trial

Signed-off-by: Lokesh Mandvekar <[email protected]>

Author: lsm5

common/pkg/config/config.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	units "github.com/docker/go-units"
+	"github.com/opencontainers/cgroups"
 	selinux "github.com/opencontainers/selinux/go-selinux"
 	"github.com/sirupsen/logrus"
 	"go.podman.io/common/internal/attributedstring"
@@ -745,6 +746,10 @@ func (c *EngineConfig) ImagePlatformToRuntime(os string, arch string) string {
 // cgroup manager. In case the user session isn't available, we're switching the
 // cgroup manager to cgroupfs.  Note, this only applies to rootless.
 func (c *Config) CheckCgroupsAndAdjustConfig() {
+	cgroupsv2 := cgroups.IsCgroup2UnifiedMode()
+	if !cgroupsv2 {
+		logrus.Fatalf("Did not detect Cgroups v2 on your system. Please switch to Cgroups v2.")
+	}
 	if !unshare.IsRootless() || c.Engine.CgroupManager != SystemdCgroupsManager {
 		return
 	}