Add container to pod qos cgroup

Signed-off-by: Harry Zhang <harryz@hyper.sh>

server/container_create.go

@@ -251,6 +251,11 @@ func (s *Server) createSandboxContainer(containerID string, containerName string
 			specgen.SetLinuxResourcesOOMScoreAdj(int(oomScoreAdj))
 		}
 
+		if sb.cgroupParent != "" {
+			// NOTE: we only support cgroupfs for now, discussion happens in issue #270.
+			specgen.SetLinuxCgroupsPath(sb.cgroupParent + "/" + containerID)
+		}
+
 		capabilities := linux.GetSecurityContext().GetCapabilities()
 		if capabilities != nil {
 			addCaps := capabilities.GetAddCapabilities()

server/sandbox.go

@@ -9,12 +9,12 @@ import (
 	"sync"
 
 	"github.com/Sirupsen/logrus"
+	"github.com/containernetworking/cni/pkg/ns"
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/kubernetes-incubator/cri-o/oci"
-	"github.com/containernetworking/cni/pkg/ns"
+	"golang.org/x/sys/unix"
 	"k8s.io/kubernetes/pkg/fields"
 	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
-	"golang.org/x/sys/unix"
 )
 
 type sandboxNetNs struct {
@@ -138,6 +138,7 @@ type sandbox struct {
 	netns          *sandboxNetNs
 	metadata       *pb.PodSandboxMetadata
 	shmPath        string
+	cgroupParent   string
 }
 
 const (

server/sandbox_run.go

@@ -245,7 +245,9 @@ func (s *Server) RunPodSandbox(ctx context.Context, req *pb.RunPodSandboxRequest
 	// setup cgroup settings
 	cgroupParent := req.GetConfig().GetLinux().GetCgroupParent()
 	if cgroupParent != "" {
-		g.SetLinuxCgroupsPath(cgroupParent)
+		// NOTE: we only support cgroupfs for now, discussion happens in issue #270.
+		g.SetLinuxCgroupsPath(cgroupParent + "/" + containerID)
+		sb.cgroupParent = cgroupParent
 	}
 
 	// set up namespaces