add bootstrap kubeconfig to the osm bootstraping (#1156)

Signed-off-by: Moath Qasim <[email protected]>

pkg/controller/machine/bootstrap.go

@@ -31,6 +31,7 @@ import (
 	providerconfigtypes "github.com/kubermatic/machine-controller/pkg/providerconfig/types"
 	"github.com/kubermatic/machine-controller/pkg/userdata/convert"
 	"github.com/kubermatic/machine-controller/pkg/userdata/flatcar"
+	"github.com/kubermatic/machine-controller/pkg/userdata/helper"
 
 	ctrlruntimeclient "sigs.k8s.io/controller-runtime/pkg/client"
 )
@@ -55,14 +56,14 @@ func getOSMBootstrapUserdata(ctx context.Context, client ctrlruntimeclient.Clien
 
 	// Ignition configuration is used for flatcar
 	if useIgnition(pconfig) {
-		return getOSMBootstrapUserDataForIgnition(ctx, req, pconfig.SSHPublicKeys, token, secretName, clusterName)
+		return getOSMBootstrapUserDataForIgnition(req, pconfig.SSHPublicKeys, token, secretName, clusterName)
 	}
 	// cloud-init is used for all other operating systems
-	return getOSMBootstrapUserDataForCloudInit(ctx, req, pconfig, token, secretName, clusterName)
+	return getOSMBootstrapUserDataForCloudInit(req, pconfig, token, secretName, clusterName)
 }
 
 // getOSMBootstrapUserDataForIgnition returns the userdata for the ignition bootstrap config
-func getOSMBootstrapUserDataForIgnition(ctx context.Context, req plugin.UserDataRequest, sshPublicKeys []string, token, secretName, clusterName string) (string, error) {
+func getOSMBootstrapUserDataForIgnition(req plugin.UserDataRequest, sshPublicKeys []string, token, secretName, clusterName string) (string, error) {
 	data := struct {
 		Token      string
 		SecretName string
@@ -106,7 +107,7 @@ func getOSMBootstrapUserDataForIgnition(ctx context.Context, req plugin.UserData
 }
 
 // getOSMBootstrapUserDataForCloudInit returns the userdata for the cloud-init bootstrap script
-func getOSMBootstrapUserDataForCloudInit(ctx context.Context, req plugin.UserDataRequest, pconfig *providerconfigtypes.Config, token, secretName, clusterName string) (string, error) {
+func getOSMBootstrapUserDataForCloudInit(req plugin.UserDataRequest, pconfig *providerconfigtypes.Config, token, secretName, clusterName string) (string, error) {
 	data := struct {
 		Token           string
 		SecretName      string
@@ -166,17 +167,24 @@ func getOSMBootstrapUserDataForCloudInit(ctx context.Context, req plugin.UserDat
 		return "", fmt.Errorf("failed to parse download-binaries template: %v", err)
 	}
 
+	bootstrapKubeconfig, err := helper.StringifyKubeconfig(req.Kubeconfig)
+	if err != nil {
+		return "", fmt.Errorf("failed to format bootstrap kubeconfig: %v", err)
+	}
+
 	cloudInit := &bytes.Buffer{}
 	err = bsCloudInit.Execute(cloudInit, struct {
 		Script  string
 		Service string
 		plugin.UserDataRequest
-		ProviderSpec *providerconfigtypes.Config
+		ProviderSpec        *providerconfigtypes.Config
+		BootstrapKubeconfig string
 	}{
-		Script:          base64.StdEncoding.EncodeToString(script.Bytes()),
-		Service:         base64.StdEncoding.EncodeToString([]byte(bootstrapServiceContentTemplate)),
-		UserDataRequest: req,
-		ProviderSpec:    pconfig,
+		Script:              base64.StdEncoding.EncodeToString(script.Bytes()),
+		Service:             base64.StdEncoding.EncodeToString([]byte(bootstrapServiceContentTemplate)),
+		UserDataRequest:     req,
+		ProviderSpec:        pconfig,
+		BootstrapKubeconfig: base64.StdEncoding.EncodeToString([]byte(bootstrapKubeconfig)),
 	})
 	if err != nil {
 		return "", fmt.Errorf("failed to execute cloudInitTemplate template: %v", err)
@@ -293,6 +301,11 @@ write_files:
   encoding: b64
   content: |
     {{ .Script }}
+- path: /etc/kubernetes/bootstrap-kubelet.conf
+  permissions: '0600'
+  encoding: b64
+  content: | 
+    {{ .BootstrapKubeconfig }}
 - path: /etc/systemd/system/bootstrap.service
   permissions: '0644'
   encoding: b64
@@ -331,6 +344,12 @@ reboot
 {{- end }}
 storage:
   files:
+  - path: /etc/kubernetes/bootstrap-kubelet.conf
+    mode: 0600
+    filesystem: root
+    contents:
+      inline: |
+      {{ .BootstrapKubeconfig }}
   - path: /opt/bin/bootstrap
     mode: 0755
     filesystem: root