add backup loki option

internal/backup/cmd/backup.go

@@ -17,6 +17,7 @@ limitations under the License.
 package backup
 
 import (
+	"github.com/deckhouse/deckhouse-cli/internal/backup/cmd/loki"
 	"github.com/spf13/cobra"
 	"k8s.io/kubectl/pkg/util/templates"
 
@@ -41,6 +42,7 @@ func NewCommand() *cobra.Command {
 	backupCmd.AddCommand(
 		etcd.NewCommand(),
 		cluster_config.NewCommand(),
+		loki.NewCommand(),
 	)
 
 	return backupCmd

internal/backup/cmd/loki/flags.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2024 Flant JSC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package loki
+
+import (
+	"fmt"
+	"github.com/spf13/pflag"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+func addFlags(flagSet *pflag.FlagSet) {
+	flagSet.StringVar(
+		&endTimestamp,
+		"end",
+		"",
+		"Set end timestamp range to dump logs from Loki. (Default get max end timestamp from Loki, ex. \"2025-01-14 15:04:05\".)",
+	)
+	flagSet.StringVar(
+		&startTimestamp,
+		"start",
+		"",
+		"Set start timestamp range to dump logs from Loki. (Default get max start timestamp from Loki, ex. \"2025-01-12 15:04:05\".)",
+	)
+	flagSet.StringVar(
+		&limitFlag,
+		"limit",
+		"",
+		"Limit max string to output per queue from Loki. (Default 100000 max limit strings per queue.)",
+	)
+}
+
+func validateFlags(cmd *cobra.Command) error {
+	kubeconfigPath, err := cmd.Flags().GetString("kubeconfig")
+	if err != nil {
+		return fmt.Errorf("Failed to setup Kubernetes client: %w", err)
+	}
+
+	stats, err := os.Stat(kubeconfigPath)
+	if err != nil {
+		return fmt.Errorf("Invalid --kubeconfig: %w", err)
+	}
+	if !stats.Mode().IsRegular() {
+		return fmt.Errorf("Invalid --kubeconfig: %s is not a regular file", kubeconfigPath)
+	}
+
+	return nil
+}