e1853a7d5b
Adds a new svc-map element which can be used to install services based on an in element 'svc-map' YAML config file format. This change is intended to decouple elements from DIB and allow new elements to support multiple distributions (with various service naming schemes) without having to constantly maintain DIB's various bin/map-services files. This patch ensures all of the YAML files are compiled into a single file without namespaces. The YAML compilation process occurs during image creation time and errors if conflicting mappings are found. Change-Id: Id11433ea342aace71a358936a7ca3151ec11d506
71 lines
2.3 KiB
Python
Executable File
71 lines
2.3 KiB
Python
Executable File
#!/usr/bin/env python
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import os
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import sys
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import yaml
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def os_family(distro):
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"""Given a distribution, returns a operating system family."""
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family = None
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if distro in ['centos', 'fedora', 'rhel', 'rhel7']:
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family = 'redhat'
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elif distro in ['debian', 'ubuntu']:
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family = 'debian'
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elif distro == 'opensuse':
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family = 'suse'
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return family
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def merge_data(source, destination, distro):
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"""Merges two dictionaries and filters on distro, family, or default
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(in order)."""
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result = dict()
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result.update(destination)
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family = os_family(distro)
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for servicename, mapping in source.iteritems():
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if servicename in result:
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raise Exception("%s already found in services list" % servicename)
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if distro in mapping:
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result[servicename] = mapping.get(distro)
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elif family in mapping:
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result[servicename] = mapping.get(family)
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elif 'default' in mapping:
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result[servicename] = mapping.get('default')
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else:
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result[servicename] = servicename
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return result
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def write_data_to_file(data, service_file_path):
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"""Writes yaml data to a specified path."""
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with open(service_file_path, 'w') as destination:
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yaml.dump(data, destination, default_flow_style=False)
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def main():
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elements = os.environ.get("IMAGE_ELEMENT").split(' ')
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element_paths = os.environ.get("ELEMENTS_PATH").split(':')
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service_names = dict()
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for element in elements:
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for element_path in element_paths:
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data_path = os.path.join(element_path, element, "svc-map")
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if os.path.exists(data_path):
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with open(data_path, 'r') as dataFile:
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data = yaml.load(dataFile.read())
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try:
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service_names = merge_data(
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data,
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service_names,
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os.environ.get("DISTRO_NAME"))
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except Exception as err:
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print("%s. Check %s for duplicate \
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service name." % (err, element))
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sys.exit(1)
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write_data_to_file(service_names, os.path.join("/tmp", 'svc-map-services'))
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if __name__ == "__main__":
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main()
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