Chaos Toolkit Kubernetes Support

This project contains activities, such as probes and actions, you can call from your experiment through the Chaos Toolkit.

Install

To be used from your experiment, this package must be installed in the Python environment where chaostoolkit already lives.

$ pip install chaostoolkit-kubernetes

Usage

To use the probes and actions from this package, add the following to your experiment file:

{
    "name": "all-our-microservices-should-be-healthy",
    "provider": {
        "type": "python",
        "module": "chaosk8s.probes",
        "func": "microservice_available_and_healthy",
        "arguments": {
            "name": "myapp",
            "ns": "myns"
        }
    }
},
{
    "type": "action",
    "name": "terminate-db-pod",
    "provider": {
        "type": "python",
        "module": "chaosk8s.pod.actions",
        "func": "terminate_pods",
        "arguments": {
            "label_selector": "app=my-app",
            "name_pattern": "my-app-[0-9]$",
            "rand": true,
            "ns": "default"
        }
    },
    "pauses": {
        "after": 5
    }
}

That's it! Notice how the action gives you the way to kill one pod randomly.

Please explore the code to see existing probes and actions.

Discovery

You may use the Chaos Toolkit to discover the capabilities of this extension:

$ chaos discover chaostoolkit-kubernetes --no-install

Configuration

This extension to the Chaos Toolkit can use the Kubernetes configuration found at the usual place in your HOME directory under ~/.kube/. You can also pass the credentials via secrets as follows:

{
    "secrets": {
        "kubernetes": {
            "KUBERNETES_HOST": "http://somehost",
            "KUBERNETES_API_KEY": {
                "type": "env",
                "key": "SOME_ENV_VAR"
            }
        }
    }
}

Then in your probe or action:

{
    "name": "all-our-microservices-should-be-healthy",
    "provider": {
        "type": "python",
        "module": "chaosk8s.probes",
        "func": "microservice_available_and_healthy",
        "secrets": ["kubernetes"],
        "arguments": {
            "name": "myapp",
            "ns": "myns"
        }
    }
}

Contribute

If you wish to contribute more functions to this package, you are more than welcome to do so. Please fork this project, make your changes following the usual PEP 8 code style, add appropriate tests and submit a PR for review.