fix: etcd install fail (#156)

* fix: etcd install fail

* refactor: change kubeversion name

* style: sort package

* refactor: add default kube version v1.20.0

pkg/helm/helm.go

@@ -31,6 +31,7 @@ import (
 	"helm.sh/helm/v3/pkg/action"
 	"helm.sh/helm/v3/pkg/chart"
 	"helm.sh/helm/v3/pkg/chart/loader"
+	"helm.sh/helm/v3/pkg/chartutil"
 	"helm.sh/helm/v3/pkg/cli"
 	"helm.sh/helm/v3/pkg/registry"
 	. "helm.sh/helm/v3/pkg/repo"
@@ -45,6 +46,11 @@ const (
 	helmFieldTag = "helm"
 )
 
+var (
+	// KubeVersion is the target version of the kubernetes.
+	KubeVersion string = "v1.20.0"
+)
+
 // Manager is the Helm charts manager. The implementation is based on Helm SDK.
 // The main purpose of Manager is:
 // 1. Load the chart from remote charts and save them in cache directory.
@@ -318,13 +324,19 @@ func (r *Manager) isInChartsCache(packageName string) bool {
 }
 
 func (r *Manager) newHelmClient(releaseName, namespace string) (*action.Install, error) {
+	kubeVersion, err := chartutil.ParseKubeVersion(KubeVersion)
+	if err != nil {
+		return nil, fmt.Errorf("invalid kube version '%s': %s", kubeVersion, err)
+	}
+
 	helmClient := action.NewInstall(new(action.Configuration))
 	helmClient.DryRun = true
 	helmClient.ReleaseName = releaseName
 	helmClient.Replace = true
 	helmClient.ClientOnly = true
 	helmClient.IncludeCRDs = true
 	helmClient.Namespace = namespace
+	helmClient.KubeVersion = kubeVersion
 
 	return helmClient, nil
 }

pkg/kube/client.go

@@ -42,6 +42,8 @@ import (
 	"k8s.io/client-go/util/homedir"
 
 	greptimev1alpha1 "github.com/GreptimeTeam/greptimedb-operator/apis/v1alpha1"
+
+	"github.com/GreptimeTeam/gtctl/pkg/helm"
 )
 
 type Client struct {
@@ -103,6 +105,12 @@ func NewClient(kubeconfig string) (*Client, error) {
 		}
 	})
 
+	kubeVersion, err := kubeClient.ServerVersion()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get kubernetes server version: %v\n", err)
+	}
+	helm.KubeVersion = kubeVersion.String()
+
 	return &Client{
 		kubeClient:        kubeClient,
 		dynamicKubeClient: dynamicKubeClient,