A service mesh intercepts all network traffic between microservices and manages cross-cutting concerns — encryption, retries, circuit breaking, distributed tracing — transparently, without requiring changes to application code. The Sidecar Pattern Most service meshes inject a lightweight proxy (typically Envoy) as a sidecar container alongside every service Pod. All inbound and outbound

FinOps (Financial Operations) is the discipline of applying financial accountability to the on-demand, variable-cost nature of cloud infrastructure. It combines culture, process, and tooling to ensure that cloud investment is visible, measured, and optimised continuously. The FinOps Lifecycle * Inform — Achieve full visibility: resource tagging, cost attribution, real-time dashboards, showback and

GitOps extends Infrastructure as Code by making a Git repository the canonical, immutable source for both application manifests and infrastructure configuration. A GitOps operator continuously compares the live system against the state declared in Git, automatically remediating any divergence. The Four Principles (OpenGitOps) 1. Declarative — Desired system state expressed in

Infrastructure as Code (IaC) treats servers, networks, databases, and load balancers as software: version-controlled, peer-reviewed, and deployed through automated pipelines. Instead of clicking through a cloud console, you declare the desired state of your infrastructure and let the tool calculate and apply the diff. Declarative vs Imperative Most modern IaC

Kubernetes (K8s) is an open-source system originally designed by Google, now maintained by the CNCF. It groups containers into logical units called Pods for easy management and service discovery. Core Architecture A cluster consists of a control plane (API server, scheduler, etcd, controller manager) and worker nodes that run Pods