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register.go
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register.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package contexts
import (
"context"
"fmt"
"strings"
"testing"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/apis/core/v1alpha1"
dclcontroller "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/controller/dcl"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl"
dclconversion "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/conversion"
dclextension "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/extension"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/kcclite"
dcllivestate "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/livestate"
dclmetadata "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/metadata"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/schema/dclschemaloader"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/krmtotf"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/resourceoverrides"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/servicemapping/servicemappingloader"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/test/resourcefixture"
"github.com/nasa9084/go-openapi"
mmdcl "github.com/GoogleCloudPlatform/declarative-resource-client-library/dcl"
dclunstruct "github.com/GoogleCloudPlatform/declarative-resource-client-library/unstructured"
tfschema "github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
"github.com/hashicorp/terraform-plugin-sdk/v2/terraform"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type ResourceContext struct {
ResourceGVK schema.GroupVersionKind
ResourceKind string
SkipNoChange bool
SkipUpdate bool
SkipDriftDetection bool
SkipDelete bool
// fields related to DCL-based resources
DCLSchema *openapi.Schema
DCLBased bool
}
var (
resourceContextMap = map[string]ResourceContext{}
emptyGVK = schema.GroupVersionKind{}
)
func GetResourceContext(fixture resourcefixture.ResourceFixture, serviceMetadataLoader dclmetadata.ServiceMetadataLoader, dclSchemaLoader dclschemaloader.DCLSchemaLoader) ResourceContext {
rc, ok := resourceContextMap[fixture.Name]
if !ok {
rc = ResourceContext{
ResourceGVK: fixture.GVK,
ResourceKind: fixture.GVK.Kind,
}
}
if rc.ResourceGVK == emptyGVK {
rc.ResourceGVK = fixture.GVK
}
if dclmetadata.IsDCLBasedResourceKind(rc.ResourceGVK, serviceMetadataLoader) {
s, err := dclschemaloader.GetDCLSchemaForGVK(rc.ResourceGVK, serviceMetadataLoader, dclSchemaLoader)
if err != nil {
panic(fmt.Sprintf("error getting the DCL schema for GVK %v: %v", rc.ResourceGVK, err))
}
rc.DCLSchema = s
rc.DCLBased = true
}
return rc
}
func (rc ResourceContext) SupportsLabels(smLoader *servicemappingloader.ServiceMappingLoader) bool {
if rc.DCLBased {
_, _, found, err := dclextension.GetLabelsFieldSchema(rc.DCLSchema)
if err != nil {
panic(fmt.Errorf("error getting the DCL schema for labels field: %w", err))
}
return found
}
// For tf based resources, resolve the label info from ResourceConfig
resourceConfig := rc.getResourceConfig(smLoader)
return resourceConfig.MetadataMapping.Labels != ""
}
func (rc ResourceContext) getResourceConfig(smLoader *servicemappingloader.ServiceMappingLoader) v1alpha1.ResourceConfig {
for _, sm := range smLoader.GetServiceMappings() {
for _, resourceConfig := range sm.Spec.Resources {
if resourceConfig.Kind == rc.ResourceKind {
return resourceConfig
}
}
}
panic(fmt.Errorf("no resource config found for kind: %v", rc.ResourceKind))
}
func (rc ResourceContext) IsAutoGenerated(smLoader *servicemappingloader.ServiceMappingLoader) bool {
if rc.DCLBased {
return false
}
resourceConfig := rc.getResourceConfig(smLoader)
return resourceConfig.AutoGenerated
}
func (rc ResourceContext) Create(ctx context.Context, _ *testing.T, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader, config *mmdcl.Config, dclConverter *dclconversion.Converter) (*unstructured.Unstructured, error) {
if rc.DCLBased {
return dclCreate(ctx, u, config, c, dclConverter, smLoader)
}
return terraformCreate(ctx, u, provider, c, smLoader)
}
func (rc ResourceContext) Get(ctx context.Context, _ *testing.T, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader, config *mmdcl.Config, dclConverter *dclconversion.Converter) (*unstructured.Unstructured, error) {
if rc.DCLBased {
return dclGet(ctx, u, config, c, dclConverter, smLoader)
}
return terraformGet(ctx, u, provider, c, smLoader)
}
func (rc ResourceContext) Delete(ctx context.Context, _ *testing.T, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader, config *mmdcl.Config, dclConverter *dclconversion.Converter) error {
if rc.DCLBased {
return dclDelete(ctx, u, config, c, dclConverter, smLoader)
}
return terraformDelete(ctx, u, provider, c, smLoader)
}
func terraformDelete(ctx context.Context, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader) error {
resource, liveState, err := getTerraformResourceAndLiveState(ctx, u, provider, c, smLoader)
if err != nil {
return err
}
if liveState.Empty() {
return fmt.Errorf("resource '%v' of type '%v' cannot be deleted as it does not exist", u.GetName(), u.GroupVersionKind())
}
_, diagnostics := resource.TFResource.Apply(ctx, liveState, &terraform.InstanceDiff{Destroy: true}, provider.Meta())
if err := krmtotf.NewErrorFromDiagnostics(diagnostics); err != nil {
return fmt.Errorf("error deleting resource: %w", err)
}
return err
}
func terraformCreate(ctx context.Context, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader) (*unstructured.Unstructured, error) {
resource, liveState, err := getTerraformResourceAndLiveState(ctx, u, provider, c, smLoader)
if err != nil {
return nil, err
}
if !liveState.Empty() {
return nil, fmt.Errorf("resource '%v' of type '%v' cannot be created as it already exists", u.GetName(), u.GroupVersionKind())
}
config, _, err := krmtotf.KRMResourceToTFResourceConfig(resource, c, smLoader)
if err != nil {
return nil, fmt.Errorf("error expanding resource configuration: %w", err)
}
diff, err := resource.TFResource.Diff(ctx, liveState, config, provider.Meta())
if err != nil {
return nil, fmt.Errorf("error calculating diff: %w", err)
}
newState, diagnostics := resource.TFResource.Apply(ctx, liveState, diff, provider.Meta())
if err := krmtotf.NewErrorFromDiagnostics(diagnostics); err != nil {
return nil, fmt.Errorf("error applying resource change: %w", err)
}
return resourceToKRM(resource, newState)
}
func terraformGet(ctx context.Context, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader) (*unstructured.Unstructured, error) {
resource, liveState, err := getTerraformResourceAndLiveState(ctx, u, provider, c, smLoader)
if err != nil {
return nil, err
}
if liveState.Empty() {
return nil, fmt.Errorf("resource '%v' of type '%v' is not found", u.GetName(), u.GroupVersionKind())
}
return resourceToKRM(resource, liveState)
}
func dclCreate(ctx context.Context, u *unstructured.Unstructured, config *mmdcl.Config, kubeClient client.Client, converter *dclconversion.Converter, serviceMappingLoader *servicemappingloader.ServiceMappingLoader) (*unstructured.Unstructured, error) {
resource, err := newDCLResource(u, converter)
if err != nil {
return nil, err
}
liveLite, err := dcllivestate.FetchLiveState(ctx, resource, config, converter, serviceMappingLoader, kubeClient)
if err != nil {
return nil, err
}
if liveLite != nil {
return nil, fmt.Errorf("resource '%v' of type '%v' cannot be created as it already exists", u.GetName(), u.GroupVersionKind())
}
lite, err := kcclite.ToKCCLite(resource, converter.MetadataLoader, converter.SchemaLoader, serviceMappingLoader, kubeClient)
if err != nil {
return nil, fmt.Errorf("error converting KCC full to KCC lite: %w", err)
}
dclObj, err := converter.KRMObjectToDCLObject(lite)
if err != nil {
return nil, fmt.Errorf("error converting KCC lite to DCL resource: %w", err)
}
createdDCLObj, err := dclunstruct.Apply(ctx, config, dclObj, dclcontroller.LifecycleParams...)
if err != nil {
return nil, fmt.Errorf("error applying the desired resource: %w", err)
}
// get the new state in KCC lite format
newStateLite, err := converter.DCLObjectToKRMObject(createdDCLObj)
if err != nil {
return nil, fmt.Errorf("error converting DCL resource to KCC lite: %w", err)
}
return dclStateToKRM(resource, newStateLite, converter.MetadataLoader)
}
func dclGet(ctx context.Context, u *unstructured.Unstructured, config *mmdcl.Config, kubeClient client.Client, converter *dclconversion.Converter, serviceMappingLoader *servicemappingloader.ServiceMappingLoader) (*unstructured.Unstructured, error) {
resource, err := newDCLResource(u, converter)
if err != nil {
return nil, err
}
liveLite, err := dcllivestate.FetchLiveState(ctx, resource, config, converter, serviceMappingLoader, kubeClient)
if err != nil {
return nil, err
}
if liveLite == nil {
return nil, fmt.Errorf("resource '%v' of type '%v' is not found", u.GetName(), u.GroupVersionKind())
}
return dclStateToKRM(resource, liveLite, converter.MetadataLoader)
}
func dclDelete(ctx context.Context, u *unstructured.Unstructured, config *mmdcl.Config, kubeClient client.Client, converter *dclconversion.Converter, serviceMappingLoader *servicemappingloader.ServiceMappingLoader) error {
resource, err := newDCLResource(u, converter)
if err != nil {
return err
}
lite, err := kcclite.ToKCCLiteBestEffort(resource, converter.MetadataLoader, converter.SchemaLoader, serviceMappingLoader, kubeClient)
if err != nil {
return fmt.Errorf("error converting KCC full to KCC lite: %w", err)
}
dclObj, err := converter.KRMObjectToDCLObject(lite)
if err != nil {
return fmt.Errorf("error converting KCC lite to DCL resource: %w", err)
}
if err := dclunstruct.Delete(ctx, config, dclObj); err != nil {
return fmt.Errorf("error deleting the resource %v: %w", resource.GetNamespacedName(), err)
}
return nil
}
func newDCLResource(u *unstructured.Unstructured, converter *dclconversion.Converter) (*dcl.Resource, error) {
s, err := dclschemaloader.GetDCLSchemaForGVK(u.GroupVersionKind(), converter.MetadataLoader, converter.SchemaLoader)
if err != nil {
return nil, err
}
resource, err := dcl.NewResource(u, s)
if err != nil {
return nil, err
}
return resource, nil
}
func dclStateToKRM(resource *dcl.Resource, liveState *unstructured.Unstructured, smLoader dclmetadata.ServiceMetadataLoader) (*unstructured.Unstructured, error) {
spec, status, err := kcclite.ResolveSpecAndStatus(liveState, resource, smLoader)
if err != nil {
return nil, err
}
resource.Spec = spec
resource.Status = status
resource.Labels = liveState.GetLabels()
return resource.MarshalAsUnstructured()
}
func resourceToKRM(resource *krmtotf.Resource, state *terraform.InstanceState) (*unstructured.Unstructured, error) {
resource.Spec, resource.Status = krmtotf.ResolveSpecAndStatusWithResourceID(resource, state)
resource.Labels = krmtotf.GetLabelsFromState(resource, state)
// Apply post-actuation transformation.
if err := resourceoverrides.Handler.PostActuationTransform(resource.Original, &resource.Resource, state, nil); err != nil {
return nil, fmt.Errorf("error applying post-actuation transformation to resource '%v': %w", resource.GetNamespacedName(), err)
}
return resource.MarshalAsUnstructured()
}
func getTerraformResourceAndLiveState(ctx context.Context, u *unstructured.Unstructured, provider *tfschema.Provider, c client.Client, smLoader *servicemappingloader.ServiceMappingLoader) (*krmtotf.Resource,
*terraform.InstanceState, error) {
resource, err := newTerraformResource(u, provider, smLoader)
if err != nil {
return nil, nil, err
}
// Apply pre-actuation transformation.
if err := resourceoverrides.Handler.PreActuationTransform(&resource.Resource); err != nil {
return nil, nil, fmt.Errorf("error applying pre-actuation transformation to resource '%s': %w", u.GetName(), err)
}
liveState, err := krmtotf.FetchLiveState(ctx, resource, provider, c, smLoader)
if err != nil {
return nil, nil, fmt.Errorf("error fetching live state: %w", err)
}
return resource, liveState, nil
}
func newTerraformResource(u *unstructured.Unstructured, provider *tfschema.Provider, smLoader *servicemappingloader.ServiceMappingLoader) (*krmtotf.Resource, error) {
sm, err := smLoader.GetServiceMapping(u.GroupVersionKind().Group)
if err != nil {
return nil, err
}
resource, err := krmtotf.NewResource(u, sm, provider)
if err != nil {
return nil, fmt.Errorf("could not parse resource %s: %w", u.GetName(), err)
}
return resource, nil
}
func IsNotFoundError(err error) bool {
if err == nil {
return false
}
return strings.Contains(err.Error(), "is not found")
}