helm-client.go

package main

import (
	"context"
	"fmt"
	"io/ioutil"
	"log"

	hgc "github.com/mittwald/go-helm-client"
	"helm.sh/helm/v3/pkg/repo"
)

func main() {
	hc := getclient()
	//updatechartrepo(hc)
	installChart(hc)

}

func updatechartrepo(hc hgc.Client) {
	chartRepo := repo.Entry{
		Name: "longhorn",
		URL:  "https://charts.longhorn.io",
	}

	// Add a chart-repository to the client
	if err := hc.AddOrUpdateChartRepo(chartRepo); err != nil {
		fmt.Printf("failed update chart: %+v\n", err)
		panic(err)
	}
	template(hc)
}

func getclient() hgc.Client {
	data, err := ioutil.ReadFile("/home/jdg/k3s-kube-config")
	if err != nil {
		log.Fatalf("Failed to read in kubeconfig: %+v\n", err)
	}
	opt := &hgc.KubeConfClientOptions{
		Options: &hgc.Options{
			RepositoryCache:  "/tmp/.helmcache",
			RepositoryConfig: "/tmp/.helmrepo",
			Debug:            true,
			Linting:          true,
		},
		KubeContext: "",
		KubeConfig:  data,
	}

	helmClient, err := hgc.NewClientFromKubeConf(opt)
	if err != nil {
		fmt.Printf("failed get client: %+v\n", err)
		panic(err)
	}
	return helmClient
}

func template(hc hgc.Client) {
	chartSpec := hgc.ChartSpec{
		ReleaseName: "longhorn",
		ChartName:   "https://github.com/longhorn/charts/releases/download/longhorn-1.0.0/longhorn-1.0.0.tgz",
		Namespace:   "longhorn-system",
		UpgradeCRDs: true,
		Wait:        true,
	}

	out, err := hc.TemplateChart(&chartSpec)
	if err != nil {
		fmt.Printf("failed template: %+v\n", err)
		panic(err)
	}
	fmt.Printf("Output:\n%v\n", string(out))
}

func installChart(hc hgc.Client) {
	chartSpec := hgc.ChartSpec{
		ReleaseName: "longhorn",
		ChartName:   "https://github.com/longhorn/charts/releases/download/longhorn-1.0.0/longhorn-1.0.0.tgz",
		Namespace:   "longhorn-system",
	}

	fmt.Println("Try the install...")
	if err, _ := hc.InstallOrUpgradeChart(context.Background(), &chartSpec); err != nil {
		fmt.Printf("failed install/upgrade: %+v\n", err)
		panic(err)
	}
}