kubeconform vs Test Kitchen

Kubeconform is a command-line tool for validating Kubernetes manifests before deployment. It checks files against Kubernetes OpenAPI specifications, helping catch configuration problems before they reach a cluster. Validation and schema downloads run concurrently, and downloaded files are cached in memory. By default, it uses a self-updating fork of the Kubernetes JSON schema registry to supply schemas for recent Kubernetes versions. For custom resources, users can point it to local or remote schemas; local schemas also make offline validation possible. Results can be produced as JSON, JUnit, TAP, or plain text. Documentation describes using its Docker images in GitHub Actions and GitLab CI, and the images are published to GitHub Container Registry. It is free, with a listed plan of free. Installation instructions cover Linux, macOS through Homebrew, and Windows. Its checks do not cover additional server-side validation, and its Go module interface is still work in progress and unstable.

Test Kitchen is a free test harness for running infrastructure code in isolation on one or more platforms. Its workflow uses create, converge, setup, verify, and destroy commands to provision environments and test infrastructure code. Documented drivers cover Amazon EC2, Apache CloudStack, DigitalOcean, Docker through Dokken, Google Cloud Platform, Hetzner Cloud, Vagrant, Azure, Hyper-V, OpenStack, and VMware products. Which drivers are available depends on the driver gems installed in the Ruby environment. Provisioning options include Chef Infra, Cinc Client, Habitat, PowerShell DSC, and shell scripts; listed verification integrations include Cinc Auditor, Chef InSpec, and Serverspec. Community plugins add Ansible, Puppet, and Salt provisioners. Installation is available through RubyGems, system packages, or Cinc Workstation, but Test Kitchen itself does not bundle Cinc or Chef tooling. Requirements include a 64-bit operating system and enabled CPU virtualization. The project uses Apache License 2.0 and points users to Chef Community Slack for community assistance. The documentation notes known issues and no current maintainer for kitchen-docker, recommending kitchen-dokken instead.