https://github.com/arska/chaosbutton

https://github.com/arska/chaosbutton

Last synced: 1 day ago
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• Host: GitHub
• URL: https://github.com/arska/chaosbutton
• Owner: arska
• Created: 2019-02-21T19:59:40.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2024-05-22T06:24:36.000Z (6 months ago)
• Last Synced: 2024-05-22T08:55:45.147Z (6 months ago)
• Language: Python
• Size: 599 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 7
• Metadata Files:
  • Readme: README.md

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README

        
# Chaosbutton

![Chaosbutton in action](images/chaosbutton.jpg)

A large red button connected to a Raspberry Pi bringing chaos and mayhem to your

 kubernetes-based service by killing a pod by random

## How to create an OpenShift service account with a token that does not expire

```

oc create sa chaosbutton

oc policy add-role-to-user edit -z chaosbutton

oc describe sa chaosbutton | grep "Tokens:"

# get the secret name of the "Token"

oc describe secret chaosbutton-token-asd42 | grep "token:"

# copy the token and use below

```

## How to install on Raspberry Pi

```

curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

echo deb http://apt.kubernetes.io/ kubernetes-stretch main > /etc/apt/sources.list.d/kubernetes.list

apt-get update

apt-get install git python3-pip kubectl

pip3 install RPi.GPIO kubernetes

git clone https://github.com/arska/chaosbutton.git

cd chaosbutton

kubectl config set-cluster appuio --server='https://api.cloudscale-lpg-2.appuio.cloud:6443'

kubectl config set-credentials appuio --token='kjhbmjhvbnbvnbv' # get a valid token e.g. above

kubectl config set-context appuio --cluster=appuio --user=appuio

kubectl config use-context appuio

python3 app.py

```

# To install the systemd service to start at boot

```

cp chaosbutton.service /lib/systemd/system/

sudo systemctl daemon-reload

sudo systemctl enable chaosbutton.service

```

# How to I configure which pod gets killed?

See "namespace" and "selector" constants in app.py.

namespace: the Kubernetes namespace (orr OpenShift project) name you want to operate in

selector: is the `label=value` from which one pod is selected by random, used as a

 filter to query the Kubernetes API

# How do I build the Button and the Raspberry pi?

I ordered my button locally in Switzerland from https://www.bastelgarage.ch/buzzer-taster-rot because it was the cheapest delivered to me.

By default this application uses pin 15 (see "channel" in app.py) on the raspberry pi

 IO header because pin 17 next to it has +3.3v power. connecting these to pins

  together using the button is used as a trigger to kill one pod.