Script to flush Prometheus WAL data to block

tools/prometheus-flush.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/go-kit/log"
+	"github.com/prometheus/prometheus/tsdb"
+	"os"
+)
+
+func main() {
+	path := flag.String("path", "./data", "Path to Prometheus database")
+	flag.Parse()
+
+	sandbox := *path + "-sandbox"
+	output := *path + "-output"
+
+	if _, err := os.Stat(*path); err != nil {
+		fmt.Printf("Error: Unable to find database directory: %v\n", err)
+		return
+	}
+
+	logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stdout))
+	db, err := tsdb.OpenDBReadOnly(*path, sandbox, logger)
+	if err != nil {
+		fmt.Printf("Error: Unable to open Prometheus database: %v\n", err)
+		return
+	}
+
+	err = db.FlushWAL(output)
+	if err != nil {
+		fmt.Println("Error: Failed to flush WAL: %v\n", err)
+		return
+	}
+}