auto set LocalStorageCapacityIsolation for BTRFS

cmd/minikube/cmd/start_flags.go

@@ -518,6 +518,17 @@ func generateNewConfigFromFlags(cmd *cobra.Command, k8sVersion string, drvName s
 		}
 	}
 
+	if driver.IsDockerBTRFS(drvName) {
+		fg := "LocalStorageCapacityIsolation=false"
+		if !strings.Contains(cc.KubernetesConfig.FeatureGates, fg) {
+			klog.Info("auto-setting LocalStorageCapacityIsolation to false")
+			if len(cc.KubernetesConfig.FeatureGates) != 0 {
+				fg = "," + fg
+			}
+			cc.KubernetesConfig.FeatureGates += fg
+		}
+	}
+
 	return cc
 }
 

pkg/minikube/driver/driver.go

@@ -19,6 +19,7 @@ package driver
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"runtime"
 	"sort"
 	"strconv"
@@ -144,6 +145,24 @@ func IsDockerDesktop(name string) bool {
 	return false
 }
 
+// IsDockerBTRFS checks if Docker is using btrfs storage driver
+func IsDockerBTRFS(name string) bool {
+	if !IsDocker(name) {
+		return false
+	}
+	cmd := exec.Command("docker", "info", "-f", "{{.Driver}}")
+	if err := cmd.Run(); err != nil {
+		klog.Warning("failed to get Docker storage driver: %v", err)
+		return false
+	}
+	output, err := cmd.Output()
+	if err != nil {
+		klog.Warning("failed to get command output: %v", err)
+		return false
+	}
+	return strings.Contains(string(output), "btrfs")
+}
+
 // IsMock checks if the driver is a mock
 func IsMock(name string) bool {
 	return name == Mock