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add a new command `kubebuilder create webhook` to scaffold the webhooks. --defaulting and --imperative-validation can be used to scaffold mutating and validating webhooks.
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Mengqi Yu
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Jun 28, 2019
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/* | ||
Copyright 2018 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 main | ||
|
||
import ( | ||
"fmt" | ||
|
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"github.com/spf13/cobra" | ||
) | ||
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func newCreateCmd() *cobra.Command { | ||
cmd := &cobra.Command{ | ||
Use: "create", | ||
Short: "Scaffold a Kubernetes API or webhook.", | ||
Long: `Scaffold a Kubernetes API or webhook.`, | ||
Run: func(cmd *cobra.Command, args []string) { | ||
fmt.Println("Coming soon.") | ||
}, | ||
} | ||
cmd.AddCommand( | ||
newAPICommand(), | ||
newWebhookV2Cmd(), | ||
) | ||
return cmd | ||
} |
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Original file line number | Diff line number | Diff line change |
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/* | ||
Copyright 2019 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. | ||
*/ | ||
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package main | ||
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import ( | ||
"fmt" | ||
"log" | ||
"os" | ||
"path/filepath" | ||
"strings" | ||
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"github.com/gobuffalo/flect" | ||
"github.com/spf13/cobra" | ||
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"sigs.k8s.io/kubebuilder/pkg/scaffold" | ||
"sigs.k8s.io/kubebuilder/pkg/scaffold/input" | ||
"sigs.k8s.io/kubebuilder/pkg/scaffold/project" | ||
"sigs.k8s.io/kubebuilder/pkg/scaffold/v1/resource" | ||
resourcev2 "sigs.k8s.io/kubebuilder/pkg/scaffold/v2" | ||
"sigs.k8s.io/kubebuilder/pkg/scaffold/v2/webhook" | ||
) | ||
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func newWebhookV2Cmd() *cobra.Command { | ||
o := webhookV2Options{} | ||
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cmd := &cobra.Command{ | ||
Use: "webhook", | ||
Short: "Scaffold a webhook for an API resource.", | ||
Long: `Scaffold a webhook for an API resource. You can choose to scaffold defaulting and (or) validating webhooks.`, | ||
Example: ` # Create defaulting and validating webhooks for CRD of group crew, version v1 and kind FirstMate. | ||
kubebuilder webhook --group crew --version v1 --kind FirstMate --defaulting --programmatic-validation | ||
`, | ||
Run: func(cmd *cobra.Command, args []string) { | ||
dieIfNoProject() | ||
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projectInfo, err := scaffold.LoadProjectFile("PROJECT") | ||
if err != nil { | ||
log.Fatalf("failed to read the PROJECT file: %v", err) | ||
} | ||
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if projectInfo.Version != project.Version2 { | ||
fmt.Printf("kubebuilder webhook is for project version: 2, the version of this project is: %s \n", projectInfo.Version) | ||
os.Exit(0) | ||
} | ||
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if !o.defaulting && !o.validation { | ||
fmt.Printf("kubebuilder webhook requires at least one of --defaulting and --programmatic-validation") | ||
os.Exit(0) | ||
} | ||
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fmt.Println(filepath.Join("api", fmt.Sprintf("%s_webhook.go", strings.ToLower(o.res.Kind)))) | ||
webhookScaffolder := &webhook.Webhook{ | ||
Resource: o.res, | ||
Defaulting: o.defaulting, | ||
Validating: o.validation, | ||
} | ||
err = (&scaffold.Scaffold{}).Execute( | ||
input.Options{}, | ||
webhookScaffolder, | ||
) | ||
if err != nil { | ||
fmt.Printf("error scaffolding webhook: %v", err) | ||
os.Exit(1) | ||
} | ||
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err = (&resourcev2.Main{}).Update( | ||
&resourcev2.MainUpdateOptions{ | ||
Project: &projectInfo, | ||
WireResource: false, | ||
WireController: false, | ||
WireWebhook: true, | ||
Resource: o.res, | ||
}) | ||
if err != nil { | ||
fmt.Printf("error updating main.go: %v", err) | ||
os.Exit(1) | ||
} | ||
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if projectInfo.Version != project.Version1 { | ||
fmt.Printf("webhook scaffolding is not supported for this project version: %s \n", projectInfo.Version) | ||
os.Exit(0) | ||
} | ||
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fmt.Println("Writing scaffold for you to edit...") | ||
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if len(o.res.Resource) == 0 { | ||
o.res.Resource = flect.Pluralize(strings.ToLower(o.res.Kind)) | ||
} | ||
}, | ||
} | ||
o.res = gvkForFlags(cmd.Flags()) | ||
cmd.Flags().BoolVar(&o.defaulting, "defaulting", false, | ||
"if set, scaffold the defaulting webhook") | ||
cmd.Flags().BoolVar(&o.validation, "programmatic-validation", false, | ||
"if set, scaffold the validating webhook") | ||
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return cmd | ||
} | ||
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// webhookOptions represents commandline options for scaffolding a webhook. | ||
type webhookV2Options struct { | ||
res *resource.Resource | ||
defaulting bool | ||
validation bool | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,73 @@ | ||
/* | ||
Copyright 2019 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. | ||
*/ | ||
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package util | ||
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import ( | ||
"fmt" | ||
"os" | ||
"path" | ||
"path/filepath" | ||
"strings" | ||
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"sigs.k8s.io/kubebuilder/pkg/scaffold/input" | ||
"sigs.k8s.io/kubebuilder/pkg/scaffold/v1/resource" | ||
) | ||
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func GetResourceInfo(r *resource.Resource, in input.Input) (resourcePackage, groupDomain string) { | ||
// Use the k8s.io/api package for core resources | ||
coreGroups := map[string]string{ | ||
"apps": "", | ||
"admission": "k8s.io", | ||
"admissionregistration": "k8s.io", | ||
"auditregistration": "k8s.io", | ||
"apiextensions": "k8s.io", | ||
"authentication": "k8s.io", | ||
"authorization": "k8s.io", | ||
"autoscaling": "", | ||
"batch": "", | ||
"certificates": "k8s.io", | ||
"coordination": "k8s.io", | ||
"core": "", | ||
"events": "k8s.io", | ||
"extensions": "", | ||
"imagepolicy": "k8s.io", | ||
"networking": "k8s.io", | ||
"node": "k8s.io", | ||
"metrics": "k8s.io", | ||
"policy": "", | ||
"rbac.authorization": "k8s.io", | ||
"scheduling": "k8s.io", | ||
"setting": "k8s.io", | ||
"storage": "k8s.io", | ||
} | ||
resourcePath := filepath.Join("api", r.Version, fmt.Sprintf("%s_types.go", strings.ToLower(r.Kind))) | ||
if _, err := os.Stat(resourcePath); os.IsNotExist(err) { | ||
if domain, found := coreGroups[r.Group]; found { | ||
// TODO: support apiextensions.k8s.io and metrics.k8s.io. | ||
// apiextensions.k8s.io is in k8s.io/apiextensions-apiserver/pkg/apis/apiextensions | ||
// metrics.k8s.io is in k8s.io/metrics/pkg/apis/metrics | ||
resourcePackage := path.Join("k8s.io", "api", r.Group) | ||
groupDomain = r.Group | ||
if domain != "" { | ||
groupDomain = r.Group + "." + domain | ||
} | ||
return resourcePackage, groupDomain | ||
} | ||
// TODO: need to support '--resource-pkg-path' flag for specifying resourcePath | ||
} | ||
return path.Join(in.Repo, "api"), r.Group + "." + in.Domain | ||
} |
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