fix(wal): Move WAL disk check to platform-specific code (#19619)

Author: paul1r

pkg/ingester/wal.go

@@ -4,7 +4,6 @@ import (
 	"flag"
 	"fmt"
 	"sync"
-	"syscall"
 	"time"
 
 	"go.uber.org/atomic"
@@ -170,22 +169,6 @@ func (w *walWrapper) checkpointWriter() *WALCheckpointWriter {
 	}
 }
 
-// checkDiskUsage returns the disk usage percentage (0.0 to 1.0) for the WAL directory.
-func (w *walWrapper) checkDiskUsage() (float64, error) {
-	var stat syscall.Statfs_t
-	if err := syscall.Statfs(w.cfg.Dir, &stat); err != nil {
-		return 0, err
-	}
-
-	// Calculate usage percentage
-	total := stat.Blocks * uint64(stat.Bsize)
-	free := stat.Bfree * uint64(stat.Bsize)
-	used := total - free
-	usagePercent := float64(used) / float64(total)
-
-	return usagePercent, nil
-}
-
 func (w *walWrapper) run() {
 	level.Info(util_log.Logger).Log("msg", "started", "component", "wal")
 	defer w.wait.Done()

pkg/ingester/wal_unix.go

@@ -0,0 +1,23 @@
+//go:build !windows
+
+package ingester
+
+import (
+	"syscall"
+)
+
+// checkDiskUsage returns the disk usage percentage (0.0 to 1.0) for the WAL directory.
+func (w *walWrapper) checkDiskUsage() (float64, error) {
+	var stat syscall.Statfs_t
+	if err := syscall.Statfs(w.cfg.Dir, &stat); err != nil {
+		return 0, err
+	}
+
+	// Calculate usage percentage
+	total := stat.Blocks * uint64(stat.Bsize)
+	free := stat.Bfree * uint64(stat.Bsize)
+	used := total - free
+	usagePercent := float64(used) / float64(total)
+
+	return usagePercent, nil
+}

pkg/ingester/wal_windows.go

@@ -0,0 +1,18 @@
+//go:build windows
+
+package ingester
+
+import (
+	"syscall"
+)
+
+var (
+	kernel32               = syscall.NewLazyDLL("kernel32.dll")
+	procGetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")
+)
+
+// checkDiskUsage returns the disk usage percentage (0.0 to 1.0) for the WAL directory.
+func (w *walWrapper) checkDiskUsage() (float64, error) {
+	// Disable this for Windows for now
+	return 0.0, nil
+}