add tool: mt-gen-key

fix #1289

Author: Dieterbe

cmd/mt-gen-key/main.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"runtime"
+
+	"github.com/grafana/metrictank/logger"
+	"github.com/grafana/metrictank/schema"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	version     string
+	showVersion = flag.Bool("version", false, "print version string")
+)
+
+func init() {
+	formatter := &logger.TextFormatter{}
+	formatter.TimestampFormat = "2006-01-02 15:04:05.000"
+	log.SetFormatter(formatter)
+	log.SetLevel(log.InfoLevel)
+}
+
+func main() {
+
+	flag.Usage = func() {
+		fmt.Println("mt-get-key")
+		fmt.Println()
+		fmt.Println("mt-gen-key gives you the MKey for a specific MetricDefinition")
+		fmt.Println("It fills a temp file with a template MetricDefinition")
+		fmt.Println("It launches vim")
+		fmt.Println("You fill in the important details - name / interval / tags /...")
+		fmt.Println("It prints the MKey")
+		fmt.Println()
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	if *showVersion {
+		fmt.Printf("mt-view-boundaries (version: %s - runtime: %s)\n", version, runtime.Version())
+		return
+	}
+	d := schema.MetricDefinition{
+		Unit:  "unknown",
+		Mtype: "gauge",
+	}
+
+	var data []byte
+	var err error
+	var f *os.File
+
+	if data, err = json.MarshalIndent(d, "", "    "); err != nil {
+		log.Fatal(err)
+	}
+	if f, err = ioutil.TempFile("", "mt-gen-metricid"); err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println("using file", f.Name())
+	defer os.Remove(f.Name())
+
+	if _, err = f.Write(data); err != nil {
+		log.Fatal(err)
+	}
+	if err := f.Close(); err != nil {
+		log.Fatal(err)
+	}
+	cmd := exec.Command("vim", f.Name())
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err = cmd.Start(); err != nil {
+		log.Fatal(err)
+	}
+	if err = cmd.Wait(); err != nil {
+		log.Printf("Error while editing. Error: %v\n", err)
+	} else {
+		log.Printf("Successfully edited.")
+	}
+
+	data, err = ioutil.ReadFile(f.Name())
+	if err != nil {
+		log.Fatal(err)
+	}
+	json.Unmarshal(data, &d)
+	d.SetId()
+	fmt.Println(d.Id.String())
+}

docs/tools.md

@@ -44,6 +44,22 @@ Example:
 ```
 
 
+## mt-gen-key
+
+```
+mt-get-key
+
+mt-gen-key gives you the MKey for a specific MetricDefinition
+It fills a temp file with a template MetricDefinition
+It launches vim
+You fill in the important details - name / interval / tags /...
+It prints the MKey
+
+  -version
+    	print version string
+```
+
+
 ## mt-index-cat
 
 ```