This project is a collection of actions and probes, gathered as an extension to the Chaos Toolkit. It targets the Microsoft Service Fabric platform.
This package requires Python 3.8+
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
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.cluster.actions",
"func": "start_chaos",
"secrets": ["azure"],
"arguments": {
"parameters": {
"TimeToRunInSeconds": 45
}
}
}
},
{
"type": "action",
"name": "stop-service-factory-chaos",
"provider": {
"type": "python",
"module": "chaosservicefabric.cluster.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.
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/configfile) -
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.
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.cluster.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.cluster.actions",
"func": "stop_chaos",
"secrets": ["azure"]
},
"pauses": {
"after": 5
}
},
{
"type": "probe",
"name": "get-service-factory-chaos-report",
"provider": {
"type": "python",
"module": "chaosservicefabric.cluster.probes",
"func": "chaos_report",
"secrets": ["azure"],
"arguments": {
"start_time_utc": "1 minute ago",
"end_time_utc": "now"
}
}
}
]
}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.
If you wish to develop on this project, make sure to install the development dependencies. Using pdm:
$ pdm install --devNow, you can edit the files and they will be automatically be seen by your
environment, even when running from the chaos command locally.
To run the tests for the project execute the following:
$ pdm run test
You can format and lint the code as follows:
$ pdm run format
$ pdm run lint
