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Genericizes the yaml+environment versioned configuration parser

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Registry configuration parsing uses the new parser with a single version
declaration and an environment prefix of "REGISTRY"
This commit is contained in:
Brian Bland 2014-12-17 14:18:58 -08:00
parent 454d4e918a
commit f9b119974d
4 changed files with 274 additions and 149 deletions
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configuration/README.md
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@ -68,6 +68,6 @@ Any configuration field other than version can be replaced by providing an envir
For example, to change the loglevel to `error`, one can provide `REGISTRY_LOGLEVEL=error`, and to change the s3 storage driver's region parameter to `us-west-1`, one can provide `REGISTRY_STORAGE_S3_LOGLEVEL=us-west-1`.
### Notes
If an environment variable changes a map value into a string, such as replacing the storage driver type with `REGISTRY_STORAGE=filesystem`, then all sub-fields will be erased. As such, changing the storage type will remove all parameters related to the old storage type.
If an environment variable changes a map value into a string, such as replacing the storage driver type with `REGISTRY_STORAGE=filesystem`, then all sub-fields will be erased. As such, specifying the storage type in the environment will remove all parameters related to the old storage configuration.
By restricting all keys in the configuration file to lowercase letters and numbers, we can avoid any potential environment variable mapping ambiguity.