Allow to register a cluster with one command

The sveltosctl register command is used to register a cluster.
It requires a Kubeconfig to be passed.

If user has a kubeconfig with multiple contexts, the option __fleet-cluster-context__
allows to specify the context for the cluster to be managed.

So with default context pointing to the management cluster, following command will:
1. create a ServiceAccount in the managed cluster (using cluster-1 context)
2. grant this ServiceAccount cluster-admin permission
3. create a TokenRequest for such account and a Kubeconfig with bearer token from the TokenRequest
4. create a SveltosCluster in the management cluster (so using default context) and a Secret
with kubeconfig generated in the step above

```
sveltosctl register cluster --namespace=gcp --cluster=cluster-1 --fleet-cluster-context=cluster-1 --labels=k1=v1,k2=v2
```

README.md

@@ -116,6 +116,22 @@ Usage:
      --profile=<kind/name>  Show addons deployed because of this clusterprofile/profile. If not specified all clusterprofiles/profiles are considered.
 ```
 
+## Register a cluster
+
+If there is kubeconfig with multiple contexts, the option __fleet-cluster-context__
+allows to specify the context for the cluster to be managed.
+
+So with default context pointing to the management cluster, following command will:
+1. create a ServiceAccount in the managed cluster (using cluster-1 context)
+2. grant this ServiceAccount cluster-admin permission
+3. create a TokenRequest for such account and a Kubeconfig with bearer token from the TokenRequest
+4. create a SveltosCluster in the management cluster (so using default context) and a Secret
+with kubeconfig generated in the step above
+
+```
+sveltosctl register cluster --namespace=gcp --cluster=cluster-1 --fleet-cluster-context=cluster-1 --labels=k1=v1,k2=v2
+```
+
 ## Display information about resources in managed cluster
 
 **show resources** looks at all the HealthCheckReport instances and display information about those.

go.mod

@@ -1,6 +1,8 @@
 module github.com/projectsveltos/sveltosctl
 
-go 1.21
+go 1.22.0
+
+toolchain go1.22.2
 
 require (
 	github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
@@ -14,7 +16,7 @@ require (
 	github.com/pkg/errors v0.9.1
 	github.com/projectsveltos/addon-controller v0.27.1-0.20240405170833-7fa049caf6a3
 	github.com/projectsveltos/event-manager v0.26.1-0.20240315124018-bf7536defbe2
-	github.com/projectsveltos/libsveltos v0.27.1-0.20240405132615-9e1a36ca5c8f
+	github.com/projectsveltos/libsveltos v0.27.1-0.20240414121914-1eb0b89fc6c9
 	github.com/robfig/cron/v3 v3.0.1
 	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/api v0.29.3
@@ -24,7 +26,7 @@ require (
 	k8s.io/klog/v2 v2.120.1
 	k8s.io/kubectl v0.29.3
 	sigs.k8s.io/cluster-api v1.6.3
-	sigs.k8s.io/controller-runtime v0.17.2
+	sigs.k8s.io/controller-runtime v0.17.3
 	sigs.k8s.io/yaml v1.4.0
 )
 

go.sum

@@ -336,8 +336,8 @@ github.com/projectsveltos/addon-controller v0.27.1-0.20240405170833-7fa049caf6a3
 github.com/projectsveltos/addon-controller v0.27.1-0.20240405170833-7fa049caf6a3/go.mod h1:i9dFWaOrVzQSPXyACKxBkcgq3eH8TmlGw0DIFvWizVI=
 github.com/projectsveltos/event-manager v0.26.1-0.20240315124018-bf7536defbe2 h1:vbwFY8ag5X+yJ42q88Q/dyWfodpRtExhdSrNRYtmMVs=
 github.com/projectsveltos/event-manager v0.26.1-0.20240315124018-bf7536defbe2/go.mod h1:jsdBg7hvxOqX0dwtgffrodJWKDKVttX/GYp2+fWsL+U=
-github.com/projectsveltos/libsveltos v0.27.1-0.20240405132615-9e1a36ca5c8f h1:FCmjCYxO/5irmocHXcuVfg9fT74NoN1G4k64/SwWdMo=
-github.com/projectsveltos/libsveltos v0.27.1-0.20240405132615-9e1a36ca5c8f/go.mod h1:Uq3KYj5LKQYttA3yVb0O/V5Uvi2Qy7B23tnB5fBAMFg=
+github.com/projectsveltos/libsveltos v0.27.1-0.20240414121914-1eb0b89fc6c9 h1:RYqAVU6cXVWniqDJGuWRFOzA5xgH3zasf2O11W7hYNw=
+github.com/projectsveltos/libsveltos v0.27.1-0.20240414121914-1eb0b89fc6c9/go.mod h1:DVMv0DUlZ2x21jq7Z+LJvs7HesSe/pWsHZgQLV3Mhjw=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.1.0/go.mod h1:I1FGZT9+L76gKKOs5djB6ezCbFQP1xR9D75/vuwEF3g=
@@ -587,8 +587,8 @@ oras.land/oras-go v1.2.4 h1:djpBY2/2Cs1PV87GSJlxv4voajVOMZxqqtq9AB8YNvY=
 oras.land/oras-go v1.2.4/go.mod h1:DYcGfb3YF1nKjcezfX2SNlDAeQFKSXmf+qrFmrh4324=
 sigs.k8s.io/cluster-api v1.6.3 h1:VOlPNg92PQLlhBVLc5pg+cbAuPvGOOBujeFLk9zgnoo=
 sigs.k8s.io/cluster-api v1.6.3/go.mod h1:4FzfgPPiYaFq8X9F9j2SvmggH/4OOLEDgVJuWDqKLig=
-sigs.k8s.io/controller-runtime v0.17.2 h1:FwHwD1CTUemg0pW2otk7/U5/i5m2ymzvOXdbeGOUvw0=
-sigs.k8s.io/controller-runtime v0.17.2/go.mod h1:+MngTvIQQQhfXtwfdGw/UOQ/aIaqsYywfCINOtwMO/s=
+sigs.k8s.io/controller-runtime v0.17.3 h1:65QmN7r3FWgTxDMz9fvGnO1kbf2nu+acg9p2R9oYYYk=
+sigs.k8s.io/controller-runtime v0.17.3/go.mod h1:N0jpP5Lo7lMTF9aL56Z/B2oWBJjey6StQM0jRbKQXtY=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/kustomize/api v0.16.0 h1:/zAR4FOQDCkgSDmVzV2uiFbuy9bhu3jEzthrHCuvm1g=

internal/commands/generate/export_test.go

@@ -16,10 +16,6 @@ limitations under the License.
 
 package generate
 
-const (
-	Projectsveltos = projectsveltos
-)
-
 var (
 	CreateNamespace          = createNamespace
 	CreateClusterRole        = createClusterRole

internal/commands/generate/generate_kubeconfig.go

@@ -39,45 +39,47 @@ import (
 )
 
 const (
-	projectsveltos = "projectsveltos"
+	Projectsveltos = "projectsveltos"
 )
 
-func generateKubeconfigForServiceAccount(ctx context.Context, namespace, serviceAccountName string,
-	expirationSeconds int, create bool, logger logr.Logger) error {
+func GenerateKubeconfigForServiceAccount(ctx context.Context, namespace, serviceAccountName string,
+	expirationSeconds int, create, display bool, logger logr.Logger) (string, error) {
 
 	if create {
 		if err := createNamespace(ctx, namespace, logger); err != nil {
-			return err
+			return "", err
 		}
 		if err := createServiceAccount(ctx, namespace, serviceAccountName, logger); err != nil {
-			return err
+			return "", err
 		}
-		if err := createClusterRole(ctx, projectsveltos, logger); err != nil {
-			return err
+		if err := createClusterRole(ctx, Projectsveltos, logger); err != nil {
+			return "", err
 		}
-		if err := createClusterRoleBinding(ctx, projectsveltos, projectsveltos, namespace, serviceAccountName, logger); err != nil {
-			return err
+		if err := createClusterRoleBinding(ctx, Projectsveltos, Projectsveltos, namespace, serviceAccountName, logger); err != nil {
+			return "", err
 		}
 	} else {
 		if err := getNamespace(ctx, namespace); err != nil {
-			return err
+			return "", err
 		}
 		if err := getServiceAccount(ctx, namespace, serviceAccountName); err != nil {
-			return err
+			return "", err
 		}
 	}
 
 	tokenRequest, err := getServiceAccountTokenRequest(ctx, namespace, serviceAccountName, expirationSeconds, logger)
 	if err != nil {
-		return err
+		return "", err
 	}
 
 	logger.V(logs.LogDebug).Info("Get Kubeconfig from TokenRequest")
 	data := getKubeconfigFromToken(namespace, serviceAccountName, tokenRequest.Token)
-	//nolint: forbidigo // print kubeconfig
-	fmt.Println(data)
+	if display {
+		//nolint: forbidigo // print kubeconfig
+		fmt.Println(data)
+	}
 
-	return nil
+	return data, nil
 }
 
 func getNamespace(ctx context.Context, name string) error {
@@ -325,12 +327,12 @@ or create a new one with the necessary permissions.
 		}
 	}
 
-	namespace := projectsveltos
+	namespace := Projectsveltos
 	if passedNamespace := parsedArgs["--namespace"]; passedNamespace != nil {
 		namespace = passedNamespace.(string)
 	}
 
-	serviceAccount := projectsveltos
+	serviceAccount := Projectsveltos
 	if passedServiceAccount := parsedArgs["--serviceaccount"]; passedServiceAccount != nil {
 		serviceAccount = passedServiceAccount.(string)
 	}
@@ -345,6 +347,7 @@ or create a new one with the necessary permissions.
 
 	create := parsedArgs["--create"].(bool)
 
-	return generateKubeconfigForServiceAccount(ctx, namespace, serviceAccount, expirationSeconds,
-		create, logger)
+	_, err = GenerateKubeconfigForServiceAccount(ctx, namespace, serviceAccount, expirationSeconds,
+		create, true, logger)
+	return err
 }