Created
June 25, 2017 07:07
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Generate docker-compose.yml `services` entries dynamically with Python
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| #!/usr/bin/env python3 | |
| from __future__ import print_function | |
| try: | |
| from ruamel import yaml | |
| except ImportError: | |
| import yaml | |
| # Map a Docker Compose "service" name to its image. | |
| SERVICES = { | |
| 'client': 'ubuntu:14.04', | |
| '8u121-jre-alpine': 'openjdk:8u121-jre-alpine', | |
| '8u121-jre': 'openjdk:8u121-jre', | |
| } | |
| # docker-compose.yml skeleton to fill out using "service" entries above. | |
| COMPOSITION = {'services': {}, 'version': '3'} | |
| def servicize(name, image): | |
| '''Create a docker-compose.yml service-section entry. | |
| Params | |
| ====== | |
| name : str | |
| Name of the service. | |
| image : str | |
| Docker image to use (what your FROM line would contain). | |
| Returns | |
| ======= | |
| dict describing the service. A name starting with 'client' is special. | |
| ''' | |
| entry = {'command': ['/entrypoint.sh'], | |
| 'image': image, | |
| 'volumes': ['./entrypoint.sh:/entrypoint.sh:ro']} | |
| if not name.startswith('client'): | |
| entry['ports'] = ['9000', '9443'] | |
| entry['healthcheck'] = { | |
| 'test': 'curl --fail --insecure https://localhost:9443/'} | |
| entry['volumes'].append('./svc:/svc:ro') | |
| return entry | |
| if __name__ == '__main__': | |
| for name, image in SERVICES.items(): | |
| COMPOSITION['services'][name] = servicize(name, image) | |
| print(yaml.dump(COMPOSITION, default_flow_style=False, indent=4), end='') |
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