forked from operator-framework/operator-sdk
/
crd.go
216 lines (195 loc) · 6.04 KB
/
crd.go
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// Copyright 2018 The Operator-SDK 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 scaffold
import (
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"github.com/operator-framework/operator-sdk/internal/pkg/scaffold/input"
"github.com/operator-framework/operator-sdk/internal/util/k8sutil"
"github.com/ghodss/yaml"
"github.com/spf13/afero"
apiextv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
crdgenerator "sigs.k8s.io/controller-tools/pkg/crd/generator"
)
// CRD is the input needed to generate a deploy/crds/<group>_<version>_<kind>_crd.yaml file
type CRD struct {
input.Input
// Resource defines the inputs for the new custom resource definition
Resource *Resource
// IsOperatorGo is true when the operator is written in Go.
IsOperatorGo bool
once sync.Once
fs afero.Fs // For testing, ex. afero.NewMemMapFs()
}
func (s *CRD) initFS(fs afero.Fs) {
s.once.Do(func() {
s.fs = fs
})
}
func (s *CRD) getFS() afero.Fs {
s.initFS(afero.NewOsFs())
return s.fs
}
func (s *CRD) GetInput() (input.Input, error) {
if s.Path == "" {
fileName := fmt.Sprintf("%s_%s_%s_crd.yaml",
s.Resource.GoImportGroup,
strings.ToLower(s.Resource.Version),
s.Resource.LowerKind)
s.Path = filepath.Join(CRDsDir, fileName)
}
return s.Input, nil
}
var _ CustomRenderer = &CRD{}
func (s *CRD) SetFS(fs afero.Fs) { s.initFS(fs) }
func (s *CRD) CustomRender() ([]byte, error) {
i, err := s.GetInput()
if err != nil {
return nil, err
}
crd := &apiextv1beta1.CustomResourceDefinition{}
if s.IsOperatorGo {
// This sets domain as empty string when we can't extract it from FullGroup.
// In turn this defaults to extracting the domain from project root file
// in controller-tools.
fg := strings.SplitN(s.Resource.FullGroup, ".", 2)
domain := s.Resource.FullGroup
if len(fg) > 1 {
domain = fg[1]
}
fs := afero.NewMemMapFs()
g := &crdgenerator.Generator{
RootPath: s.AbsProjectPath,
Domain: domain,
Repo: s.Repo,
OutputDir: ".",
SkipMapValidation: false,
OutFs: fs,
}
if err := g.ValidateAndInitFields(); err != nil {
return nil, err
}
if err := g.Do(); err != nil {
return nil, err
}
// controller-tools generates crd file names with no _crd.yaml suffix:
// <group>_<version>_<kind>.yaml.
path := strings.Replace(filepath.Base(i.Path), "_crd.yaml", ".yaml", 1)
b, err := afero.ReadFile(fs, path)
if err != nil {
if os.IsNotExist(err) {
return nil, fmt.Errorf("no API exists for Group %s Version %s Kind %s",
s.Resource.GoImportGroup, s.Resource.Version, s.Resource.Kind)
}
return nil, err
}
if err = yaml.Unmarshal(b, crd); err != nil {
return nil, err
}
// controller-tools does not set ListKind or Singular names.
setCRDNamesForResource(crd, s.Resource)
// Remove controller-tools default label.
delete(crd.Labels, "controller-tools.k8s.io")
} else {
// There are currently no commands to update CRD manifests for non-Go
// operators, so if a CRD manifests already exists for this gvk, this
// scaffold is a no-op.
path := filepath.Join(s.AbsProjectPath, i.Path)
if _, err = s.getFS().Stat(path); err == nil {
b, err := afero.ReadFile(s.getFS(), path)
if err != nil {
return nil, err
}
if len(b) == 0 {
crd = newCRDForResource(s.Resource)
} else {
if err = yaml.Unmarshal(b, crd); err != nil {
return nil, err
}
}
}
}
setCRDVersions(crd)
return k8sutil.GetObjectBytes(crd)
}
func newCRDForResource(r *Resource) *apiextv1beta1.CustomResourceDefinition {
crd := &apiextv1beta1.CustomResourceDefinition{
TypeMeta: metav1.TypeMeta{
APIVersion: apiextv1beta1.SchemeGroupVersion.String(),
Kind: "CustomResourceDefinition",
},
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s.%s", r.Resource, r.FullGroup),
},
Spec: apiextv1beta1.CustomResourceDefinitionSpec{
Group: r.FullGroup,
Scope: apiextv1beta1.NamespaceScoped,
Version: r.Version,
Subresources: &apiextv1beta1.CustomResourceSubresources{
Status: &apiextv1beta1.CustomResourceSubresourceStatus{},
},
},
}
setCRDNamesForResource(crd, r)
return crd
}
func setCRDNamesForResource(crd *apiextv1beta1.CustomResourceDefinition, r *Resource) {
if crd.Spec.Names.Kind == "" {
crd.Spec.Names.Kind = r.Kind
}
if crd.Spec.Names.ListKind == "" {
crd.Spec.Names.ListKind = r.Kind + "List"
}
if crd.Spec.Names.Plural == "" {
crd.Spec.Names.Plural = r.Resource
}
if crd.Spec.Names.Singular == "" {
crd.Spec.Names.Singular = r.LowerKind
}
}
func setCRDVersions(crd *apiextv1beta1.CustomResourceDefinition) {
// crd.Version is deprecated, use crd.Versions instead.
var crdVersions []apiextv1beta1.CustomResourceDefinitionVersion
if crd.Spec.Version != "" {
var verExists, hasStorageVer bool
for _, ver := range crd.Spec.Versions {
if crd.Spec.Version == ver.Name {
verExists = true
}
// There must be exactly one version flagged as a storage version.
if ver.Storage {
hasStorageVer = true
}
}
if !verExists {
crdVersions = []apiextv1beta1.CustomResourceDefinitionVersion{
{Name: crd.Spec.Version, Served: true, Storage: !hasStorageVer},
}
}
} else {
crdVersions = []apiextv1beta1.CustomResourceDefinitionVersion{
{Name: "v1alpha1", Served: true, Storage: true},
}
}
if len(crd.Spec.Versions) > 0 {
// crd.Version should always be the first element in crd.Versions.
crd.Spec.Versions = append(crdVersions, crd.Spec.Versions...)
} else {
crd.Spec.Versions = crdVersions
}
}