Red Hat is an enterprise software company with an open source development model. Openshift is a family of containerization software products developed by Red Hat
We wanted to test the maturity of Red Hat Openshift Container Platform and layers on top of it using chaos testing. Following that, we decided to use Litmus for these reasons:
- It's an Open Source project
- It has a wide selection of experiments available
- It has a vibrant community
- There are frequent releases and it is well maintained
We consume a variety of Litmus experiments in a tool called Kraken, where we are able to test infrastructure components of OpenShift. Litmus experiments are deployed against a single Openshift cluster that runs on top of a variety of cloud providers and a baremetal server using libvirt/KVM. Each experiment consists of observing the behavior upon applying chaos to the underlying infrastucture of a running pod or node instance, and validating the results of the resiliency. The chaos we inject to the VMs that host the openshift nodes can vary from hogging up the CPU and memory to stressing the IO and network disruption at the node level, among others.
Being a cloud native solution, Litmus allows us to define our experiment and expectations in the chaosexperiment manifest and retrieve the results in the chaosresult object generated at runtime.
Its vast selection of experiments, periodic release cadence and a welcoming community were sufficient signals that ensured with Litmus we would achieve our goal.