Infrastructure as Code and GitOps Questions

Defining and managing infrastructure and delivery state declaratively: provisioning as code (Terraform, CloudFormation, Pulumi, Ansible, Puppet), configuration management, idempotency, drift detection and remediation, and version control for infrastructure definitions, extended by GitOps where git is the source of truth for deployment and infrastructure state. Covers keeping environments consistent, treating config as a first-class versioned artifact, pull-based deployment and continuous reconciliation toward the committed state (ArgoCD, Flux, and similar controllers), Kubernetes manifest and configuration delivery via git, secrets handling for IaC and GitOps pipelines, policy-as-code guardrails (OPA, Sentinel), Terraform state management and locking, and auditable change through version control: branching strategy, pull request review, commit conventions, and code review policy for infrastructure code. Distinct from the CI/CD pipeline design topic, which owns generic pipeline structure and platform-scale release orchestration (build, test, artifact publishing, runner mechanics) and the architectural choice between push-based CI/CD and pull-based GitOps, even when the payload is infrastructure code. Distinct from the safe deployment and rollback strategies topic, which owns deployment-strategy mechanics: canary and blue-green traffic shifting, automated rollback triggered by metrics or SLOs, feature-flag progressive delivery, Kubernetes rollout mechanics (maxSurge, maxUnavailable, health-check gating), and database or schema migration safety as it gates a release, even when the delivery mechanism is GitOps. Distinct from the automation and scripting topic, which owns operational-scripting disciplines (retry and backoff logic, CLI tool design, generic file, checksum, or diff utilities) when the task is not specifically about declarative infrastructure or configuration state. This topic keeps the GitOps reconciliation loop itself, drift detection and remediation, and IaC state and module lifecycle management regardless of which adjacent discipline a question also touches.