81 lines
2 KiB
Python
81 lines
2 KiB
Python
"""
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Present observational weather data to Prometheus
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"""
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import json
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import os
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from typing import Dict, List
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import requests # type: ignore
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from flask import Flask, Response # type: ignore
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app = Flask(__name__)
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def fetch_carbon_data(postcode: str) -> Dict:
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"""
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Fetch current data for the carbon intensity of the provided region
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"""
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obs_data = requests.get(
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f'https://api.carbonintensity.org.uk/regional/postcode/{postcode}'
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)
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return json.loads(obs_data.content)
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@app.route('/metrics')
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def metrics():
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"""
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Output Prometheus-style metrics
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"""
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postcode = os.environ.get('CARBON_POSTCODE')
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latest_data = fetch_carbon_data(postcode)['data'][0]
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ret_data: List = list()
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for generation in latest_data['data'][0]['generationmix']:
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ret_data.append(
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{
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'key': f'sensor_carbon_generation_perc',
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'labels': {
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'fuel': generation['fuel'],
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'region': latest_data['dnoregion'],
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},
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'type': 'gauge',
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'value': float(generation['perc'])
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}
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)
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ret_data.append(
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{
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'key': 'sensor_carbon_intensity_forecast',
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'labels': {
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'region': latest_data['dnoregion'],
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},
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'type': 'gauge',
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'value': float(latest_data['data'][0]['intensity']['forecast']),
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}
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)
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ret_strs = list()
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for item in ret_data:
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ret_strs.append(f'# HELP {item["key"]} Carbon metric')
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ret_strs.append(f'# TYPE {item["key"]} {item["type"]}')
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ret_strs.append(
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item["key"]
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+ '{'
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+ " ".join([f'{key}="{val}"' for key, val in item["labels"].items()])
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+ '} '
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+ str(item["value"])
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)
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resp = Response('\n'.join(ret_strs))
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resp.headers['Content-type'] = 'text/plain'
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return resp
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if __name__ == '__main__':
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app.run(host='0.0.0.0')
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