CRUD application with client-go and controller-runtime

assignments/assignment-1/client-go/go.mod

@@ -0,0 +1,49 @@
+module github.com/velotio-ajaykumbhar/client-go
+
+go 1.19
+
+require (
+	k8s.io/api v0.25.4
+	k8s.io/apimachinery v0.25.4
+	k8s.io/client-go v0.25.4
+)
+
+require (
+	github.com/PuerkitoBio/purell v1.1.1 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful/v3 v3.8.0 // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.19.5 // indirect
+	github.com/go-openapi/swag v0.19.14 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/gnostic v0.5.7-v3refs // indirect
+	github.com/google/gofuzz v1.1.0 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mailru/easyjson v0.7.6 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect
+	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8 // indirect
+	golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20220210224613-90d013bbcef8 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/klog/v2 v2.70.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20220803162953-67bda5d908f1 // indirect
+	k8s.io/utils v0.0.0-20220728103510-ee6ede2d64ed // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.2.0 // indirect
+)

assignments/assignment-1/client-go/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/velotio-ajaykumbhar/client-go/opration"
+)
+
+func init() {
+	opration.New()
+}
+
+func main() {
+	for {
+		var input int
+		fmt.Printf("Choose opration\n 1) Deployment\n 2) Service\n 3) ConfigMap \n Input : ")
+		fmt.Scanf("%d", &input)
+
+		switch input {
+		case 1:
+			opration.Deployment()
+		case 2:
+			opration.Service()
+		case 3:
+			opration.ConfigMap()
+		default:
+			fmt.Println("Invalid choice")
+		}
+	}
+}

assignments/assignment-1/client-go/opration/configmap.go

@@ -0,0 +1,87 @@
+package opration
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"text/tabwriter"
+
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func createConfigMap() {
+
+	configmap := &corev1.ConfigMap{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "ConfigMap",
+			APIVersion: "v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: configmapName,
+		},
+		Data: configData,
+	}
+
+	config, err := clientset.CoreV1().ConfigMaps("default").Create(context.Background(), configmap, metav1.CreateOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	fmt.Println("configmap", config.Name, "created")
+}
+
+func readConfigMap() {
+	configs, err := clientset.CoreV1().ConfigMaps("default").List(context.Background(), metav1.ListOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	writer := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', tabwriter.AlignRight)
+	format := "%v\t%v\n"
+
+	fmt.Fprintf(writer, format, "NAME")
+	for _, service := range configs.Items {
+
+		fmt.Fprintf(writer, format, service.Name)
+	}
+
+	writer.Flush()
+}
+
+func updateConfigMap() {
+
+	configmap := &corev1.ConfigMap{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "ConfigMap",
+			APIVersion: "v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: configmapName,
+		},
+		Data: configDataUpdated,
+	}
+
+	config, err := clientset.CoreV1().ConfigMaps("default").Update(context.Background(), configmap, metav1.UpdateOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	fmt.Println("configmap", config.Name, "updated")
+}
+
+func deleteConfigMap() {
+
+	err := clientset.CoreV1().ConfigMaps("default").Delete(context.Background(), configmapName, metav1.DeleteOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	fmt.Println("configmap", configmapName, "deleted")
+
+}

assignments/assignment-1/client-go/opration/deployment.go

@@ -0,0 +1,140 @@
+package opration
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"text/tabwriter"
+
+	v1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func createDeployment() {
+
+	createdeployment := &v1.Deployment{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "Deployment",
+			APIVersion: "app/v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: deployemntName,
+		},
+		Spec: v1.DeploymentSpec{
+			Replicas: &replicas,
+			Selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{
+					labelkey: labelvalue,
+				},
+			},
+			Template: corev1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						labelkey: labelvalue,
+					},
+				},
+				Spec: corev1.PodSpec{
+					Containers: []corev1.Container{
+						{
+							Name:  "pod",
+							Image: image,
+							Ports: []corev1.ContainerPort{
+								corev1.ContainerPort{
+									ContainerPort: port,
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	deployment, err := clientset.AppsV1().Deployments("default").Create(context.Background(), createdeployment, metav1.CreateOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	fmt.Println("deployment", deployment.Name, "created")
+}
+
+func readDeployment() {
+	deployments, err := clientset.AppsV1().Deployments("default").List(context.Background(), metav1.ListOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	writer := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', tabwriter.AlignRight)
+	format := "%v\t%v\n"
+
+	fmt.Fprintf(writer, format, "NAME", "READY")
+	for _, deployment := range deployments.Items {
+		status := fmt.Sprintf("%v/%v", deployment.Status.AvailableReplicas, deployment.Status.Replicas)
+
+		fmt.Fprintf(writer, format, deployment.Name, status)
+	}
+
+	writer.Flush()
+}
+
+func updateDeployment() {
+	createdeployment := &v1.Deployment{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "Deployment",
+			APIVersion: "app/v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: deployemntName,
+		},
+		Spec: v1.DeploymentSpec{
+			Replicas: &updatereplicase,
+			Selector: &metav1.LabelSelector{
+				MatchLabels: map[string]string{
+					labelkey: labelvalue,
+				},
+			},
+			Template: corev1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: map[string]string{
+						labelkey: labelvalue,
+					},
+				},
+				Spec: corev1.PodSpec{
+					Containers: []corev1.Container{
+						{
+							Name:  "pod",
+							Image: image,
+							Ports: []corev1.ContainerPort{
+								corev1.ContainerPort{
+									ContainerPort: port,
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	deployment, err := clientset.AppsV1().Deployments("default").Update(context.Background(), createdeployment, metav1.UpdateOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+
+	fmt.Println("deployment", deployment.Name, "updated")
+}
+
+func deleteDeployment() {
+
+	err := clientset.AppsV1().Deployments("default").Delete(context.Background(), deployemntName, metav1.DeleteOptions{})
+	if err != nil {
+		log.Println(err.Error())
+		return
+	}
+	fmt.Println("deployment", "name", "deleted")
+}