tetra: add info command

Signed-off-by: Kornilios Kourtis <[email protected]>

Author: kkourt

cmd/tetra/commands.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/cilium/tetragon/cmd/tetra/explain"
 	"github.com/cilium/tetragon/cmd/tetra/getevents"
+	"github.com/cilium/tetragon/cmd/tetra/info"
 	"github.com/cilium/tetragon/cmd/tetra/rthooks"
 	"github.com/cilium/tetragon/cmd/tetra/sensors"
 	"github.com/cilium/tetragon/cmd/tetra/stacktracetree"
@@ -25,6 +26,7 @@ func addBaseCommands(rootCmd *cobra.Command) {
 	rootCmd.AddCommand(status.New())
 	rootCmd.AddCommand(rthooks.New())
 	rootCmd.AddCommand(explain.New())
+	rootCmd.AddCommand(info.New())
 
 	// bugtool technically builds on darwin and windows but makes no sense since
 	// it's supposed to be run on the machine running Tetragon, using

cmd/tetra/info/info.go

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Authors of Hubble
+
+package info
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/cilium/tetragon/api/v1/tetragon"
+	"github.com/cilium/tetragon/cmd/tetra/common"
+	"github.com/cilium/tetragon/pkg/logger"
+	"github.com/cilium/tetragon/pkg/logger/logfields"
+	"github.com/cilium/tetragon/pkg/tetragoninfo"
+
+	"github.com/spf13/cobra"
+)
+
+func New() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "info",
+		Short: "Retrieve information from the server",
+		Args:  cobra.NoArgs,
+		Run: func(cmd *cobra.Command, _ []string) {
+			common.CliRunErr(
+				func(ctx context.Context, cli tetragon.FineGuidanceSensorsClient) {
+					res, err := cli.GetInfo(ctx, &tetragon.GetInfoRequest{})
+					if err != nil {
+						logger.GetLogger().Error("error retrieving server info", logfields.Error, err)
+						return
+					}
+
+					info := tetragoninfo.Decode(res)
+					b, err := json.Marshal(info)
+					if err != nil {
+						logger.GetLogger().Error("failed to generate json", logfields.Error, err)
+						return
+					}
+					cmd.Println(string(b))
+				},
+				func(err error) {
+					logger.GetLogger().Error("error retrieving server info", logfields.Error, err)
+				},
+			)
+		},
+	}
+	return cmd
+}