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66 lines
2.1 KiB
Markdown
66 lines
2.1 KiB
Markdown
# Configuration IO API Semantics
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Resource Configuration may be read / written from / to sources such as directories,
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stdin|out or network. Tools may be composed using pipes such that the tools writing
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Resource Configuration may be a different tool from the one that read the configuration.
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In order for tools to be composed in this way, while preserving origin information --
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such as the original file, index, etc.:
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Tools **SHOULD** insert the following annotations when reading from sources,
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and **SHOULD** delete the annotations when writing to sinks.
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### `config.kubernetes.io/path`
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Records the slash-delimited, OS-agnostic, relative file path to a Resource.
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This annotation **SHOULD** be set when reading Resources from files.
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It **SHOULD** be unset when writing Resources to files.
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When writing Resources to a directory, the Resource **SHOULD** be written to the corresponding
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path relative to that directory.
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Example:
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```yaml
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metadata:
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annotations:
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config.kubernetes.io/path: "relative/file/path.yaml"
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```
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### `config.kubernetes.io/index`
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Records the index of a Resource in file. In a multi-object YAML file, Resources are separated
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by three dashes (`---`), and the index represents the position of the Resource starting from zero.
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This annotation **SHOULD** be set when reading Resources from files.
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It **SHOULD** be unset when writing Resources to files.
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When writing multiple Resources to the same file, the Resource **SHOULD** be written in the
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relative order matching the index.
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When this annotation is not specified, it implies a value of `0`.
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Example:
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```yaml
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metadata:
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annotations:
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config.kubernetes.io/path: "relative/file/path.yaml"
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config.kubernetes.io/index: 2
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```
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This represents the third Resource in the file.
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### `config.kubernetes.io/local-config`
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`config.kubernetes.io/local-config` declares that the configuration is to local tools
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rather than a remote Resource. e.g. The `Kustomization` config in a `kustomization.yaml`
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**SHOULD** contain this annotation so that tools know it is not intended to be sent to
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the Kubernetes api server.
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Example:
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```yaml
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metadata:
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annotations:
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config.kubernetes.io/local-config: "true"
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```
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