Build Resilient Applications with Harness Resilience Testing Free Plan | Harness Blog

Harness Resilience Testing Free Plan is a hosted chaos engineering platform built on the CNCF’s open-source LitmusChaos project, offering free chaos experiments alongside enterprise capabilities such as role-based access control, hosted logging, centralized governance, and integration with Harness Continuous Delivery and Continuous Verification. It supports declarative, Git-based experiments across Kubernetes, cloud services, VMware, Linux, and Windows targets, using fault libraries, probes, service-level objectives, analytics, and observability tools to test whether applications maintain expected behavior during controlled failures. The recommended process involves defining a steady state and hypothesis, configuring an environment and chaos infrastructure, selecting a target, injecting a fault with a limited blast radius, and evaluating results against probes and resilience scores. A Kubernetes tutorial demonstrates deleting pods in an Online Boutique cart microservice while monitoring availability through Grafana and Prometheus; the application fails its HTTP availability probe and receives a zero resilience score because its sole cart pod becomes unavailable. The suggested remediation is to run at least two replicas so one pod remains available during the fault, illustrating how repeated experiments can identify weaknesses and improve application reliability.

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