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registry.go
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// SPDX-FileCopyrightText: 2023 The Crossplane Authors <https://crossplane.io>
//
// SPDX-License-Identifier: Apache-2.0
package migration
import (
"regexp"
"github.com/crossplane/crossplane-runtime/pkg/resource"
xpv1 "github.com/crossplane/crossplane/apis/apiextensions/v1"
xpmetav1 "github.com/crossplane/crossplane/apis/pkg/meta/v1"
xpmetav1alpha1 "github.com/crossplane/crossplane/apis/pkg/meta/v1alpha1"
xppkgv1 "github.com/crossplane/crossplane/apis/pkg/v1"
xppkgv1beta1 "github.com/crossplane/crossplane/apis/pkg/v1beta1"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
)
var (
// AllCompositions matches all v1.Composition names.
AllCompositions = regexp.MustCompile(`.*`)
// AllConfigurations matches all metav1.Configuration names.
AllConfigurations = regexp.MustCompile(`.*`)
// CrossplaneLockName is the Crossplane package lock's `metadata.name`
CrossplaneLockName = regexp.MustCompile(`^lock$`)
)
const (
errAddToScheme = "failed to register types with the registry's scheme"
errFmtNewObject = "failed to instantiate a new runtime.Object using runtime.Scheme for: %s"
errFmtNotManagedResource = "specified GVK does not belong to a managed resource: %s"
)
type patchSetConverter struct {
// re is the regular expression against which a Composition's name
// will be matched to determine whether the conversion function
// will be invoked.
re *regexp.Regexp
// converter is the PatchSetConverter to be run on the Composition's
// patch sets.
converter PatchSetConverter
}
type configurationMetadataConverter struct {
// re is the regular expression against which a Configuration's name
// will be matched to determine whether the conversion function
// will be invoked.
re *regexp.Regexp
// converter is the ConfigurationMetadataConverter to be run on the Configuration's
// metadata.
converter ConfigurationMetadataConverter
}
type configurationPackageConverter struct {
// re is the regular expression against which a Configuration package's
// reference will be matched to determine whether the conversion function
// will be invoked.
re *regexp.Regexp
// converter is the ConfigurationPackageConverter to be run on the
// Configuration package.
converter ConfigurationPackageConverter
}
type providerPackageConverter struct {
// re is the regular expression against which a Provider package's
// reference will be matched to determine whether the conversion function
// will be invoked.
re *regexp.Regexp
// converter is the ProviderPackageConverter to be run on the
// Provider package.
converter ProviderPackageConverter
}
type packageLockConverter struct {
// re is the regular expression against which a package Lock's name
// will be matched to determine whether the conversion function
// will be invoked.
re *regexp.Regexp
// converter is the PackageLockConverter to be run on the package Lock.
converter PackageLockConverter
}
// Registry is a registry of `migration.Converter`s keyed with
// the associated `schema.GroupVersionKind`s and an associated
// runtime.Scheme with which the corresponding types are registered.
type Registry struct {
unstructuredPreProcessors map[Category][]UnstructuredPreProcessor
resourcePreProcessors []ManagedPreProcessor
resourceConverters map[schema.GroupVersionKind]ResourceConverter
templateConverters map[schema.GroupVersionKind]ComposedTemplateConverter
patchSetConverters []patchSetConverter
configurationMetaConverters []configurationMetadataConverter
configurationPackageConverters []configurationPackageConverter
providerPackageConverters []providerPackageConverter
packageLockConverters []packageLockConverter
categoricalConverters map[Category][]CategoricalConverter
scheme *runtime.Scheme
claimTypes []schema.GroupVersionKind
compositeTypes []schema.GroupVersionKind
}
// NewRegistry returns a new Registry initialized with
// the specified runtime.Scheme.
func NewRegistry(scheme *runtime.Scheme) *Registry {
return &Registry{
resourceConverters: make(map[schema.GroupVersionKind]ResourceConverter),
templateConverters: make(map[schema.GroupVersionKind]ComposedTemplateConverter),
categoricalConverters: make(map[Category][]CategoricalConverter),
unstructuredPreProcessors: make(map[Category][]UnstructuredPreProcessor),
scheme: scheme,
}
}
// make sure a converter is being registered for a managed resource,
// and it's registered with our runtime scheme.
// This will be needed, during runtime, for properly converting resources.
func (r *Registry) assertManagedResource(gvk schema.GroupVersionKind) {
obj, err := r.scheme.New(gvk)
if err != nil {
panic(errors.Wrapf(err, errFmtNewObject, gvk))
}
if _, ok := obj.(resource.Managed); !ok {
panic(errors.Errorf(errFmtNotManagedResource, gvk))
}
}
// RegisterResourceConverter registers the specified ResourceConverter
// for the specified GVK with this Registry.
func (r *Registry) RegisterResourceConverter(gvk schema.GroupVersionKind, conv ResourceConverter) {
r.assertManagedResource(gvk)
r.resourceConverters[gvk] = conv
}
// RegisterTemplateConverter registers the specified ComposedTemplateConverter
// for the specified GVK with this Registry.
func (r *Registry) RegisterTemplateConverter(gvk schema.GroupVersionKind, conv ComposedTemplateConverter) {
r.assertManagedResource(gvk)
r.templateConverters[gvk] = conv
}
// RegisterCompositionConverter is a convenience method for registering both
// a ResourceConverter and a ComposedTemplateConverter that act on the same
// managed resource kind and are implemented by the same type.
func (r *Registry) RegisterCompositionConverter(gvk schema.GroupVersionKind, conv CompositionConverter) {
r.RegisterResourceConverter(gvk, conv)
r.RegisterTemplateConverter(gvk, conv)
}
// RegisterPatchSetConverter registers the given PatchSetConverter for
// the compositions whose name match the given regular expression.
func (r *Registry) RegisterPatchSetConverter(re *regexp.Regexp, psConv PatchSetConverter) {
r.patchSetConverters = append(r.patchSetConverters, patchSetConverter{
re: re,
converter: psConv,
})
}
// RegisterConfigurationMetadataConverter registers the given ConfigurationMetadataConverter
// for the configurations whose name match the given regular expression.
func (r *Registry) RegisterConfigurationMetadataConverter(re *regexp.Regexp, confConv ConfigurationMetadataConverter) {
r.configurationMetaConverters = append(r.configurationMetaConverters, configurationMetadataConverter{
re: re,
converter: confConv,
})
}
// RegisterConfigurationMetadataV1ConversionFunction registers the specified
// ConfigurationMetadataV1ConversionFn for the v1 configurations whose name match
// the given regular expression.
func (r *Registry) RegisterConfigurationMetadataV1ConversionFunction(re *regexp.Regexp, confConversionFn ConfigurationMetadataV1ConversionFn) {
r.RegisterConfigurationMetadataConverter(re, &delegatingConverter{
confMetaV1Fn: confConversionFn,
})
}
// RegisterConfigurationMetadataV1Alpha1ConversionFunction registers the specified
// ConfigurationMetadataV1Alpha1ConversionFn for the v1alpha1 configurations
// whose name match the given regular expression.
func (r *Registry) RegisterConfigurationMetadataV1Alpha1ConversionFunction(re *regexp.Regexp, confConversionFn ConfigurationMetadataV1Alpha1ConversionFn) {
r.RegisterConfigurationMetadataConverter(re, &delegatingConverter{
confMetaV1Alpha1Fn: confConversionFn,
})
}
// RegisterConfigurationPackageConverter registers the specified
// ConfigurationPackageConverter for the Configuration v1 packages whose reference
// match the given regular expression.
func (r *Registry) RegisterConfigurationPackageConverter(re *regexp.Regexp, pkgConv ConfigurationPackageConverter) {
r.configurationPackageConverters = append(r.configurationPackageConverters, configurationPackageConverter{
re: re,
converter: pkgConv,
})
}
// RegisterConfigurationPackageV1ConversionFunction registers the specified
// ConfigurationPackageV1ConversionFn for the Configuration v1 packages whose reference
// match the given regular expression.
func (r *Registry) RegisterConfigurationPackageV1ConversionFunction(re *regexp.Regexp, confConversionFn ConfigurationPackageV1ConversionFn) {
r.RegisterConfigurationPackageConverter(re, &delegatingConverter{
confPackageV1Fn: confConversionFn,
})
}
// RegisterProviderPackageConverter registers the given ProviderPackageConverter
// for the provider packages whose references match the given regular expression.
func (r *Registry) RegisterProviderPackageConverter(re *regexp.Regexp, pkgConv ProviderPackageConverter) {
r.providerPackageConverters = append(r.providerPackageConverters, providerPackageConverter{
re: re,
converter: pkgConv,
})
}
// RegisterProviderPackageV1ConversionFunction registers the specified
// ProviderPackageV1ConversionFn for the provider v1 packages whose reference
// match the given regular expression.
func (r *Registry) RegisterProviderPackageV1ConversionFunction(re *regexp.Regexp, pkgConversionFn ProviderPackageV1ConversionFn) {
r.RegisterProviderPackageConverter(re, &delegatingConverter{
providerPackageV1Fn: pkgConversionFn,
})
}
// RegisterPackageLockConverter registers the given PackageLockConverter.
func (r *Registry) RegisterPackageLockConverter(re *regexp.Regexp, lockConv PackageLockConverter) {
r.packageLockConverters = append(r.packageLockConverters, packageLockConverter{
re: re,
converter: lockConv,
})
}
// RegisterCategoricalConverter registers the specified CategoricalConverter
// for the specified Category of resources.
func (r *Registry) RegisterCategoricalConverter(c Category, converter CategoricalConverter) {
r.categoricalConverters[c] = append(r.categoricalConverters[c], converter)
}
// RegisterCategoricalConverterFunction registers the specified
// CategoricalConverterFunctionFn for the specified Category.
func (r *Registry) RegisterCategoricalConverterFunction(c Category, converterFn CategoricalConverterFunctionFn) {
r.RegisterCategoricalConverter(c, &delegatingConverter{
categoricalConverterFn: converterFn,
})
}
// RegisterPackageLockV1Beta1ConversionFunction registers the specified
// RegisterPackageLockV1Beta1ConversionFunction for the package v1beta1 locks.
func (r *Registry) RegisterPackageLockV1Beta1ConversionFunction(re *regexp.Regexp, lockConversionFn PackageLockV1Beta1ConversionFn) {
r.RegisterPackageLockConverter(re, &delegatingConverter{
packageLockV1Beta1Fn: lockConversionFn,
})
}
// AddToScheme registers types with this Registry's runtime.Scheme
func (r *Registry) AddToScheme(sb func(scheme *runtime.Scheme) error) error {
return errors.Wrap(sb(r.scheme), errAddToScheme)
}
// AddCompositionTypes registers the Composition types with
// the registry's scheme. Only the v1 API of Compositions
// is currently supported.
func (r *Registry) AddCompositionTypes() error {
return r.AddToScheme(xpv1.AddToScheme)
}
// AddCrossplanePackageTypes registers the
// {Provider,Configuration,Lock, etc.}.pkg types with
// the registry's scheme.
func (r *Registry) AddCrossplanePackageTypes() error {
if err := r.AddToScheme(xppkgv1beta1.AddToScheme); err != nil {
return err
}
return r.AddToScheme(xppkgv1.AddToScheme)
}
// AddClaimType registers a new composite resource claim type
// with the given GVK
func (r *Registry) AddClaimType(gvk schema.GroupVersionKind) {
r.claimTypes = append(r.claimTypes, gvk)
}
// AddCompositeType registers a new composite resource type with the given GVK
func (r *Registry) AddCompositeType(gvk schema.GroupVersionKind) {
r.compositeTypes = append(r.compositeTypes, gvk)
}
// GetManagedResourceGVKs returns a list of all registered managed resource
// GVKs
func (r *Registry) GetManagedResourceGVKs() []schema.GroupVersionKind {
gvks := make([]schema.GroupVersionKind, 0, len(r.resourceConverters)+len(r.templateConverters))
for gvk := range r.resourceConverters {
gvks = append(gvks, gvk)
}
for gvk := range r.templateConverters {
gvks = append(gvks, gvk)
}
return gvks
}
// GetCompositionGVKs returns the registered Composition GVKs.
func (r *Registry) GetCompositionGVKs() []schema.GroupVersionKind {
// Composition types are registered with this registry's scheme
if _, ok := r.scheme.AllKnownTypes()[xpv1.CompositionGroupVersionKind]; ok {
return []schema.GroupVersionKind{xpv1.CompositionGroupVersionKind}
}
return nil
}
// GetCrossplanePackageGVKs returns the registered Crossplane package GVKs.
func (r *Registry) GetCrossplanePackageGVKs() []schema.GroupVersionKind {
if r.scheme.AllKnownTypes()[xppkgv1.ProviderGroupVersionKind] == nil ||
r.scheme.AllKnownTypes()[xppkgv1.ConfigurationGroupVersionKind] == nil ||
r.scheme.AllKnownTypes()[xppkgv1beta1.LockGroupVersionKind] == nil {
return nil
}
return []schema.GroupVersionKind{
xppkgv1.ProviderGroupVersionKind,
xppkgv1.ConfigurationGroupVersionKind,
xppkgv1beta1.LockGroupVersionKind,
}
}
// GetAllRegisteredGVKs returns a list of registered GVKs
// including v1.CompositionGroupVersionKind,
// metav1.ConfigurationGroupVersionKind,
// metav1alpha1.ConfigurationGroupVersionKind
// pkg.ConfigurationGroupVersionKind,
// pkg.ProviderGroupVersionKind,
// pkg.LockGroupVersionKind.
func (r *Registry) GetAllRegisteredGVKs() []schema.GroupVersionKind {
gvks := make([]schema.GroupVersionKind, 0, len(r.claimTypes)+len(r.compositeTypes)+len(r.resourceConverters)+len(r.templateConverters)+1)
gvks = append(gvks, r.claimTypes...)
gvks = append(gvks, r.compositeTypes...)
gvks = append(gvks, r.GetManagedResourceGVKs()...)
gvks = append(gvks, xpv1.CompositionGroupVersionKind, xpmetav1.ConfigurationGroupVersionKind, xpmetav1alpha1.ConfigurationGroupVersionKind,
xppkgv1.ConfigurationGroupVersionKind, xppkgv1.ProviderGroupVersionKind, xppkgv1beta1.LockGroupVersionKind)
return gvks
}
// ResourceConversionFn is a function that converts the specified migration
// source managed resource to one or more migration target managed resources.
type ResourceConversionFn func(mg resource.Managed) ([]resource.Managed, error)
// ComposedTemplateConversionFn is a function that converts from the specified
// migration source v1.ComposedTemplate to one or more migration
// target v1.ComposedTemplates.
type ComposedTemplateConversionFn func(sourceTemplate xpv1.ComposedTemplate, convertedTemplates ...*xpv1.ComposedTemplate) error
// PatchSetsConversionFn is a function that converts
// the `spec.patchSets` of a Composition from the migration source provider's
// schema to the migration target provider's schema.
type PatchSetsConversionFn func(psMap map[string]*xpv1.PatchSet) error
// ConfigurationMetadataV1ConversionFn is a function that converts the specified
// migration source Configuration v1 metadata to the migration target
// Configuration metadata.
type ConfigurationMetadataV1ConversionFn func(configuration *xpmetav1.Configuration) error
// ConfigurationMetadataV1Alpha1ConversionFn is a function that converts the specified
// migration source Configuration v1alpha1 metadata to the migration target
// Configuration metadata.
type ConfigurationMetadataV1Alpha1ConversionFn func(configuration *xpmetav1alpha1.Configuration) error
// PackageLockV1Beta1ConversionFn is a function that converts the specified
// migration source package v1beta1 lock to the migration target
// package lock.
type PackageLockV1Beta1ConversionFn func(pkg *xppkgv1beta1.Lock) error
// ConfigurationPackageV1ConversionFn is a function that converts the specified
// migration source Configuration v1 package to the migration target
// Configuration package(s).
type ConfigurationPackageV1ConversionFn func(pkg *xppkgv1.Configuration) error
// ProviderPackageV1ConversionFn is a function that converts the specified
// migration source provider v1 package to the migration target
// Provider package(s).
type ProviderPackageV1ConversionFn func(pkg xppkgv1.Provider) ([]xppkgv1.Provider, error)
// CategoricalConverterFunctionFn is a function that converts resources of a
// Category. Because it receives an unstructured argument, it should be
// used for implementing generic conversion functions acting on a specific
// category.
type CategoricalConverterFunctionFn func(u *UnstructuredWithMetadata) error
type delegatingConverter struct {
rFn ResourceConversionFn
cmpFn ComposedTemplateConversionFn
psFn PatchSetsConversionFn
confMetaV1Fn ConfigurationMetadataV1ConversionFn
confMetaV1Alpha1Fn ConfigurationMetadataV1Alpha1ConversionFn
confPackageV1Fn ConfigurationPackageV1ConversionFn
providerPackageV1Fn ProviderPackageV1ConversionFn
packageLockV1Beta1Fn PackageLockV1Beta1ConversionFn
categoricalConverterFn CategoricalConverterFunctionFn
}
func (d *delegatingConverter) Convert(u *UnstructuredWithMetadata) error {
if d.categoricalConverterFn == nil {
return nil
}
return d.categoricalConverterFn(u)
}
func (d *delegatingConverter) ConfigurationPackageV1(pkg *xppkgv1.Configuration) error {
if d.confPackageV1Fn == nil {
return nil
}
return d.confPackageV1Fn(pkg)
}
func (d *delegatingConverter) PackageLockV1Beta1(lock *xppkgv1beta1.Lock) error {
if d.packageLockV1Beta1Fn == nil {
return nil
}
return d.packageLockV1Beta1Fn(lock)
}
func (d *delegatingConverter) ProviderPackageV1(pkg xppkgv1.Provider) ([]xppkgv1.Provider, error) {
if d.providerPackageV1Fn == nil {
return []xppkgv1.Provider{pkg}, nil
}
return d.providerPackageV1Fn(pkg)
}
func (d *delegatingConverter) ConfigurationMetadataV1(c *xpmetav1.Configuration) error {
if d.confMetaV1Fn == nil {
return nil
}
return d.confMetaV1Fn(c)
}
func (d *delegatingConverter) ConfigurationMetadataV1Alpha1(c *xpmetav1alpha1.Configuration) error {
if d.confMetaV1Alpha1Fn == nil {
return nil
}
return d.confMetaV1Alpha1Fn(c)
}
func (d *delegatingConverter) PatchSets(psMap map[string]*xpv1.PatchSet) error {
if d.psFn == nil {
return nil
}
return d.psFn(psMap)
}
// Resource takes a managed resource and returns zero or more managed
// resources to be created by calling the configured ResourceConversionFn.
func (d *delegatingConverter) Resource(mg resource.Managed) ([]resource.Managed, error) {
if d.rFn == nil {
return []resource.Managed{mg}, nil
}
return d.rFn(mg)
}
// ComposedTemplate converts from the specified migration source
// v1.ComposedTemplate to the migration target schema by calling the configured
// ComposedTemplateConversionFn.
func (d *delegatingConverter) ComposedTemplate(sourceTemplate xpv1.ComposedTemplate, convertedTemplates ...*xpv1.ComposedTemplate) error {
if d.cmpFn == nil {
return nil
}
return d.cmpFn(sourceTemplate, convertedTemplates...)
}
// DefaultCompositionConverter is a generic composition converter
// conversionMap: is fieldpath map for conversion
// Key of the conversionMap points to the source field
// Value of the conversionMap points to the target field
// Example: "spec.forProvider.assumeRolePolicyDocument": "spec.forProvider.assumeRolePolicy",
// fns are functions that manipulate the patchsets
func DefaultCompositionConverter(conversionMap map[string]string, fns ...func(sourceTemplate xpv1.ComposedTemplate) ([]xpv1.Patch, error)) ComposedTemplateConversionFn {
return func(sourceTemplate xpv1.ComposedTemplate, convertedTemplates ...*xpv1.ComposedTemplate) error {
var patchesToAdd []xpv1.Patch
for _, fn := range fns {
patches, err := fn(sourceTemplate)
if err != nil {
return errors.Wrap(err, "cannot run the patch sets converter function")
}
patchesToAdd = append(patchesToAdd, patches...)
}
patchesToAdd = append(patchesToAdd, ConvertComposedTemplatePatchesMap(sourceTemplate, conversionMap)...)
for i := range convertedTemplates {
convertedTemplates[i].Patches = append(convertedTemplates[i].Patches, patchesToAdd...)
}
return nil
}
}
// RegisterAPIConversionFunctions registers the supplied ResourceConversionFn and
// ComposedTemplateConversionFn for the specified GVK, and the supplied
// PatchSetsConversionFn for all the discovered Compositions.
// The specified GVK must belong to a Crossplane managed resource type and
// the type must already have been registered with this registry's scheme
// by calling Registry.AddToScheme.
func (r *Registry) RegisterAPIConversionFunctions(gvk schema.GroupVersionKind, rFn ResourceConversionFn, cmpFn ComposedTemplateConversionFn, psFn PatchSetsConversionFn) {
d := &delegatingConverter{
rFn: rFn,
cmpFn: cmpFn,
psFn: psFn,
}
r.RegisterPatchSetConverter(AllCompositions, d)
r.RegisterCompositionConverter(gvk, d)
}
// RegisterConversionFunctions registers the supplied ResourceConversionFn and
// ComposedTemplateConversionFn for the specified GVK, and the supplied
// PatchSetsConversionFn for all the discovered Compositions.
// The specified GVK must belong to a Crossplane managed resource type and
// the type must already have been registered with this registry's scheme
// by calling Registry.AddToScheme.
// Deprecated: Use RegisterAPIConversionFunctions instead.
func (r *Registry) RegisterConversionFunctions(gvk schema.GroupVersionKind, rFn ResourceConversionFn, cmpFn ComposedTemplateConversionFn, psFn PatchSetsConversionFn) {
r.RegisterAPIConversionFunctions(gvk, rFn, cmpFn, psFn)
}
func (r *Registry) RegisterPreProcessor(category Category, pp UnstructuredPreProcessor) {
r.unstructuredPreProcessors[category] = append(r.unstructuredPreProcessors[category], pp)
}
// PreProcessor is a function type to convert pre-processor functions to
// UnstructuredPreProcessor.
type PreProcessor func(u UnstructuredWithMetadata) error
func (pp PreProcessor) PreProcess(u UnstructuredWithMetadata) error {
if pp == nil {
return nil
}
return pp(u)
}
func (r *Registry) RegisterResourcePreProcessor(pp ManagedPreProcessor) {
r.resourcePreProcessors = append(r.resourcePreProcessors, pp)
}
type ResourcePreProcessor func(mg resource.Managed) error
func (pp ResourcePreProcessor) ResourcePreProcessor(mg resource.Managed) error {
if pp == nil {
return nil
}
return pp(mg)
}