options

Documentation

Overview

Package options provides functionality for adding options to components.

Options, in this context, are values that need to be added to components at runtime. Sometimes these are called 'last-mile' customizations. For example, you might want the Cluster IP or the Cluster Name to a specific value.

The parent options package provides common functionality and types while the subdirectories provide specific option-applying instances.

Index

• Constants
• func ApplyCommon(ref bundle.ComponentReference, objs []*unstructured.Unstructured, ...) ([]*unstructured.Unstructured, error)
• type Applier
• type JSONOptions
• type ObjHandler

Constants

const (
	// MissingKeyError is an option for go templates. Execution stops immediately
	// with an error. This is the used as the default in the ClusterBundle.
	MissingKeyError = "missingkey=error"

	// MissingKeyDefault is same as MissingKeyInvalid.
	MissingKeyDefault = "missingkey=default"

	// MissingKeyInvalid ihe default behavior: Do nothing and continue execution.
	// If printed, the result of the index operation is the string
	MissingKeyInvalid = "missingkey=invalid"

	// MissingKeyZero is an option for go templates. The operation returns the
	// zero value for the map type's element.
	MissingKeyZero = "missingkey=zero"
)

Functions

func ApplyCommon

func ApplyCommon(ref bundle.ComponentReference, objs []*unstructured.Unstructured, opts JSONOptions, objFn ObjHandler) ([]*unstructured.Unstructured, error)

ApplyCommon provides common functionality for applying options, deferring the specific object handling logic. The objects will be modified in-place; the caller should copy them if needed.

Types

type Applier

type Applier interface {
	// ApplyOptions applys options to some subset objects from the component. The
	// returned component should be copy of the original, with (perhaps) modifications made to the original.
	ApplyOptions(comp *bundle.Component, opts JSONOptions) (*bundle.Component, error)
}

Applier represents an object that can take options and apply them to components.

type JSONOptions

type JSONOptions map[string]interface{}

JSONOptions is an instance of options, represented as a JSON object encoded as map[string]interface{}. See more at the go docs for `encoding/json`.

type ObjHandler

type ObjHandler func(obj *unstructured.Unstructured, ref bundle.ComponentReference, opts JSONOptions) (*unstructured.Unstructured, error)

ObjHandler is a function that can apply options to a Kubernetes object.