transcript yaml based (https://github.com/openstack/openstack-helm-infra/blob/master/prometheus-alertmanager/values.yaml) to prometheus alert format

transcript-rules.py

from jinja2 import Environment
import yaml
import sys

RULE_TPL = """
ALERT {{ alert }}
  IF {{ expr }}
  FOR {{ for }}
  LABELS {
    severity="page"
  }
  ANNOTATIONS {
    SUMMARY = "{{ annotations.summary }}",
    DESCRIPTION = "{{ annotations.description }}"
  }
"""


def load_template(template, **data):
    return Environment().from_string(template).render(**data)


def main(component):
    with open("./values.yaml") as fd:
        config = yaml.load(fd.read())
        for name, config in config.get('conf').get('prometheus').get('rules').items():
            if name in component:
                rule_configs = config['groups'][0].get('rules')
                for rule in rule_configs:
                    print(load_template(RULE_TPL, **rule))

main(sys.argv[1:])