Implement RDMA subsystem mode change

Now it's possible to configure RDMA subsystem mode using
SR-IOV Network Operator in systemd mode

We can't configure RDMA subsystem in a daemon mode because
it should be done on host before any network namespace is
created.

Author: e0ne

api/v1/sriovnetworkpoolconfig_types.go

@@ -21,6 +21,10 @@ type SriovNetworkPoolConfigSpec struct {
 	// Drain will respect Pod Disruption Budgets (PDBs) such as etcd quorum guards,
 	// even if maxUnavailable is greater than one.
 	MaxUnavailable *intstr.IntOrString `json:"maxUnavailable,omitempty"`
+
+	// +kubebuilder:validation:Enum=shared;exclusive
+	// RDMA subsystem. Allowed value "shared", "exclusive".
+	RdmaMode string `json:"rdmaMode,omitempty"`
 }
 
 type OvsHardwareOffloadConfig struct {

cmd/sriov-network-config-daemon/service.go

@@ -152,6 +152,17 @@ func phasePre(setupLog logr.Logger, conf *systemd.SriovConfig, hostHelpers helpe
 	hostHelpers.TryEnableTun()
 	hostHelpers.TryEnableVhostNet()
 
+	rdmaSubsystem, err := hostHelpers.GetRDMASubsystem()
+	if err != nil {
+		setupLog.Error(err, "failed to get RDMA subsystem mode")
+	}
+	if rdmaSubsystem != conf.RdmaMode {
+		err = hostHelpers.SetRDMASubsystem(conf.RdmaMode)
+		if err != nil {
+			setupLog.Error(err, "failed to set RDMA subsystem mode")
+		}
+	}
+
 	return callPlugin(setupLog, PhasePre, conf, hostHelpers)
 }
 

cmd/sriov-network-config-daemon/service_test.go

@@ -161,6 +161,7 @@ var _ = Describe("Service", func() {
 		hostHelpers.EXPECT().TryEnableRdma().Return(true, nil)
 		hostHelpers.EXPECT().TryEnableTun().Return()
 		hostHelpers.EXPECT().TryEnableVhostNet().Return()
+		hostHelpers.EXPECT().GetRDMASubsystem().Return("", nil)
 		hostHelpers.EXPECT().DiscoverSriovDevices(hostHelpers).Return([]sriovnetworkv1.InterfaceExt{{
 			Name: "enp216s0f0np0",
 		}}, nil)
@@ -186,6 +187,7 @@ var _ = Describe("Service", func() {
 		hostHelpers.EXPECT().TryEnableRdma().Return(true, nil)
 		hostHelpers.EXPECT().TryEnableTun().Return()
 		hostHelpers.EXPECT().TryEnableVhostNet().Return()
+		hostHelpers.EXPECT().GetRDMASubsystem().Return("", nil)
 
 		platformHelper.EXPECT().CreateOpenstackDevicesInfo().Return(nil)
 		platformHelper.EXPECT().DiscoverSriovDevicesVirtual().Return([]sriovnetworkv1.InterfaceExt{{
@@ -214,6 +216,7 @@ var _ = Describe("Service", func() {
 		hostHelpers.EXPECT().TryEnableRdma().Return(true, nil)
 		hostHelpers.EXPECT().TryEnableTun().Return()
 		hostHelpers.EXPECT().TryEnableVhostNet().Return()
+		hostHelpers.EXPECT().GetRDMASubsystem().Return("", nil)
 		hostHelpers.EXPECT().DiscoverSriovDevices(hostHelpers).Return([]sriovnetworkv1.InterfaceExt{{
 			Name: "enp216s0f0np0",
 		}}, nil)

config/crd/bases/sriovnetwork.openshift.io_sriovnetworkpoolconfigs.yaml

@@ -103,6 +103,12 @@ spec:
                       offload'
                     type: string
                 type: object
+              rdmaMode:
+                description: RDMA subsystem. Allowed value "shared", "exclusive".
+                enum:
+                - shared
+                - exclusive
+                type: string
             type: object
           status:
             description: SriovNetworkPoolConfigStatus defines the observed state of

controllers/drain_controller.go

@@ -24,11 +24,8 @@ import (
 
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
-	"k8s.io/apimachinery/pkg/util/intstr"
 	"k8s.io/client-go/tools/record"
 	"k8s.io/client-go/util/workqueue"
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -48,13 +45,6 @@ import (
 	"github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/vars"
 )
 
-var (
-	oneNode     = intstr.FromInt32(1)
-	defaultNpcl = &sriovnetworkv1.SriovNetworkPoolConfig{Spec: sriovnetworkv1.SriovNetworkPoolConfigSpec{
-		MaxUnavailable: &oneNode,
-		NodeSelector:   &metav1.LabelSelector{}}}
-)
-
 type DrainReconcile struct {
 	client.Client
 	Scheme   *runtime.Scheme
@@ -345,94 +335,7 @@ func (dr *DrainReconcile) tryDrainNode(ctx context.Context, node *corev1.Node) (
 }
 
 func (dr *DrainReconcile) findNodePoolConfig(ctx context.Context, node *corev1.Node) (*sriovnetworkv1.SriovNetworkPoolConfig, []corev1.Node, error) {
-	logger := log.FromContext(ctx)
-	logger.Info("findNodePoolConfig():")
-	// get all the sriov network pool configs
-	npcl := &sriovnetworkv1.SriovNetworkPoolConfigList{}
-	err := dr.List(ctx, npcl)
-	if err != nil {
-		logger.Error(err, "failed to list sriovNetworkPoolConfig")
-		return nil, nil, err
-	}
-
-	selectedNpcl := []*sriovnetworkv1.SriovNetworkPoolConfig{}
-	nodesInPools := map[string]interface{}{}
-
-	for _, npc := range npcl.Items {
-		// we skip hw offload objects
-		if npc.Spec.OvsHardwareOffloadConfig.Name != "" {
-			continue
-		}
-
-		if npc.Spec.NodeSelector == nil {
-			npc.Spec.NodeSelector = &metav1.LabelSelector{}
-		}
-
-		selector, err := metav1.LabelSelectorAsSelector(npc.Spec.NodeSelector)
-		if err != nil {
-			logger.Error(err, "failed to create label selector from nodeSelector", "nodeSelector", npc.Spec.NodeSelector)
-			return nil, nil, err
-		}
-
-		if selector.Matches(labels.Set(node.Labels)) {
-			selectedNpcl = append(selectedNpcl, npc.DeepCopy())
-		}
-
-		nodeList := &corev1.NodeList{}
-		err = dr.List(ctx, nodeList, &client.ListOptions{LabelSelector: selector})
-		if err != nil {
-			logger.Error(err, "failed to list all the nodes matching the pool with label selector from nodeSelector",
-				"machineConfigPoolName", npc,
-				"nodeSelector", npc.Spec.NodeSelector)
-			return nil, nil, err
-		}
-
-		for _, nodeName := range nodeList.Items {
-			nodesInPools[nodeName.Name] = nil
-		}
-	}
-
-	if len(selectedNpcl) > 1 {
-		// don't allow the node to be part of multiple pools
-		err = fmt.Errorf("node is part of more then one pool")
-		logger.Error(err, "multiple pools founded for a specific node", "numberOfPools", len(selectedNpcl), "pools", selectedNpcl)
-		return nil, nil, err
-	} else if len(selectedNpcl) == 1 {
-		// found one pool for our node
-		logger.V(2).Info("found sriovNetworkPool", "pool", *selectedNpcl[0])
-		selector, err := metav1.LabelSelectorAsSelector(selectedNpcl[0].Spec.NodeSelector)
-		if err != nil {
-			logger.Error(err, "failed to create label selector from nodeSelector", "nodeSelector", selectedNpcl[0].Spec.NodeSelector)
-			return nil, nil, err
-		}
-
-		// list all the nodes that are also part of this pool and return them
-		nodeList := &corev1.NodeList{}
-		err = dr.List(ctx, nodeList, &client.ListOptions{LabelSelector: selector})
-		if err != nil {
-			logger.Error(err, "failed to list nodes using with label selector", "labelSelector", selector)
-			return nil, nil, err
-		}
-
-		return selectedNpcl[0], nodeList.Items, nil
-	} else {
-		// in this case we get all the nodes and remove the ones that already part of any pool
-		logger.V(1).Info("node doesn't belong to any pool, using default drain configuration with MaxUnavailable of one", "pool", *defaultNpcl)
-		nodeList := &corev1.NodeList{}
-		err = dr.List(ctx, nodeList)
-		if err != nil {
-			logger.Error(err, "failed to list all the nodes")
-			return nil, nil, err
-		}
-
-		defaultNodeLists := []corev1.Node{}
-		for _, nodeObj := range nodeList.Items {
-			if _, exist := nodesInPools[nodeObj.Name]; !exist {
-				defaultNodeLists = append(defaultNodeLists, nodeObj)
-			}
-		}
-		return defaultNpcl, defaultNodeLists, nil
-	}
+	return utils.FindNodePoolConfig(ctx, node, dr.Client)
 }
 
 // SetupWithManager sets up the controller with the Manager.

deployment/sriov-network-operator/crds/sriovnetwork.openshift.io_sriovnetworkpoolconfigs.yaml

@@ -103,6 +103,12 @@ spec:
                       offload'
                     type: string
                 type: object
+              rdmaMode:
+                description: RDMA subsystem. Allowed value "shared", "exclusive".
+                enum:
+                - shared
+                - exclusive
+                type: string
             type: object
           status:
             description: SriovNetworkPoolConfigStatus defines the observed state of

pkg/consts/constants.go

@@ -47,6 +47,9 @@ const (
 	VdpaTypeVirtio      = "virtio"
 	VdpaTypeVhost       = "vhost"
 
+	RdmaSubsystemModeShared    = "shared"
+	RdmaSubsystemModeExclusive = "exclusive"
+
 	ClusterTypeOpenshift  = "openshift"
 	ClusterTypeKubernetes = "kubernetes"
 

pkg/daemon/daemon.go

@@ -13,6 +13,8 @@ import (
 	"sync"
 	"time"
 
+	corev1 "k8s.io/api/core/v1"
+
 	"golang.org/x/time/rate"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -453,7 +455,19 @@ func (dn *Daemon) nodeStateSyncHandler() error {
 	// When using systemd configuration we write the file
 	if vars.UsingSystemdMode {
 		log.Log.V(0).Info("nodeStateSyncHandler(): writing systemd config file to host")
-		systemdConfModified, err := systemd.WriteConfFile(dn.desiredNodeState)
+		// get node object
+		node := &corev1.Node{}
+		err := dn.client.Get(context.TODO(), client.ObjectKey{Name: vars.NodeName}, node)
+		if err != nil {
+			log.Log.Error(err, "nodeStateSyncHandler(): failed to get node object")
+			return err
+		}
+		netPoolConfig, _, err := utils.FindNodePoolConfig(context.Background(), node, dn.client)
+		if err != nil {
+			log.Log.Error(err, "nodeStateSyncHandler(): failed to get SriovNetworkPoolConfig for the current node")
+		}
+
+		systemdConfModified, err := systemd.WriteConfFile(dn.desiredNodeState, netPoolConfig)
 		if err != nil {
 			log.Log.Error(err, "nodeStateSyncHandler(): failed to write configuration file for systemd mode")
 			return err

pkg/helper/mock/mock_helper.go

@@ -522,6 +522,34 @@ func (k *kernel) InstallRDMA(packageManager string) error {
 	return nil
 }
 
+func (k *kernel) GetRDMASubsystem() (string, error) {
+	log.Log.Info("GetRDMASubsystem(): retrieving RDMA subsystem mode")
+	chrootDefinition := utils.GetChrootExtension()
+
+	stdout, stderr, err := k.utilsHelper.RunCommand("/bin/sh", "-c", fmt.Sprintf("%s /usr/bin/rdma system show", chrootDefinition))
+	if err != nil && len(stderr) != 0 {
+		log.Log.Error(err, "GetRDMASubsystem(): failed to get RDMA subsystem mode", "stdout", stdout, "stderr", stderr)
+		return "", err
+	}
+
+	// Example of an =output: netns shared copy-on-fork on
+	subsystem := strings.Fields(stdout)[1]
+	return subsystem, nil
+}
+
+func (k *kernel) SetRDMASubsystem(mode string) error {
+	log.Log.Info("SetRDMASubsystem(): Updating RDMA subsystem mode")
+	chrootDefinition := utils.GetChrootExtension()
+
+	stdout, stderr, err := k.utilsHelper.RunCommand("/bin/sh", "-c", fmt.Sprintf("%s /usr/bin/rdma system set net %s", chrootDefinition, mode))
+	if err != nil && len(stderr) != 0 {
+		log.Log.Error(err, "SetRDMASubsystem(): failed to update RDMA subsystem mode", "stdout", stdout, "stderr", stderr)
+		return err
+	}
+
+	return nil
+}
+
 func (k *kernel) TriggerUdevEvent() error {
 	log.Log.Info("TriggerUdevEvent(): installing RDMA")