author

Documentation

Overview

Package author contains a standard set of schemas for component authors to generate common core BuildPlans.

Holos values stability, flexibility, and composition. This package intentionally defines only the minimal necessary set of structures. Component authors are encouraged to define their own structures building on our example topics.

The Holos Maintainers may add definitions to this package if the community identifies nearly all users must define the exact same structure. Otherwise, definitions should be added as a customizable example in topics.

For example, structures representing a cluster and environment almost always need to be defined. Their definition varies from one organization to the next. Therefore, customizable definitions for a cluster and environment are best maintained in topics, not standardized in this package.

Index

• type ComponentConfig
• type Helm
• type Kubernetes
• type Kustomize
• type KustomizeConfig
• type NameLabel
• type Platform

Types

type ComponentConfig

type ComponentConfig struct {
	// Name represents the BuildPlan metadata.name field.  Used to construct the
	// fully rendered manifest file path.
	Name string
	// Path represents the path to the component producing the BuildPlan.
	Path string
	// Parameters are useful to reuse a component with various parameters.
	// Injected as CUE @tag variables.  Parameters with a "holos_" prefix are
	// reserved for use by the Holos Authors.
	Parameters map[string]string
	// OutputBaseDir represents the output base directory used when assembling
	// artifacts.  Useful to organize components by clusters or other parameters.
	// For example, holos writes resource manifests to
	// {WriteTo}/{OutputBaseDir}/components/{Name}/{Name}.gen.yaml
	OutputBaseDir string `cue:"string | *\"\""`

	// Resources represents kubernetes resources mixed into the rendered manifest.
	Resources core.Resources
	// KustomizeConfig represents the configuration kustomize.
	KustomizeConfig KustomizeConfig
	// Artifacts represents additional artifacts to mix in.  Useful for adding
	// GitOps resources.  Each Artifact is unified without modification into the
	// BuildPlan.
	Artifacts map[NameLabel]core.Artifact
}

ComponentConfig represents the configuration common to all kinds of components for use with the holos render component command. All component kinds may be transformed with kustomize configured with the KustomizeConfig field.

• Helm charts.
• Kubernetes resources generated from CUE.
• Kustomize bases.

type Helm

type Helm struct {
	ComponentConfig `json:",inline"`

	// Chart represents a Helm chart.
	Chart core.Chart
	// Values represents data to marshal into a values.yaml for helm.
	Values core.Values
	// EnableHooks enables helm hooks when executing the `helm template` command.
	EnableHooks bool `cue:"true | *false"`
	// Namespace sets the helm chart namespace flag if provided.
	Namespace string `json:",omitempty"`

	// BuildPlan represents the derived BuildPlan produced for the holos render
	// component command.
	BuildPlan core.BuildPlan
}

Helm assembles a BuildPlan rendering a helm chart. Useful to mix in additional resources from CUE and transform the helm output with kustomize.

type Kubernetes

type Kubernetes struct {
	ComponentConfig `json:",inline"`

	// BuildPlan represents the derived BuildPlan produced for the holos render
	// component command.
	BuildPlan core.BuildPlan
}

Kubernetes assembles a BuildPlan containing inline resources exported from CUE.

type Kustomize

type Kustomize struct {
	ComponentConfig `json:",inline"`

	// BuildPlan represents the derived BuildPlan produced for the holos render
	// component command.
	BuildPlan core.BuildPlan
}

Kustomize assembles a BuildPlan rendering manifests from a kustomize kustomization.

type KustomizeConfig

type KustomizeConfig struct {
	// Kustomization represents the kustomization used to transform resources.
	// Note the resources field is internally managed from the Files and Resources fields.
	Kustomization map[string]any `json:",omitempty"`
	// Files represents files to copy from the component directory for kustomization.
	Files map[string]struct{ Source string } `cue:"{[NAME=_]: Source: NAME}"`
	// Resources represents additional entries to included in the resources list.
	Resources map[string]struct{ Source string } `cue:"{[NAME=_]: Source: NAME}"`
	// CommonLabels represents common labels added without including selectors.
	CommonLabels map[string]string
}

KustomizeConfig represents the configuration for kustomize post processing. Use the Files field to mix in plain manifest files located in the component directory. Use the Resources field to mix in manifests from network urls.

type NameLabel

type NameLabel string

NameLabel represents the common use case of converting a struct to a list where the name field of each value unifies with the field name of the outer struct.

For example:

S: [NameLabel=string]: name: NameLabel
S: jeff: _
S: gary: _
S: nate: _
L: [for x in S {x}]
// L is [{name: "jeff"}, {name: "gary"}, {name: "nate"}]

type Platform

type Platform struct {
	Name       string
	Components map[NameLabel]core.Component
	Resource   core.Platform
}

Platform assembles a core Platform in the Resource field for the holos render platform command. Use the Components field to register components with the platform.