Chaos Toolkit Driver for Spring Chaos.

This project is a collection of actions and probes, gathered as an extension to the Chaos Toolkit.

Install

This package requires Python 3.5+

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

$ pip install -U chaostoolkit-spring

Usage

Currently this driver supports interactions with a Spring Boot-based service that has included the 2.0.0.-SNAPSHOT release of the Chaos Monkey for Spring Boot. This snapshot includes the necessary Spring Boot Actuator HTTP endpoints so that the Chaos Toolkit to interact with the chaos features at runtime.

Once you have added the Chaos Monkey for Spring Boot and enabled the Spring Boot Actuator HTTP endpoints you can then use the probes and actions from this driver.

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

{
    "name": "enable_chaosmonkey",
    "provider": {
        "arguments": {
            "base_url": "http://localhost:8080/actuator"
        },
        "func": "enable_chaosmonkey",
        "module": "chaosspring.actions",
        "type": "python"
    },
    "type": "action"
}

This will interact with the specified service and enable the Chaos Monkey features. You can also turn off the Chaos Monkey if you wish by specifying the following action:

{
    "name": "disable_chaosmonkey",
    "provider": {
        "arguments": {
            "base_url": "http://localhost:8080/actuator"
        },
        "func": "disable_chaosmonkey",
        "module": "chaosspring.actions",
        "type": "python"
    },
    "type": "action"
}

You can then manipulate the Chaos Monkey assaults active on your service by specifing the following action:

{
    "name": "configure_assaults",
    "provider": {
        "arguments": {
            "base_url": "http://localhost:8080/actuator",
            "assaults_configuration": {
                "level": 5,
                "latencyRangeStart": 2000,
                "latencyRangeEnd": 5000,
                "latencyActive": false,
                "exceptionsActive": false,
                "killApplicationActive": true,
                "restartApplicationActive": false
            }
        },
        "func": "change_assaults_configuration",
        "module": "chaosspring.actions",
        "type": "python"
    },
    "type": "action"
}

That's it!

Please explore the code to use further probes and actions.

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, sprinkling with tests and submit a PR for review.

The Chaos Toolkit projects require all contributors must sign a Developer Certificate of Origin on each commit they would like to merge into the master branch of the repository. Please, make sure you can abide by the rules of the DCO before submitting a PR.

Develop

If you wish to develop on this project, make sure to install the development dependencies. But first, create a virtual environment and then install those dependencies.

$ pip install -r requirements-dev.txt -r requirements.txt

Then, point your environment to this directory:

$ python setup.py develop

Now, you can edit the files and they will be automatically be seen by your environment, even when running from the chaos command locally.

Test

To run the tests for the project execute the following:

$ pytest