node-feature-discovery/test/e2e/utils/crd.go

/*
Copyright 2022 The Kubernetes Authors.

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 utils

import (
	"bytes"
	"context"
	"fmt"
	"os"
	"path/filepath"
	"runtime"

	apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
	extclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	apiruntime "k8s.io/apimachinery/pkg/runtime"
	"k8s.io/client-go/kubernetes/scheme"
	nfdv1alpha1 "sigs.k8s.io/node-feature-discovery/pkg/apis/nfd/v1alpha1"
	nfdclientset "sigs.k8s.io/node-feature-discovery/pkg/generated/clientset/versioned"
	nfdscheme "sigs.k8s.io/node-feature-discovery/pkg/generated/clientset/versioned/scheme"
)

var packagePath string

// CreateNfdCRDs creates the NodeFeatureRule CRD in the API server.
func CreateNfdCRDs(cli extclient.Interface) ([]*apiextensionsv1.CustomResourceDefinition, error) {
	crds, err := crdsFromFile(filepath.Join(packagePath, "..", "..", "..", "deployment", "base", "nfd-crds", "nfd-api-crds.yaml"))
	if err != nil {
		return nil, err
	}

	newCRDs := make([]*apiextensionsv1.CustomResourceDefinition, len(crds))
	for i, crd := range crds {
		// Delete existing CRD (if any) with this we also get rid of stale objects
		err = cli.ApiextensionsV1().CustomResourceDefinitions().Delete(context.TODO(), crd.Name, metav1.DeleteOptions{})
		if err != nil && !errors.IsNotFound(err) {
			return nil, fmt.Errorf("failed to delete NodeFeatureRule CRD: %w", err)
		}
		newCRDs[i], err = cli.ApiextensionsV1().CustomResourceDefinitions().Create(context.TODO(), crd, metav1.CreateOptions{})
		if err != nil {
			return nil, err
		}
	}
	return newCRDs, nil
}

// CreateNodeFeatureRuleFromFile creates a NodeFeatureRule object from a given file located under test data directory.
func CreateNodeFeatureRulesFromFile(cli nfdclientset.Interface, filename string) error {
	objs, err := nodeFeatureRulesFromFile(filepath.Join(packagePath, "..", "data", filename))
	if err != nil {
		return err
	}

	for _, obj := range objs {
		if _, err = cli.NfdV1alpha1().NodeFeatureRules().Create(context.TODO(), obj, metav1.CreateOptions{}); err != nil {
			return err
		}
	}
	return nil
}

// UpdateNodeFeatureRulesFromFile updates existing NodeFeatureRule object from a given file located under test data directory.
func UpdateNodeFeatureRulesFromFile(cli nfdclientset.Interface, filename string) error {
	objs, err := nodeFeatureRulesFromFile(filepath.Join(packagePath, "..", "data", filename))
	if err != nil {
		return err
	}

	for _, obj := range objs {
		var nfr *nfdv1alpha1.NodeFeatureRule
		if nfr, err = cli.NfdV1alpha1().NodeFeatureRules().Get(context.TODO(), obj.Name, metav1.GetOptions{}); err != nil {
			return fmt.Errorf("failed to get NodeFeatureRule %w", err)
		}

		obj.SetResourceVersion(nfr.GetResourceVersion())
		if _, err = cli.NfdV1alpha1().NodeFeatureRules().Update(context.TODO(), obj, metav1.UpdateOptions{}); err != nil {
			return fmt.Errorf("failed to update NodeFeatureRule %w", err)
		}
	}
	return nil
}

func apiObjsFromFile(path string, decoder apiruntime.Decoder) ([]apiruntime.Object, error) {
	data, err := os.ReadFile(path)
	if err != nil {
		return nil, err
	}

	// TODO: find out a nicer way to decode multiple api objects from a single
	// file (K8s must have that somewhere)
	split := bytes.Split(data, []byte("---"))
	objs := []apiruntime.Object{}

	for _, slice := range split {
		if len(slice) == 0 {
			continue
		}
		obj, _, err := decoder.Decode(slice, nil, nil)
		if err != nil {
			return nil, err
		}
		objs = append(objs, obj)
	}
	return objs, err
}

// crdsFromFile creates a CustomResourceDefinition API object from a file.
func crdsFromFile(path string) ([]*apiextensionsv1.CustomResourceDefinition, error) {
	objs, err := apiObjsFromFile(path, scheme.Codecs.UniversalDeserializer())
	if err != nil {
		return nil, err
	}

	crds := make([]*apiextensionsv1.CustomResourceDefinition, len(objs))

	for i, obj := range objs {
		var ok bool
		crds[i], ok = obj.(*apiextensionsv1.CustomResourceDefinition)
		if !ok {
			return nil, fmt.Errorf("unexpected type %T when reading %q", obj, path)
		}
	}

	return crds, nil
}

func nodeFeatureRulesFromFile(path string) ([]*nfdv1alpha1.NodeFeatureRule, error) {
	objs, err := apiObjsFromFile(path, nfdscheme.Codecs.UniversalDeserializer())
	if err != nil {
		return nil, err
	}

	crs := make([]*nfdv1alpha1.NodeFeatureRule, len(objs))

	for i, obj := range objs {
		var ok bool
		crs[i], ok = obj.(*nfdv1alpha1.NodeFeatureRule)
		if !ok {
			return nil, fmt.Errorf("unexpected type %t when reading %q", obj, path)
		}
	}

	return crs, nil
}

func init() {
	_, thisFile, _, _ := runtime.Caller(0)
	packagePath = filepath.Dir(thisFile)

	// Register k8s scheme to be able to create CRDs
	_ = apiextensionsv1.AddToScheme(scheme.Scheme)
}