Extension `chaosservicefabric`¶


Version	0.2.0
Repository	https://github.com/chaostoolkit-incubator/chaostoolkit-service-fabric

This project is a collection of actions and probes, gathered as an extension to the Chaos Toolkit. It targets the Microsoft Service Fabric platform.

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-service-fabric

Usage¶

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

{
    "type": "action",
    "name": "start-service-factory-chaos",
    "provider": {
        "type": "python",
        "module": "chaosservicefabric.factory.actions",
        "func": "start_chaos",
        "secrets": ["azure"],
        "arguments": {
            "parameters": {
                "TimeToRunInSeconds": 45
            }
        }
    }
},
{
    "type": "action",
    "name": "stop-service-factory-chaos",
    "provider": {
        "type": "python",
        "module": "chaosservicefabric.factory.actions",
        "func": "stop_chaos",
        "secrets": ["azure"]
    }
}

The parameters are straight from the Service Fabric API.

That’s it!

Please explore the code to see existing probes and actions.

Configuration¶

Credentials¶

This extension uses the requests library under the hood. The requests library expects that you have a PFX certificate, converted as to the PEM format, that allows you to authenticate with the Service Factory endpoint.

Generally speaking, there are two ways of doing this:

you have created a configuration file where you will run the experiment from (so with a ~/.sfctl/config file)

you explicitly pass the correct environment variables to the experiment definition as follows:

Configuration section:

{
    "endpoint": "https://XYZ.westus.cloudapp.azure.com:19080",
    "verify_tls": false,
    "use_ca": false
}

Secrets section:

{
    "azure": {
        "security": "pem",
        "pem_path": "./cluster-client-cert.pem"
    }
}

The PEM can also be passed as an environment variable:

{
    "azure": {
        "security": "pem",
        "pem_content": {
            "type": "env",
            "key": "AZURE_PEM"
        }
    }
}

The environment variable name can be anything.

Putting it all together¶

Here is a full example:

{
    "version": "1.0.0",
    "title": "...",
    "description": "...",
    "configuration": {
        "endpoint": "https://XYZ.westus.cloudapp.azure.com:19080",
        "verify_tls": false,
        "use_ca": false
    },
    "secrets": {
        "azure": {
            "security": "pem",
            "pem_path": "./cluster-client-cert.pem"
        }
    },
    "steady-state-hypothesis": {
        "title": "Services is healthy",
        "probes": [
            {
                "type": "probe",
                "name": "application-must-respond",
                "tolerance": 200,
                "provider": {
                    "type": "http",
                    "verify_tls": false,
                    "url": "https://some-url-in-cluster/"
                }
            }
        ]
    },
    "method": [
        {
            "type": "action",
            "name": "start-service-factory-chaos",
            "provider": {
                "type": "python",
                "module": "chaosservicefabric.factory.actions",
                "func": "start_chaos",
                "secrets": ["azure"],
                "arguments": {
                    "parameters": {
                        "TimeToRunInSeconds": 45
                    }
                }
            },
            "pauses": {
                "after": 30
            }
        },
        {
            "type": "probe",
            "ref": "application-must-respond"
        },
        {
            "type": "action",
            "name": "stop-service-factory-chaos",
            "provider": {
                "type": "python",
                "module": "chaosservicefabric.factory.actions",
                "func": "stop_chaos",
                "secrets": ["azure"]
            },
            "pauses": {
                "after": 5
            }
        },
        {
            "type": "probe",
            "name": "get-service-factory-chaos-report",
            "provider": {
                "type": "python",
                "module": "chaosservicefabric.factory.probes",
                "func": "chaos_report",
                "secrets": ["azure"],
                "arguments": {
                    "start_time_utc": "1 minute ago",
                    "end_time_utc": "now"
                }
            }
        }
    ]
}

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

Exported Activities¶

cluster¶

`chaos_report`¶


Type	probe
Module	chaosservicefabric.cluster.probes
Name	chaos_report
Return	mapping

Get Chaos report using following the Service Fabric API:

https://docs.microsoft.com/en-us/rest/api/servicefabric/sfclient-model-chaosparameters

Please see the :func:chaosazure.fabric.auth help for more information on authenticating with the service.

Signature:

def chaos_report(timeout: int = 60,
                 start_time_utc: str = None,
                 end_time_utc: str = None,
                 configuration: Dict[str, Dict[str, str]] = None,
                 secrets: Dict[str, Dict[str, str]] = None) -> Dict[str, Any]:
    pass

Arguments:

Name	Type	Default	Required
timeout	integer	60	No
start_time_utc	string	null	No
end_time_utc	string	null	No

Usage:

JSONYAML

{
  "name": "chaos-report",
  "type": "probe",
  "provider": {
    "type": "python",
    "module": "chaosservicefabric.cluster.probes",
    "func": "chaos_report"
  }
}

name: chaos-report
provider:
  func: chaos_report
  module: chaosservicefabric.cluster.probes
  type: python
type: probe

`start_chaos`¶


Type	action
Module	chaosservicefabric.cluster.actions
Name	start_chaos
Return	mapping

Start Chaos in your cluster using the given parameters. This is a mapping of keys as declared in the Service Fabric API:

https://docs.microsoft.com/en-us/rest/api/servicefabric/sfclient-model-chaosparameters

Please see the :func:chaosservicefabric.fabric.auth help for more information on authenticating with the service.

Signature:

def start_chaos(parameters: Dict[str, Any],
                timeout: int = 60,
                configuration: Dict[str, Dict[str, str]] = None,
                secrets: Dict[str, Dict[str, str]] = None) -> Dict[str, Any]:
    pass

Arguments:

Name	Type	Default	Required
parameters	mapping		Yes
timeout	integer	60	No

Usage:

JSONYAML

{
  "name": "start-chaos",
  "type": "action",
  "provider": {
    "type": "python",
    "module": "chaosservicefabric.cluster.actions",
    "func": "start_chaos",
    "arguments": {
      "parameters": {}
    }
  }
}

name: start-chaos
provider:
  arguments:
    parameters: {}
  func: start_chaos
  module: chaosservicefabric.cluster.actions
  type: python
type: action

`stop_chaos`¶


Type	action
Module	chaosservicefabric.cluster.actions
Name	stop_chaos
Return	mapping

Stop Chaos in your cluster.

Please see the :func:chaosservicefabric.fabric.auth help for more information on authenticating with the service.

Signature:

def stop_chaos(timeout: int = 60,
               configuration: Dict[str, Dict[str, str]] = None,
               secrets: Dict[str, Dict[str, str]] = None) -> Dict[str, Any]:
    pass

Arguments:

Name	Type	Default	Required
timeout	integer	60	No

Usage:

JSONYAML

{
  "name": "stop-chaos",
  "type": "action",
  "provider": {
    "type": "python",
    "module": "chaosservicefabric.cluster.actions",
    "func": "stop_chaos"
  }
}

name: stop-chaos
provider:
  func: stop_chaos
  module: chaosservicefabric.cluster.actions
  type: python
type: action

Extension chaosservicefabric¶

Install¶

Usage¶

Configuration¶

Credentials¶

Putting it all together¶

Contribute¶

Develop¶

Test¶

Exported Activities¶

cluster¶

chaos_report¶

start_chaos¶

stop_chaos¶

Extension `chaosservicefabric`¶

`chaos_report`¶

`start_chaos`¶

`stop_chaos`¶