[software-bridges 5/x] Enable software-bridge implementation

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

@@ -93,6 +93,7 @@ func runServiceCmd(cmd *cobra.Command, args []string) error {
 	setupLog.V(2).Info("sriov-config-service", "config", sriovConf)
 	vars.DevMode = sriovConf.UnsupportedNics
 	vars.ManageSoftwareBridges = sriovConf.ManageSoftwareBridges
+	vars.OVSDBSocketPath = sriovConf.OVSDBSocketPath
 
 	if err := initSupportedNics(); err != nil {
 		return updateSriovResultErr(setupLog, phaseArg, fmt.Errorf("failed to initialize list of supported NIC ids: %v", err))
@@ -181,7 +182,7 @@ func callPlugin(setupLog logr.Logger, phase string, conf *systemd.SriovConfig, h
 		return nil
 	}
 
-	nodeState, err := getNetworkNodeState(setupLog, conf, hostHelpers)
+	nodeState, err := getNetworkNodeState(setupLog, conf, phase, hostHelpers)
 	if err != nil {
 		return err
 	}
@@ -207,7 +208,9 @@ func getPlugin(setupLog logr.Logger, phase string,
 	case consts.Baremetal:
 		switch phase {
 		case PhasePre:
-			configPlugin, err = newGenericPluginFunc(hostHelpers, generic.WithSkipVFConfiguration())
+			configPlugin, err = newGenericPluginFunc(hostHelpers,
+				generic.WithSkipVFConfiguration(),
+				generic.WithSkipBridgeConfiguration())
 		case PhasePost:
 			configPlugin, err = newGenericPluginFunc(hostHelpers)
 		}
@@ -229,10 +232,11 @@ func getPlugin(setupLog logr.Logger, phase string,
 	return configPlugin, nil
 }
 
-func getNetworkNodeState(setupLog logr.Logger, conf *systemd.SriovConfig,
+func getNetworkNodeState(setupLog logr.Logger, conf *systemd.SriovConfig, phase string,
 	hostHelpers helper.HostHelpersInterface) (*sriovv1.SriovNetworkNodeState, error) {
 	var (
 		ifaceStatuses []sriovv1.InterfaceExt
+		bridges       sriovv1.Bridges
 		err           error
 	)
 	switch conf.PlatformType {
@@ -241,6 +245,13 @@ func getNetworkNodeState(setupLog logr.Logger, conf *systemd.SriovConfig,
 		if err != nil {
 			return nil, fmt.Errorf("failed to discover sriov devices on the host:  %v", err)
 		}
+		if phase != PhasePre && vars.ManageSoftwareBridges {
+			// openvswitch is not available during the pre phase
+			bridges, err = hostHelpers.DiscoverBridges()
+			if err != nil {
+				return nil, fmt.Errorf("failed to discover managed bridges on the host:  %v", err)
+			}
+		}
 	case consts.VirtualOpenStack:
 		platformHelper, err := newPlatformHelperFunc()
 		if err != nil {
@@ -257,7 +268,7 @@ func getNetworkNodeState(setupLog logr.Logger, conf *systemd.SriovConfig,
 	}
 	return &sriovv1.SriovNetworkNodeState{
 		Spec:   conf.Spec,
-		Status: sriovv1.SriovNetworkNodeStateStatus{Interfaces: ifaceStatuses},
+		Status: sriovv1.SriovNetworkNodeStateStatus{Interfaces: ifaceStatuses, Bridges: bridges},
 	}, nil
 }
 

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

@@ -38,7 +38,6 @@ func restoreOrigFuncs() {
 
 func getTestSriovInterfaceConfig(platform int) []byte {
 	return []byte(fmt.Sprintf(`spec:
-    dpconfigversion: ""
     interfaces:
         - pciaddress: 0000:d8:00.0
           numvfs: 4
@@ -57,6 +56,7 @@ func getTestSriovInterfaceConfig(platform int) []byte {
           externallymanaged: false
 unsupportedNics: false
 platformType: %d
+manageSoftwareBridges: true
 `, platform))
 }
 
@@ -239,6 +239,7 @@ var _ = Describe("Service", func() {
 		hostHelpers.EXPECT().DiscoverSriovDevices(hostHelpers).Return([]sriovnetworkv1.InterfaceExt{{
 			Name: "enp216s0f0np0",
 		}}, nil)
+		hostHelpers.EXPECT().DiscoverBridges().Return(sriovnetworkv1.Bridges{}, nil)
 		genericPlugin.EXPECT().OnNodeStateChange(newNodeStateContainsDeviceMatcher("enp216s0f0np0")).Return(true, false, nil)
 		genericPlugin.EXPECT().Apply().Return(nil)
 		Expect(runServiceCmd(&cobra.Command{}, []string{})).NotTo(HaveOccurred())

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

@@ -87,6 +87,7 @@ var (
 		disabledPlugins       stringList
 		parallelNicConfig     bool
 		manageSoftwareBridges bool
+		ovsSocketPath         string
 	}
 )
 
@@ -98,6 +99,7 @@ func init() {
 	startCmd.PersistentFlags().VarP(&startOpts.disabledPlugins, "disable-plugins", "", "comma-separated list of plugins to disable")
 	startCmd.PersistentFlags().BoolVar(&startOpts.parallelNicConfig, "parallel-nic-config", false, "perform NIC configuration in parallel")
 	startCmd.PersistentFlags().BoolVar(&startOpts.manageSoftwareBridges, "manage-software-bridges", false, "enable management of software bridges")
+	startCmd.PersistentFlags().StringVar(&startOpts.ovsSocketPath, "ovs-socket-path", vars.OVSDBSocketPath, "path for OVSDB socket")
 }
 
 func runStartCmd(cmd *cobra.Command, args []string) error {
@@ -113,6 +115,7 @@ func runStartCmd(cmd *cobra.Command, args []string) error {
 
 	vars.ParallelNicConfig = startOpts.parallelNicConfig
 	vars.ManageSoftwareBridges = startOpts.manageSoftwareBridges
+	vars.OVSDBSocketPath = startOpts.ovsSocketPath
 
 	if startOpts.nodeName == "" {
 		name, ok := os.LookupEnv("NODE_NAME")

pkg/daemon/writer.go

@@ -117,17 +117,29 @@ func (w *NodeStateStatusWriter) Run(stop <-chan struct{}, refresh <-chan Message
 func (w *NodeStateStatusWriter) pollNicStatus() error {
 	log.Log.V(2).Info("pollNicStatus()")
 	var iface []sriovnetworkv1.InterfaceExt
+	var bridges sriovnetworkv1.Bridges
 	var err error
 
 	if vars.PlatformType == consts.VirtualOpenStack {
 		iface, err = w.platformHelper.DiscoverSriovDevicesVirtual()
+		if err != nil {
+			return err
+		}
 	} else {
 		iface, err = w.hostHelper.DiscoverSriovDevices(w.hostHelper)
+		if err != nil {
+			return err
+		}
+		if vars.ManageSoftwareBridges {
+			bridges, err = w.hostHelper.DiscoverBridges()
+			if err != nil {
+				return err
+			}
+		}
 	}
-	if err != nil {
-		return err
-	}
+
 	w.status.Interfaces = iface
+	w.status.Bridges = bridges
 
 	return nil
 }
@@ -169,6 +181,7 @@ func (w *NodeStateStatusWriter) updateNodeStateStatusRetry(f func(*sriovnetworkv
 func (w *NodeStateStatusWriter) setNodeStateStatus(msg Message) (*sriovnetworkv1.SriovNetworkNodeState, error) {
 	nodeState, err := w.updateNodeStateStatusRetry(func(nodeState *sriovnetworkv1.SriovNetworkNodeState) {
 		nodeState.Status.Interfaces = w.status.Interfaces
+		nodeState.Status.Bridges = w.status.Bridges
 		if msg.lastSyncError != "" || msg.syncStatus == consts.SyncStatusSucceeded {
 			// clear lastSyncError when sync Succeeded
 			nodeState.Status.LastSyncError = msg.lastSyncError

pkg/host/internal/bridge/ovs/ovs.go

@@ -5,8 +5,10 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"os"
 	"reflect"
 	"sort"
+	"strings"
 	"time"
 
 	"github.com/google/uuid"
@@ -17,6 +19,7 @@ import (
 
 	sriovnetworkv1 "github.com/k8snetworkplumbingwg/sriov-network-operator/api/v1"
 	ovsStorePkg "github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/host/internal/bridge/ovs/store"
+	"github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/utils"
 	"github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/vars"
 )
 
@@ -627,6 +630,35 @@ func updateMap(old, new map[string]string) map[string]string {
 	return result
 }
 
+// returns path for the OVDSB socket
+// for unix sockets it is taking into account current FS root and possible symlinks
+func getDBSocketPath() (string, error) {
+	if !strings.HasPrefix(vars.OVSDBSocketPath, "unix://") {
+		// no need to apply modifications to tcp sockets
+		return vars.OVSDBSocketPath, nil
+	}
+	origPathNoPrefix, _ := strings.CutPrefix(vars.OVSDBSocketPath, "unix://")
+	resolvedPath := utils.GetHostExtensionPath(origPathNoPrefix)
+
+	// in some OSes /var/run is an absolute symlink to /run,
+	// this can be a problem when we are trying to access OVSDB socket from the daemon POD.
+	// first we a trying to use original path, if we can't find the OVSDB socket,
+	// we try to replace /var/run with /run in the socket path
+	var err error
+	_, err = os.Stat(resolvedPath)
+	if err != nil && !os.IsNotExist(err) {
+		return "", err
+	}
+	if os.IsNotExist(err) {
+		resolvedPath = strings.Replace(resolvedPath, "/var/run/", "/run/", 1)
+		_, err = os.Stat(resolvedPath)
+		if err != nil {
+			return "", err
+		}
+	}
+	return "unix://" + resolvedPath, nil
+}
+
 // initialize and return OVSDB client
 func getClient(ctx context.Context) (client.Client, error) {
 	openvSwitchEntry := &OpenvSwitchEntry{}
@@ -638,8 +670,13 @@ func getClient(ctx context.Context) (client.Client, error) {
 		return nil, fmt.Errorf("can't create client DB model: %v", err)
 	}
 
+	socketPath, err := getDBSocketPath()
+	if err != nil {
+		return nil, fmt.Errorf("can't find OVSDB socket %s: %v", vars.OVSDBSocketPath, err)
+	}
+
 	dbClient, err := client.NewOVSDBClient(clientDBModel,
-		client.WithEndpoint(vars.OVSDBSocketPath),
+		client.WithEndpoint(socketPath),
 		client.WithLogger(&log.Log))
 	if err != nil {
 		return nil, fmt.Errorf("can't create DB client: %v", err)

pkg/host/internal/bridge/ovs/ovs_test.go

@@ -22,6 +22,8 @@ import (
 	sriovnetworkv1 "github.com/k8snetworkplumbingwg/sriov-network-operator/api/v1"
 	ovsStoreMockPkg "github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/host/internal/bridge/ovs/store/mock"
 	"github.com/k8snetworkplumbingwg/sriov-network-operator/pkg/vars"
+	"github.com/k8snetworkplumbingwg/sriov-network-operator/test/util/fakefilesystem"
+	"github.com/k8snetworkplumbingwg/sriov-network-operator/test/util/helpers"
 )
 
 func getManagedBridges() map[string]*sriovnetworkv1.OVSConfigExt {
@@ -162,6 +164,14 @@ var _ = Describe("OVS", func() {
 	)
 	BeforeEach(func() {
 		ctx = context.Background()
+		origInChroot := vars.InChroot
+		origSocketValue := vars.OVSDBSocketPath
+		origFSRoot := vars.FilesystemRoot
+		DeferCleanup(func() {
+			vars.InChroot = origInChroot
+			vars.OVSDBSocketPath = origSocketValue
+			vars.FilesystemRoot = origFSRoot
+		})
 	})
 	Context("setDefaultTimeout", func() {
 		It("use default", func() {
@@ -179,7 +189,7 @@ var _ = Describe("OVS", func() {
 			timeoutCtx, timeoutFunc := context.WithTimeout(ctx, time.Millisecond*100)
 			defer timeoutFunc()
 			newCtx, _ := setDefaultTimeout(timeoutCtx)
-			time.Sleep(time.Millisecond * 200)
+			time.Sleep(time.Second)
 			Expect(newCtx.Err()).To(MatchError(context.DeadlineExceeded))
 		})
 		It("use explicit timeout - should return noop cancel function", func() {
@@ -212,6 +222,56 @@ var _ = Describe("OVS", func() {
 		})
 	})
 
+	Context("client", func() {
+		It("can't find socket", func() {
+			helpers.GinkgoConfigureFakeFS(&fakefilesystem.FS{})
+			c, err := getClient(ctx)
+			Expect(c).To(BeNil())
+			Expect(err).To(MatchError(ContainSubstring("can't find OVSDB socket")))
+		})
+		Context("getDBSocketPath()", func() {
+			It("tcp socket", func() {
+				vars.OVSDBSocketPath = "tcp://127.0.0.1:4444"
+				sock, err := getDBSocketPath()
+				Expect(err).NotTo(HaveOccurred())
+				Expect(sock).To(Equal("tcp://127.0.0.1:4444"))
+			})
+			It("unix socket - in container", func() {
+				helpers.GinkgoConfigureFakeFS(&fakefilesystem.FS{
+					Dirs:  []string{"/host/ovs"},
+					Files: map[string][]byte{"/host/ovs/ovsdb.sock": {}},
+				})
+				vars.InChroot = false
+				vars.OVSDBSocketPath = "unix:///ovs/ovsdb.sock"
+				sock, err := getDBSocketPath()
+				Expect(err).NotTo(HaveOccurred())
+				Expect(sock).To(Equal("unix://" + vars.FilesystemRoot + "/host/ovs/ovsdb.sock"))
+			})
+			It("unix socket - host", func() {
+				helpers.GinkgoConfigureFakeFS(&fakefilesystem.FS{
+					Dirs:  []string{"/ovs"},
+					Files: map[string][]byte{"/ovs/ovsdb.sock": {}},
+				})
+				vars.InChroot = true
+				vars.OVSDBSocketPath = "unix:///ovs/ovsdb.sock"
+				sock, err := getDBSocketPath()
+				Expect(err).NotTo(HaveOccurred())
+				Expect(sock).To(Equal("unix://" + vars.FilesystemRoot + "/ovs/ovsdb.sock"))
+			})
+			It("unix socket - alternative /var/run path", func() {
+				helpers.GinkgoConfigureFakeFS(&fakefilesystem.FS{
+					Dirs:  []string{"/host/run/ovs"},
+					Files: map[string][]byte{"/host/run/ovs/ovsdb.sock": {}},
+				})
+				vars.InChroot = false
+				vars.OVSDBSocketPath = "unix:///var/run/ovs/ovsdb.sock"
+				sock, err := getDBSocketPath()
+				Expect(err).NotTo(HaveOccurred())
+				Expect(sock).To(Equal("unix://" + vars.FilesystemRoot + "/host/run/ovs/ovsdb.sock"))
+			})
+		})
+	})
+
 	Context("manage bridges", func() {
 		var (
 			store            *ovsStoreMockPkg.MockStore
@@ -224,20 +284,15 @@ var _ = Describe("OVS", func() {
 			ovs              Interface
 		)
 		BeforeEach(func() {
+			vars.InChroot = true
 			tempDir, err = os.MkdirTemp("", "sriov-operator-ovs-test-dir*")
 			testServerSocket = filepath.Join(tempDir, "ovsdb.sock")
 			Expect(err).NotTo(HaveOccurred())
 			testCtrl = gomock.NewController(GinkgoT())
 			store = ovsStoreMockPkg.NewMockStore(testCtrl)
 			_ = store
 			stopServerFunc = startServer("unix", testServerSocket)
-
-			origSocketValue := vars.OVSDBSocketPath
 			vars.OVSDBSocketPath = "unix://" + testServerSocket
-			DeferCleanup(func() {
-				vars.OVSDBSocketPath = origSocketValue
-			})
-
 			ovsClient, err = getClient(ctx)
 			Expect(err).NotTo(HaveOccurred())
 			ovs = New(store)