PrasadG193 / kyaml2go

K8s Go client code generator from Kubernetes resource yamls

kyaml2go _{(Pronounced as camel2go 🐫)}

https://kyaml2go.prasadg.dev

Go client code generator from Kubernetes resource specs yaml

Supported resources

List of supported Kinds and Groups can be found here: https://github.com/PrasadG193/kyaml2go/blob/master/pkg/kube/map.go#L38

kyaml2go also supports Custom Resources compatible with client-go v0.18.5 dep

Installation

Docker

docker run --rm -i ghcr.io/prasadg193/kyaml2go:latest create < testdata/secrets.yaml

Install From Source

Step 1: Clone the repo

$ git clone https://github.com/PrasadG193/kyaml2go.git

Step 2: Build binary using make

$ make

Usage

kyaml2go is available at https://kyaml2go.prasadg.dev

Alternatively, you can also use CLI or docker image to generate code

$ kyaml2go --help
NAME:
   kyaml2go - Generate go code to manage Kubernetes resources using go-client sdks

USAGE:
   kyaml2go [global options] command [command options] [arguments...]

VERSION:
   0.0.0

COMMANDS:
   create   Generate code for creating a resource
   update   Generate code for updating a resource
   get      Generate code to get a resource object
   delete   Generate code for deleting a resource
   help, h  Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h     show help
   --version, -v  print the version


$ kyaml2go create --help
NAME:
   kyaml2go create - Generate code for creating a resource

USAGE:
   kyaml2go create [command options] [arguments...]

OPTIONS:
   --cr                      Resource is a Custom resource
   --apis value              Custom resource api def package (without version)
   --client value, -c value  Custom resource typed client package name
   --scheme value, -s value  Custom resource scheme package name

Examples

Generating code for native resources

$ docker run --rm -i ghcr.io/prasadg193/kyaml2go:latest create < testdata/secrets.yaml

// Auto-generated by kyaml2go - https://github.com/PrasadG193/kyaml2go
package main

import (
        "context"
        "fmt"
        corev1 "k8s.io/api/core/v1"
        metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
        clientset "k8s.io/client-go/kubernetes"
        "k8s.io/client-go/tools/clientcmd"
        "k8s.io/client-go/util/homedir"
        "os"
        "path/filepath"
)

func main() {
        // Create client
        var kubeconfig string
        kubeconfig, ok := os.LookupEnv("KUBECONFIG")
        if !ok {
                kubeconfig = filepath.Join(homedir.HomeDir(), ".kube", "config")
        }

        config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
        if err != nil {
                panic(err)
        }
        client, err := clientset.NewForConfig(config)
        if err != nil {
                panic(err)
        }
        kubeclient := client.CoreV1().Secrets("default")

        // Create resource object
        object := &corev1.Secret{
                TypeMeta: metav1.TypeMeta{
                        Kind:       "Secret",
                        APIVersion: "v1",
                },
                ObjectMeta: metav1.ObjectMeta{
                        Name: "test-secret",
                },
                StringData: map[string]string{
                        "password": "1f2d1e2e67df",
                        "username": "admin",
                },
                Type: corev1.SecretType("Opaque"),
        }

        // Manage resource
        _, err = kubeclient.Create(context.TODO(), object, metav1.CreateOptions{})
        if err != nil {
                panic(err)
        }
        fmt.Println("Secret Created successfully!")
}

Generating code for custom resources

$ docker run --rm -i ghcr.io/prasadg193/kyaml2go:latest create --cr --scheme "k8s.io/sample-controller/pkg/generated/clientset/versioned/scheme" --apis "k8s.io/sample-controller/pkg/apis/samplecontroller" --client "k8s.io/sample-controller/pkg/generated/clientset/versioned" < testdata/crs/foo.yaml

// Auto-generated by kyaml2go - https://github.com/PrasadG193/kyaml2go
package main

import (
        "context"
        "fmt"
        metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
        "k8s.io/client-go/tools/clientcmd"
        "k8s.io/client-go/util/homedir"
        samplecontrollerv1alpha1 "k8s.io/sample-controller/pkg/apis/samplecontroller/v1alpha1"
        clientset "k8s.io/sample-controller/pkg/generated/clientset/versioned"
        "os"
        "path/filepath"
)

func main() {
        // Create client
        var kubeconfig string
        kubeconfig, ok := os.LookupEnv("KUBECONFIG")
        if !ok {
                kubeconfig = filepath.Join(homedir.HomeDir(), ".kube", "config")
        }

        config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
        if err != nil {
                panic(err)
        }
        client, err := clientset.NewForConfig(config)
        if err != nil {
                panic(err)
        }
        kubeclient := client.SamplecontrollerV1alpha1().Foos("default")

        // Create resource object
        object := &samplecontrollerv1alpha1.Foo{
                TypeMeta: metav1.TypeMeta{
                        Kind:       "Foo",
                        APIVersion: "samplecontroller.k8s.io/v1alpha1",
                },
                ObjectMeta: metav1.ObjectMeta{
                        Name: "example-foo",
                },
                Spec: samplecontrollerv1alpha1.FooSpec{
                        DeploymentName: "example-foo",
                        Replicas:       ptrint32(1),
                },
        }

        // Manage resource
        _, err = kubeclient.Create(context.TODO(), object, metav1.CreateOptions{})
        if err != nil {
                panic(err)
        }
        fmt.Println("Foo Created successfully!")
}

func ptrint32(p int32) *int32 {
        return &p
}

Workflow/Algorithm:

End-to-end workflow and algorithm to find imports can be found here

Contributing

We love your input! We want to make contributing to this project as easy and transparent as possible, whether it's:

• Reporting a bug
• Discussing the current state of the code
• Submitting a fix
• Proposing new features

Credits

The Go Gopher is originally by Renee French

This artwork is borrowed from an awesome artwork collection by Egon Elbre