DevOps Dictionary

Pulumi is an infrastructure as code tool that lets teams define and manage cloud resources using general-purpose programming languages like TypeScript, Python, Go, or C#. It addresses the problem of provisioning and updating infrastructure safely and repeatably across environments by turning desired state into deployable changes. At a high level, you write code that describes resources (such as networks, Kubernetes clusters, databases, and permissions), Pulumi computes a plan (the diff between current and desired state), and then applies it through cloud provider APIs while tracking state so updates are consistent and auditable.

With Pulumi, infrastructure changes can be reviewed, tested, versioned, and reused like application code; without it, teams often rely on manual console changes or fragmented scripts that drift over time and are harder to reproduce during incidents. This gap exists because imperative, one-off changes don’t preserve a reliable record of intent, while Pulumi keeps that intent in code and reconciles it against what’s actually deployed.