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OpenStack ConfigDrive NetworkData json format
OpenStack network_data.json provides a 3 element dictionary
- "links" (links are network devices, physical or virtual)
- "networks" (networks are ip network configurations for one or more
links)
- services (non-ip services, like dns)
networks and links are combined via network items referencing specific
links via a 'link_id' which maps to a links 'id' field.
To convert this format to network_config yaml, we first iterate over the
links and then walk the network list to determine if any of the networks
utilize the current link; if so we generate a subnet entry for the device
We also need to map network_data.json fields to network_config fields. For
example, the network_data links 'id' field is equivalent to network_config
'name' field for devices. We apply more of this mapping to the various
link types that we encounter.
There are additional fields that are populated in the network_data.json
from OpenStack that are not relevant to network_config yaml, so we
enumerate a dictionary of valid keys for network_yaml and apply filtering
to drop these superflous keys from the network_config yaml.
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