observation of system performance, availability, and health using automated tools and dashboards.

The process of automating the compilation, testing, and packaging of software applications.

The practice of securely storing, accessing, and managing sensitive credentials, API keys, and certificates.

The average time between system failures, measuring reliability and availability.

An organisational approach where incident reviews focus on systemic improvements rather than individual blame.

A set of practices combining software development and IT operations to shorten the development lifecycle and deliver continuous value.

A design approach where a system continues to operate with reduced functionality when components fail.

A quantitative measure of some aspect of the level of service being provided.