DevOps
Pulumi programs are real code — TypeScript, Python, Go — which means you can test them with standard testing frameworks. Pulumi's built-in mocking system lets you unit test your infrastructure definitions without deploying anything to the cloud. For end-to-end validation, Pulumi Automation API runs real deployments in
DevOps
Terraform modules can look correct but deploy broken or insecure infrastructure. Checkov catches security misconfigurations statically before a plan runs. Terratest deploys real infrastructure to validate it works end-to-end. Together, they give you a complete testing pyramid for Terraform: fast static checks in every PR, and real infrastructure
Testing
Railway has quietly become one of the most developer-friendly deployment platforms available. Its combination of instant deploys, automatic preview environments, and built-in service networking makes it compelling for teams that want to move fast. But "move fast" only works if you have a testing strategy that
Testing
Render has built its reputation on being the platform that just works — connect your repository, and Render handles builds, deploys, TLS, and scaling without requiring a deep infrastructure background. But "just works" for deployment doesn't mean "just works" for testing. Render's architecture
Testing
Fly.io has become a go-to platform for teams that want Heroku-style simplicity with genuine multi-region distribution. You push code, and Fly.io runs it close to your users in 30+ regions worldwide. But with that power comes a real testing challenge: how do you verify that
Testing
Coolify has emerged as the leading self-hosted alternative to platforms like Heroku and Render. It runs on your own servers — a single Hetzner VPS, a bare-metal box, or a small cluster — and gives you Heroku-style deployment workflows without the per-seat pricing or data sovereignty concerns. For
Testing
Pod Security Standards (PSS) replaced PodSecurityPolicy (PSP) in Kubernetes 1.25. They define three security levels for pods — Privileged, Baseline, and Restricted — and the Pod Security Admission (PSA) controller enforces them at the namespace level. But "enforces" only works if you actually test that your manifests comply. This
Testing
Runtime security is the last line of defense. If a container escapes, an attacker pivots laterally, or malware executes inside your cluster — Falco is what catches it. But Falco rules that go untested are rules that fail silently when it matters most. This guide covers how to write, validate, and
Testing
OPA Gatekeeper extends Kubernetes admission control with custom policies written in Rego. When a pod, service, or configmap is created or updated, Gatekeeper evaluates it against your policies and either admits or rejects the request. The problem is most teams write Gatekeeper policies without any tests, discovering failures only when
Testing
Mandatory Access Control (MAC) is what runs underneath discretionary permissions. Even if a process runs as root, AppArmor and SELinux can restrict which files it reads, which network ports it uses, and which capabilities it exercises. For containers, these are critical layers of defense-in-depth. The gap most teams
Background Jobs
Scheduled jobs and cron tasks are notoriously difficult to test. They run at specific times, interact with the real world (databases, APIs, files), and often involve time-sensitive logic. A monthly billing job that ran at 2:01 instead of 2:00 for a daylight saving transition can cause real
Testing
Unit tests verify that your Pulumi code produces the resources you intend. Policy-as-code verifies that those resources comply with organizational standards — encryption enabled, tags present, no public S3 buckets, required IAM conditions. Pulumi CrossGuard handles the second concern. CrossGuard policies run on every pulumi up and pulumi preview.