Add version command (minio#511)

Also remove additional flags from the proxy command.

Fixes minio#502
Fixes minio#478

Co-authored-by: Daniel Valdivia <[email protected]>

Author: nitisht

kubectl-minio/cmd/kubectl-minio.go

@@ -66,5 +66,6 @@ func NewCmdMinIO(streams genericclioptions.IOStreams) *cobra.Command {
 	rootCmd.AddCommand(newTenantCmd(rootCmd.OutOrStdout(), rootCmd.ErrOrStderr()))
 	rootCmd.AddCommand(newDeleteCmd(rootCmd.OutOrStdout(), rootCmd.ErrOrStderr()))
 	rootCmd.AddCommand(newProxyCmd(rootCmd.OutOrStdout(), rootCmd.ErrOrStderr()))
+	rootCmd.AddCommand(newVersionCmd(rootCmd.OutOrStdout(), rootCmd.ErrOrStderr()))
 	return rootCmd
 }

kubectl-minio/cmd/proxy.go

@@ -76,12 +76,7 @@ func newProxyCmd(out io.Writer, errOut io.Writer) *cobra.Command {
 	}
 	cmd = helpers.DisableHelp(cmd)
 	f := cmd.Flags()
-	f.StringVarP(&o.operatorOpts.Image, "image", "i", helpers.DefaultOperatorImage, "operator image")
 	f.StringVarP(&o.operatorOpts.Namespace, "namespace", "n", helpers.DefaultNamespace, "namespace scope for this request")
-	f.StringVarP(&o.operatorOpts.ClusterDomain, "cluster-domain", "d", helpers.DefaultClusterDomain, "cluster domain of the Kubernetes cluster")
-	f.StringVar(&o.operatorOpts.NSToWatch, "namespace-to-watch", "", "namespace where operator looks for MinIO tenants, leave empty for all namespaces")
-	f.StringVar(&o.operatorOpts.ImagePullSecret, "image-pull-secret", "", "image pull secret to be used for pulling operator image")
-	f.BoolVarP(&o.output, "output", "o", false, "dry run this command and generate requisite yaml")
 
 	return cmd
 }

kubectl-minio/cmd/version.go

@@ -0,0 +1,76 @@
+/*
+ * This file is part of MinIO Operator
+ * Copyright (C) 2021, MinIO, Inc.
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"k8s.io/klog/v2"
+
+	"github.com/minio/kubectl-minio/cmd/helpers"
+	"github.com/spf13/cobra"
+)
+
+// version provides the version of this plugin
+var version = "DEVELOPMENT.GOGET"
+
+const (
+	operatorVersionDesc = `
+'version' command displays the kubectl plugin version.`
+	operatorVersionExample = `  kubectl minio version`
+)
+
+type operatorVersionCmd struct {
+	out    io.Writer
+	errOut io.Writer
+	output bool
+}
+
+func newVersionCmd(out io.Writer, errOut io.Writer) *cobra.Command {
+	o := &operatorVersionCmd{out: out, errOut: errOut}
+
+	cmd := &cobra.Command{
+		Use:     "version",
+		Short:   "Display plugin version",
+		Long:    operatorVersionDesc,
+		Example: operatorVersionExample,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if len(args) != 0 {
+				return errors.New("this command does not accept arguments")
+			}
+			err := o.run()
+			if err != nil {
+				klog.Warning(err)
+				return err
+			}
+			return nil
+		},
+	}
+	cmd = helpers.DisableHelp(cmd)
+
+	return cmd
+}
+
+// run initializes local config and installs MinIO Operator to Kubernetes cluster.
+func (o *operatorVersionCmd) run() error {
+	fmt.Println(version)
+	return nil
+}