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ovs_linux.go
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ovs_linux.go
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package daemon
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"strings"
"time"
"github.com/Mellanox/sriovnet"
sriovutilfs "github.com/Mellanox/sriovnet/pkg/utils/filesystem"
"github.com/containernetworking/plugins/pkg/ns"
"github.com/containernetworking/plugins/pkg/utils/sysctl"
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog/v2"
kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
"github.com/kubeovn/kube-ovn/pkg/ovs"
"github.com/kubeovn/kube-ovn/pkg/request"
"github.com/kubeovn/kube-ovn/pkg/util"
)
var pciAddrRegexp = regexp.MustCompile(`\b([0-9a-fA-F]{4}:[0-9a-fA-F]{2}:[0-9a-fA-F]{2}.\d{1}\S*)`)
func (csh cniServerHandler) configureDpdkNic(podName, podNamespace, provider, netns, containerID, ifName, mac string, mtu int, ip, gateway, ingress, egress, shortSharedDir, socketName string) error {
sharedDir := filepath.Join("/var", shortSharedDir)
hostNicName, _ := generateNicName(containerID, ifName)
ipStr := util.GetIpWithoutMask(ip)
ifaceID := ovs.PodNameToPortName(podName, podNamespace, provider)
ovs.CleanDuplicatePort(ifaceID, hostNicName)
// Add veth pair host end to ovs port
output, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", hostNicName, "--",
"set", "interface", hostNicName,
"type=dpdkvhostuserclient",
fmt.Sprintf("options:vhost-server-path=%s", path.Join(sharedDir, socketName)),
fmt.Sprintf("external_ids:iface-id=%s", ifaceID),
fmt.Sprintf("external_ids:pod_name=%s", podName),
fmt.Sprintf("external_ids:pod_namespace=%s", podNamespace),
fmt.Sprintf("external_ids:ip=%s", ipStr),
fmt.Sprintf("external_ids:pod_netns=%s", netns))
if err != nil {
return fmt.Errorf("add nic to ovs failed %v: %q", err, output)
}
if err = ovs.SetInterfaceBandwidth(podName, podNamespace, ifaceID, egress, ingress); err != nil {
return err
}
return nil
}
func (csh cniServerHandler) configureNic(podName, podNamespace, provider, netns, containerID, vfDriver, ifName, mac string, mtu int, ip, gateway string, isDefaultRoute, detectIPConflict bool, routes []request.Route, dnsServer, dnsSuffix []string, ingress, egress, DeviceID, nicType, latency, limit, loss, jitter string, gwCheckMode int, u2oInterconnectionIP string) error {
var err error
var hostNicName, containerNicName string
if DeviceID == "" {
hostNicName, containerNicName, err = setupVethPair(containerID, ifName, mtu)
if err != nil {
klog.Errorf("failed to create veth pair %v", err)
return err
}
} else {
hostNicName, containerNicName, err = setupSriovInterface(containerID, DeviceID, vfDriver, ifName, mtu, mac)
if err != nil {
klog.Errorf("failed to create sriov interfaces %v", err)
return err
}
}
ipStr := util.GetIpWithoutMask(ip)
ifaceID := ovs.PodNameToPortName(podName, podNamespace, provider)
ovs.CleanDuplicatePort(ifaceID, hostNicName)
// Add veth pair host end to ovs port
output, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", hostNicName, "--",
"set", "interface", hostNicName, fmt.Sprintf("external_ids:iface-id=%s", ifaceID),
fmt.Sprintf("external_ids:pod_name=%s", podName),
fmt.Sprintf("external_ids:pod_namespace=%s", podNamespace),
fmt.Sprintf("external_ids:ip=%s", ipStr),
fmt.Sprintf("external_ids:pod_netns=%s", netns))
if err != nil {
return fmt.Errorf("add nic to ovs failed %v: %q", err, output)
}
// lsp and container nic must use same mac address, otherwise ovn will reject these packets by default
macAddr, err := net.ParseMAC(mac)
if err != nil {
return fmt.Errorf("failed to parse mac %s %v", macAddr, err)
}
if err = configureHostNic(hostNicName); err != nil {
return err
}
if err = ovs.SetInterfaceBandwidth(podName, podNamespace, ifaceID, egress, ingress); err != nil {
return err
}
if err = ovs.SetNetemQos(podName, podNamespace, ifaceID, latency, limit, loss, jitter); err != nil {
return err
}
if containerNicName == "" {
return nil
}
isUserspaceDP, err := ovs.IsUserspaceDataPath()
if err != nil {
return err
}
if isUserspaceDP {
// turn off tx checksum
if err = turnOffNicTxChecksum(containerNicName); err != nil {
return err
}
}
podNS, err := ns.GetNS(netns)
if err != nil {
return fmt.Errorf("failed to open netns %q: %v", netns, err)
}
if err = configureContainerNic(containerNicName, ifName, ip, gateway, isDefaultRoute, detectIPConflict, routes, macAddr, podNS, mtu, nicType, gwCheckMode, u2oInterconnectionIP); err != nil {
return err
}
return nil
}
func (csh cniServerHandler) deleteNic(podName, podNamespace, containerID, netns, deviceID, ifName, nicType string) error {
var nicName string
hostNicName, containerNicName := generateNicName(containerID, ifName)
if nicType == util.InternalType {
nicName = containerNicName
} else {
nicName = hostNicName
}
// Remove ovs port
output, err := ovs.Exec(ovs.IfExists, "--with-iface", "del-port", "br-int", nicName)
if err != nil {
return fmt.Errorf("failed to delete ovs port %v, %q", err, output)
}
if err = ovs.ClearPodBandwidth(podName, podNamespace, ""); err != nil {
return err
}
if err = ovs.ClearHtbQosQueue(podName, podNamespace, ""); err != nil {
return err
}
if deviceID == "" {
hostLink, err := netlink.LinkByName(nicName)
if err != nil {
// If link already not exists, return quietly
// E.g. Internal port had been deleted by Remove ovs port previously
if _, ok := err.(netlink.LinkNotFoundError); ok {
return nil
}
return fmt.Errorf("find host link %s failed %v", nicName, err)
}
hostLinkType := hostLink.Type()
// Sometimes no deviceID input for vf nic, avoid delete vf nic.
if hostLinkType == "veth" {
if err = netlink.LinkDel(hostLink); err != nil {
return fmt.Errorf("delete host link %s failed %v", hostLink, err)
}
}
} else if pciAddrRegexp.MatchString(deviceID) {
// Ret VF index from PCI
vfIndex, err := sriovnet.GetVfIndexByPciAddress(deviceID)
if err != nil {
klog.Errorf("failed to get vf %s index, %v", deviceID, err)
return err
}
if err = setVfMac(deviceID, vfIndex, "00:00:00:00:00:00"); err != nil {
return err
}
}
return nil
}
func generateNicName(containerID, ifname string) (string, string) {
if ifname == "eth0" {
return fmt.Sprintf("%s_h", containerID[0:12]), fmt.Sprintf("%s_c", containerID[0:12])
}
return fmt.Sprintf("%s_%s_h", containerID[0:12-len(ifname)], ifname), fmt.Sprintf("%s_%s_c", containerID[0:12-len(ifname)], ifname)
}
func configureHostNic(nicName string) error {
hostLink, err := netlink.LinkByName(nicName)
if err != nil {
return fmt.Errorf("can not find host nic %s: %v", nicName, err)
}
if hostLink.Attrs().OperState != netlink.OperUp {
if err = netlink.LinkSetUp(hostLink); err != nil {
return fmt.Errorf("can not set host nic %s up: %v", nicName, err)
}
}
if err = netlink.LinkSetTxQLen(hostLink, 1000); err != nil {
return fmt.Errorf("can not set host nic %s qlen: %v", nicName, err)
}
return nil
}
func configureContainerNic(nicName, ifName string, ipAddr, gateway string, isDefaultRoute, detectIPConflict bool, routes []request.Route, macAddr net.HardwareAddr, netns ns.NetNS, mtu int, nicType string, gwCheckMode int, u2oInterconnectionIP string) error {
containerLink, err := netlink.LinkByName(nicName)
if err != nil {
return fmt.Errorf("can not find container nic %s: %v", nicName, err)
}
// Set link alias to its origin link name for fastpath to recognize and bypass netfilter
if err := netlink.LinkSetAlias(containerLink, nicName); err != nil {
klog.Errorf("failed to set link alias for container nic %s: %v", nicName, err)
return err
}
if err = netlink.LinkSetNsFd(containerLink, int(netns.Fd())); err != nil {
return fmt.Errorf("failed to move link to netns: %v", err)
}
return ns.WithNetNSPath(netns.Path(), func(_ ns.NetNS) error {
if nicType != util.InternalType {
if err = netlink.LinkSetName(containerLink, ifName); err != nil {
return err
}
}
if util.CheckProtocol(ipAddr) == kubeovnv1.ProtocolDual || util.CheckProtocol(ipAddr) == kubeovnv1.ProtocolIPv6 {
// For docker version >=17.x the "none" network will disable ipv6 by default.
// We have to enable ipv6 here to add v6 address and gateway.
// See https://github.com/containernetworking/cni/issues/531
value, err := sysctl.Sysctl("net.ipv6.conf.all.disable_ipv6")
if err != nil {
return fmt.Errorf("failed to get sysctl net.ipv6.conf.all.disable_ipv6: %v", err)
}
if value != "0" {
if _, err = sysctl.Sysctl("net.ipv6.conf.all.disable_ipv6", "0"); err != nil {
return fmt.Errorf("failed to enable ipv6 on all nic: %v", err)
}
}
}
if nicType == util.InternalType {
if err = addAdditionalNic(ifName); err != nil {
return err
}
if err = configureAdditionalNic(ifName, ipAddr); err != nil {
return err
}
if err = configureNic(nicName, ipAddr, macAddr, mtu, detectIPConflict); err != nil {
return err
}
} else {
if err = configureNic(ifName, ipAddr, macAddr, mtu, detectIPConflict); err != nil {
return err
}
}
if isDefaultRoute {
// Only eth0 requires the default route and gateway
containerGw := gateway
if u2oInterconnectionIP != "" {
containerGw = u2oInterconnectionIP
}
for _, gw := range strings.Split(containerGw, ",") {
if err = netlink.RouteReplace(&netlink.Route{
LinkIndex: containerLink.Attrs().Index,
Scope: netlink.SCOPE_UNIVERSE,
Gw: net.ParseIP(gw),
}); err != nil {
return fmt.Errorf("failed to configure default gateway %s: %v", gw, err)
}
}
}
for _, r := range routes {
var dst *net.IPNet
if r.Destination != "" {
if _, dst, err = net.ParseCIDR(r.Destination); err != nil {
klog.Errorf("invalid route destination %s: %v", r.Destination, err)
continue
}
}
var gw net.IP
if r.Gateway != "" {
if gw = net.ParseIP(r.Gateway); gw == nil {
klog.Errorf("invalid route gateway %s", r.Gateway)
continue
}
}
route := &netlink.Route{
Dst: dst,
Gw: gw,
LinkIndex: containerLink.Attrs().Index,
}
if err = netlink.RouteReplace(route); err != nil {
klog.Errorf("failed to add route %+v: %v", r, err)
}
}
if gwCheckMode != gatewayModeDisabled {
var (
underlayGateway = gwCheckMode == gatewayCheckModeArping || gwCheckMode == gatewayCheckModeArpingNotConcerned
interfaceName = nicName
)
if nicType != util.InternalType {
interfaceName = ifName
}
if u2oInterconnectionIP != "" {
if err := checkGatewayReady(gwCheckMode, interfaceName, ipAddr, u2oInterconnectionIP, false, true); err != nil {
return err
}
}
return checkGatewayReady(gwCheckMode, interfaceName, ipAddr, gateway, underlayGateway, true)
}
return nil
})
}
func checkGatewayReady(gwCheckMode int, intr, ipAddr, gateway string, underlayGateway, verbose bool) error {
var err error
if gwCheckMode == gatewayCheckModeArpingNotConcerned || gwCheckMode == gatewayCheckModePingNotConcerned {
// ignore error if disableGatewayCheck=true
if err = waitNetworkReady(intr, ipAddr, gateway, underlayGateway, verbose, 1); err != nil {
err = nil
}
} else {
err = waitNetworkReady(intr, ipAddr, gateway, underlayGateway, verbose, gatewayCheckMaxRetry)
}
return err
}
func waitNetworkReady(nic, ipAddr, gateway string, underlayGateway, verbose bool, maxRetry int) error {
ips := strings.Split(ipAddr, ",")
for i, gw := range strings.Split(gateway, ",") {
src := strings.Split(ips[i], "/")[0]
if underlayGateway && util.CheckProtocol(gw) == kubeovnv1.ProtocolIPv4 {
mac, count, err := util.ArpResolve(nic, src, gw, time.Second, maxRetry)
cniConnectivityResult.WithLabelValues(nodeName).Add(float64(count))
if err != nil {
err = fmt.Errorf("network %s with gateway %s is not ready for interface %s after %d checks: %v", ips[i], gw, nic, count, err)
klog.Warning(err)
return err
}
if verbose {
klog.Infof("MAC addresses of gateway %s is %s", gw, mac.String())
klog.Infof("network %s with gateway %s is ready for interface %s after %d checks", ips[i], gw, nic, count)
}
} else {
if err := pingGateway(gw, src, verbose, maxRetry); err != nil {
return err
}
}
}
return nil
}
func configureNodeNic(portName, ip, gw string, macAddr net.HardwareAddr, mtu int) error {
ipStr := util.GetIpWithoutMask(ip)
raw, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", util.NodeNic, "--",
"set", "interface", util.NodeNic, "type=internal", "--",
"set", "interface", util.NodeNic, fmt.Sprintf("external_ids:iface-id=%s", portName),
fmt.Sprintf("external_ids:ip=%s", ipStr))
if err != nil {
klog.Errorf("failed to configure node nic %s: %v, %q", portName, err, raw)
return fmt.Errorf(raw)
}
if err = configureNic(util.NodeNic, ip, macAddr, mtu, false); err != nil {
return err
}
hostLink, err := netlink.LinkByName(util.NodeNic)
if err != nil {
return fmt.Errorf("can not find nic %s: %v", util.NodeNic, err)
}
if err = netlink.LinkSetTxQLen(hostLink, 1000); err != nil {
return fmt.Errorf("can not set host nic %s qlen: %v", util.NodeNic, err)
}
// ping ovn0 gw to activate the flow
klog.Infof("wait ovn0 gw ready")
if err := waitNetworkReady(util.NodeNic, ip, gw, false, true, gatewayCheckMaxRetry); err != nil {
klog.Errorf("failed to init ovn0 check: %v", err)
return err
}
return nil
}
// If OVS restart, the ovn0 port will down and prevent host to pod network,
// Restart the kube-ovn-cni when this happens
func (c *Controller) loopOvn0Check() {
link, err := netlink.LinkByName(util.NodeNic)
if err != nil {
util.LogFatalAndExit(err, "failed to get ovn0 nic")
}
if link.Attrs().OperState == netlink.OperDown {
util.LogFatalAndExit(err, "ovn0 nic is down")
}
node, err := c.nodesLister.Get(c.config.NodeName)
if err != nil {
klog.Errorf("failed to get node %s: %v", c.config.NodeName, err)
return
}
ip := node.Annotations[util.IpAddressAnnotation]
gw := node.Annotations[util.GatewayAnnotation]
if err := waitNetworkReady(util.NodeNic, ip, gw, false, false, 5); err != nil {
util.LogFatalAndExit(err, "failed to ping ovn0 gateway %s", gw)
}
}
func (c *Controller) checkNodeGwNicInNs(nodeExtIp, ip, gw string, gwNS ns.NetNS) error {
exists, err := ovs.PortExists(util.NodeGwNic)
if err != nil {
klog.Error(err)
return err
}
filters := labels.Set{util.OvnEipUsageLabel: util.LrpUsingEip, util.OvnLrpEipEnableBfdLabel: "true"}
ovnEips, err := c.ovnEipsLister.List(labels.SelectorFromSet(filters))
if err != nil {
klog.Errorf("failed to list node external ovn eip, %v", err)
return err
}
if len(ovnEips) == 0 {
// no lrp eip, no need to check
return nil
}
if exists {
return ns.WithNetNSPath(gwNS.Path(), func(_ ns.NetNS) error {
err = waitNetworkReady(util.NodeGwNic, ip, gw, true, true, 3)
if err == nil {
cmd := exec.Command("sh", "-c", "bfdd-control status")
if err := cmd.Run(); err != nil {
err := fmt.Errorf("failed to get bfdd status, %v", err)
klog.Error(err)
return err
}
for _, eip := range ovnEips {
if eip.Status.Ready {
cmd := exec.Command("sh", "-c", fmt.Sprintf("bfdd-control status remote %s local %s", eip.Spec.V4Ip, nodeExtIp))
var outb bytes.Buffer
cmd.Stdout = &outb
if err := cmd.Run(); err == nil {
out := string(outb.String())
klog.V(3).Info(out)
if strings.Contains(out, "No session") {
// not exist
cmd = exec.Command("sh", "-c", fmt.Sprintf("bfdd-control allow %s", eip.Spec.V4Ip))
if err := cmd.Run(); err != nil {
err := fmt.Errorf("failed to add lrp %s ip %s into bfd listening list, %v", eip.Name, eip.Status.V4Ip, err)
klog.Error(err)
return err
}
}
} else {
err := fmt.Errorf("faild to check bfd status remote %s local %s", eip.Spec.V4Ip, nodeExtIp)
klog.Error(err)
return err
}
}
}
}
return err
})
} else {
err := fmt.Errorf("node external gw not ready")
klog.Error(err)
return err
}
}
func configureNodeGwNic(portName, ip, gw string, macAddr net.HardwareAddr, mtu int, gwNS ns.NetNS) error {
ipStr := util.GetIpWithoutMask(ip)
output, err := ovs.Exec(ovs.MayExist, "add-port", "br-int", util.NodeGwNic, "--",
"set", "interface", util.NodeGwNic, "type=internal", "--",
"set", "interface", util.NodeGwNic, fmt.Sprintf("external_ids:iface-id=%s", portName),
fmt.Sprintf("external_ids:ip=%s", ipStr),
fmt.Sprintf("external_ids:pod_netns=%s", util.NodeGwNsPath))
if err != nil {
klog.Errorf("failed to configure node external nic %s: %v, %q", portName, err, output)
return fmt.Errorf(output)
}
gwLink, err := netlink.LinkByName(util.NodeGwNic)
if err == nil {
if err = netlink.LinkSetNsFd(gwLink, int(gwNS.Fd())); err != nil {
klog.Errorf("failed to move link into netns: %v", err)
return err
}
} else {
klog.V(3).Infof("node external nic %q already in ns %s", util.NodeGwNic, util.NodeGwNsPath)
}
return ns.WithNetNSPath(gwNS.Path(), func(_ ns.NetNS) error {
if util.CheckProtocol(ip) == kubeovnv1.ProtocolDual || util.CheckProtocol(ip) == kubeovnv1.ProtocolIPv6 {
// For docker version >=17.x the "none" network will disable ipv6 by default.
// We have to enable ipv6 here to add v6 address and gateway.
// See https://github.com/containernetworking/cni/issues/531
value, err := sysctl.Sysctl("net.ipv6.conf.all.disable_ipv6")
if err != nil {
return fmt.Errorf("failed to get sysctl net.ipv6.conf.all.disable_ipv6: %v", err)
}
if value != "0" {
if _, err = sysctl.Sysctl("net.ipv6.conf.all.disable_ipv6", "0"); err != nil {
return fmt.Errorf("failed to enable ipv6 on all nic: %v", err)
}
}
}
if err = configureNic(util.NodeGwNic, ip, macAddr, mtu, true); err != nil {
klog.Errorf("failed to congigure node gw nic %s, %v", util.NodeGwNic, err)
return err
}
if err = configureLoNic(); err != nil {
klog.Errorf("failed to configure nic %s, %v", util.LoNic, err)
return err
}
gwLink, err = netlink.LinkByName(util.NodeGwNic)
if err != nil {
klog.Errorf("failed to get link %q, %v", util.NodeGwNic, err)
return err
}
switch util.CheckProtocol(ip) {
case kubeovnv1.ProtocolIPv4:
_, defaultNet, _ := net.ParseCIDR("0.0.0.0/0")
err = netlink.RouteReplace(&netlink.Route{
LinkIndex: gwLink.Attrs().Index,
Scope: netlink.SCOPE_UNIVERSE,
Dst: defaultNet,
Gw: net.ParseIP(gw),
})
case kubeovnv1.ProtocolIPv6:
_, defaultNet, _ := net.ParseCIDR("::/0")
err = netlink.RouteReplace(&netlink.Route{
LinkIndex: gwLink.Attrs().Index,
Scope: netlink.SCOPE_UNIVERSE,
Dst: defaultNet,
Gw: net.ParseIP(gw),
})
case kubeovnv1.ProtocolDual:
gws := strings.Split(gw, ",")
_, defaultNet, _ := net.ParseCIDR("0.0.0.0/0")
err = netlink.RouteReplace(&netlink.Route{
LinkIndex: gwLink.Attrs().Index,
Scope: netlink.SCOPE_UNIVERSE,
Dst: defaultNet,
Gw: net.ParseIP(gws[0]),
})
if err != nil {
return fmt.Errorf("config v4 gateway failed: %v", err)
}
_, defaultNet, _ = net.ParseCIDR("::/0")
err = netlink.RouteReplace(&netlink.Route{
LinkIndex: gwLink.Attrs().Index,
Scope: netlink.SCOPE_UNIVERSE,
Dst: defaultNet,
Gw: net.ParseIP(gws[1]),
})
}
if err != nil {
return fmt.Errorf("failed to configure gateway: %v", err)
}
cmd := exec.Command("sh", "-c", "/usr/local/bin/bfdd-beacon --listen=0.0.0.0")
if err := cmd.Run(); err != nil {
err := fmt.Errorf("failed to get start bfd listen, %v", err)
klog.Error(err)
return err
}
return waitNetworkReady(util.NodeGwNic, ip, gw, true, true, 3)
})
}
func removeNodeGwNic() error {
if _, err := ovs.Exec(ovs.IfExists, "del-port", "br-int", util.NodeGwNic); err != nil {
return fmt.Errorf("failed to remove ecmp external port %s from OVS bridge %s: %v", "br-int", util.NodeGwNic, err)
}
klog.Infof("removed node external gw nic %q", util.NodeGwNic)
return nil
}
func removeNodeGwNs() error {
if err := DeleteNamedNs(util.NodeGwNs); err != nil {
return fmt.Errorf("failed to remove node external gw ns %s: %v", util.NodeGwNs, err)
}
klog.Infof("node external gw ns %s removed", util.NodeGwNs)
return nil
}
// If OVS restart, the ovnext0 port will down and prevent host to pod network,
// Restart the kube-ovn-cni when this happens
func (c *Controller) loopOvnExt0Check() {
node, err := c.nodesLister.Get(c.config.NodeName)
if err != nil {
klog.Errorf("failed to get node %s: %v", c.config.NodeName, err)
return
}
portName := node.Name
cachedEip, err := c.ovnEipsLister.Get(portName)
needClean := false
if err != nil {
if k8serrors.IsNotFound(err) {
if val, ok := node.Labels[util.NodeExtGwLabel]; !ok || (val == "false") {
// not gw node or already clean
return
}
needClean = true
} else {
klog.Errorf("failed to get ecmp gateway ovn eip, %v", err)
return
}
}
if needClean {
if err := removeNodeGwNic(); err != nil {
klog.Error(err)
return
}
if err := removeNodeGwNs(); err != nil {
klog.Error(err)
return
}
if err = c.patchNodeExternalGwLabel(node.Name, false); err != nil {
klog.Errorf("failed to patch label on node %s, %v", node, err)
return
}
return
}
if cachedEip.Status.V4Ip == "" {
klog.Errorf("ecmp gateway ovn eip still has no ip")
return
}
ips := util.GetStringIP(cachedEip.Status.V4Ip, cachedEip.Status.V6Ip)
cachedSubnet, err := c.subnetsLister.Get(cachedEip.Spec.ExternalSubnet)
if err != nil {
klog.Errorf("failed to get external subnet %s, %v", cachedEip.Spec.ExternalSubnet, err)
return
}
gw := cachedSubnet.Spec.Gateway
mac, err := net.ParseMAC(cachedEip.Status.MacAddress)
if err != nil {
klog.Errorf("failed to parse mac %s, %v", cachedEip.Status.MacAddress, err)
return
}
gwNS, err := ns.GetNS(util.NodeGwNsPath)
if err != nil {
// ns not exist, create node external gw ns
cmd := exec.Command("sh", "-c", fmt.Sprintf("/usr/sbin/ip netns add %s", util.NodeGwNs))
if err := cmd.Run(); err != nil {
err := fmt.Errorf("failed to get create gw ns %s, %v", util.NodeGwNs, err)
klog.Error(err)
return
}
if gwNS, err = ns.GetNS(util.NodeGwNsPath); err != nil {
err := fmt.Errorf("failed to get node gw ns %s, %v", util.NodeGwNs, err)
klog.Error(err)
return
}
}
nodeExtIp := cachedEip.Spec.V4Ip
ipAddr := util.GetIpAddrWithMask(ips, cachedSubnet.Spec.CIDRBlock)
if err := c.checkNodeGwNicInNs(nodeExtIp, ipAddr, gw, gwNS); err == nil {
// add all lrp ip in bfd listening list
return
}
klog.Infof("setup nic ovnext0 ip %s, mac %v, mtu %d", ipAddr, mac, c.config.MTU)
if err := configureNodeGwNic(portName, ipAddr, gw, mac, c.config.MTU, gwNS); err != nil {
klog.Errorf("failed to setup ovnext0, %v", err)
return
}
if err = c.patchNodeExternalGwLabel(portName, true); err != nil {
klog.Errorf("failed to patch label on node %s, %v", node, err)
return
}
if err = c.patchOvnEipStatus(portName, true); err != nil {
klog.Errorf("failed to patch status for eip %s, %v", portName, err)
return
}
}
func (c *Controller) patchOvnEipStatus(key string, ready bool) error {
cachedOvnEip, err := c.ovnEipsLister.Get(key)
if err != nil {
klog.Errorf("failed to get cached ovn eip '%s', %v", key, err)
return err
}
ovnEip := cachedOvnEip.DeepCopy()
changed := false
if ovnEip.Status.Ready != ready {
ovnEip.Status.Ready = ready
changed = true
}
if changed {
bytes, err := ovnEip.Status.Bytes()
if err != nil {
klog.Errorf("failed to marshal ovn eip status '%s', %v", key, err)
return err
}
if _, err = c.config.KubeOvnClient.KubeovnV1().OvnEips().Patch(context.Background(), ovnEip.Name,
types.MergePatchType, bytes, metav1.PatchOptions{}, "status"); err != nil {
klog.Errorf("failed to patch status for ovn eip '%s', %v", key, err)
return err
}
}
return nil
}
func (c *Controller) patchNodeExternalGwLabel(key string, enabled bool) error {
node, err := c.nodesLister.Get(c.config.NodeName)
if err != nil {
klog.Errorf("failed to get node %s: %v", c.config.NodeName, err)
return err
}
if enabled {
node.Labels[util.NodeExtGwLabel] = "true"
} else {
node.Labels[util.NodeExtGwLabel] = "false"
}
patchPayloadTemplate := `[{ "op": "%s", "path": "/metadata/labels", "value": %s }]`
op := "replace"
if len(node.Labels) == 0 {
op = "add"
}
raw, _ := json.Marshal(node.Labels)
patchPayload := fmt.Sprintf(patchPayloadTemplate, op, raw)
if _, err = c.config.KubeClient.CoreV1().Nodes().Patch(context.Background(), key, types.JSONPatchType, []byte(patchPayload), metav1.PatchOptions{}); err != nil {
klog.Errorf("failed to patch node %s: %v", node.Name, err)
return err
}
return nil
}
func configureMirrorLink(portName string, mtu int) error {
mirrorLink, err := netlink.LinkByName(portName)
if err != nil {
return fmt.Errorf("can not find mirror nic %s: %v", portName, err)
}
if mirrorLink.Attrs().OperState != netlink.OperUp {
if err = netlink.LinkSetUp(mirrorLink); err != nil {
return fmt.Errorf("can not set mirror nic %s up: %v", portName, err)
}
}
return nil
}
func configureNic(link, ip string, macAddr net.HardwareAddr, mtu int, detectIPConflict bool) error {
nodeLink, err := netlink.LinkByName(link)
if err != nil {
return fmt.Errorf("can not find nic %s: %v", link, err)
}
if err = netlink.LinkSetHardwareAddr(nodeLink, macAddr); err != nil {
return fmt.Errorf("can not set mac address to nic %s: %v", link, err)
}
if mtu > 0 {
if nodeLink.Type() == "openvswitch" {
_, err = ovs.Exec("set", "interface", link, fmt.Sprintf(`mtu_request=%d`, mtu))
} else {
err = netlink.LinkSetMTU(nodeLink, mtu)
}
if err != nil {
return fmt.Errorf("failed to set nic %s mtu: %v", link, err)
}
}
if nodeLink.Attrs().OperState != netlink.OperUp {
if err = netlink.LinkSetUp(nodeLink); err != nil {
return fmt.Errorf("can not set node nic %s up: %v", link, err)
}
}
ipDelMap := make(map[string]netlink.Addr)
ipAddMap := make(map[string]netlink.Addr)
ipAddrs, err := netlink.AddrList(nodeLink, unix.AF_UNSPEC)
if err != nil {
return fmt.Errorf("can not get addr %s: %v", nodeLink, err)
}
for _, ipAddr := range ipAddrs {
if ipAddr.IP.IsLinkLocalUnicast() {
// skip 169.254.0.0/16 and fe80::/10
continue
}
ipDelMap[ipAddr.IPNet.String()] = ipAddr
}
for _, ipStr := range strings.Split(ip, ",") {
// Do not reassign same address for link
if _, ok := ipDelMap[ipStr]; ok {
delete(ipDelMap, ipStr)
continue
}
ipAddr, err := netlink.ParseAddr(ipStr)
if err != nil {
return fmt.Errorf("can not parse address %s: %v", ipStr, err)
}
ipAddMap[ipStr] = *ipAddr
}
for ip, addr := range ipDelMap {
klog.Infof("delete ip address %s on %s", ip, link)
if err = netlink.AddrDel(nodeLink, &addr); err != nil {
return fmt.Errorf("delete address %s: %v", addr, err)
}
}
for ip, addr := range ipAddMap {
if detectIPConflict && addr.IP.To4() != nil {
ip := addr.IP.String()
mac, err := util.ArpDetectIPConflict(link, ip, macAddr)
if err != nil {
err = fmt.Errorf("failed to detect address conflict for %s on link %s: %v", ip, link, err)
klog.Error(err)
return err
}
if mac != nil {
return fmt.Errorf("IP address %s has already been used by host with MAC %s", ip, mac)
}
}
klog.Infof("add ip address %s to %s", ip, link)
if err = netlink.AddrAdd(nodeLink, &addr); err != nil {
return fmt.Errorf("can not add address %v to nic %s: %v", addr, link, err)
}
}
return nil
}
func configureLoNic() error {
loLink, err := netlink.LinkByName(util.LoNic)
if err != nil {
err := fmt.Errorf("can not find nic %s, %v", util.LoNic, err)
klog.Error(err)
return err
}
if loLink.Attrs().OperState != netlink.OperUp {
if err = netlink.LinkSetUp(loLink); err != nil {
err := fmt.Errorf("failed to set up nic %s, %v", util.LoNic, err)
klog.Error(err)
return err
}
}
return nil
}
// Add host nic to external bridge
// Mac address, MTU, IP addresses & routes will be copied/transferred to the external bridge
func configProviderNic(nicName, brName string) (int, error) {
nic, err := netlink.LinkByName(nicName)
if err != nil {
return 0, fmt.Errorf("failed to get nic by name %s: %v", nicName, err)
}
bridge, err := netlink.LinkByName(brName)
if err != nil {
return 0, fmt.Errorf("failed to get bridge by name %s: %v", brName, err)
}
sysctlDisableIPv6 := fmt.Sprintf("net.ipv6.conf.%s.disable_ipv6", brName)
disableIPv6, err := sysctl.Sysctl(sysctlDisableIPv6)
if err != nil {
return 0, fmt.Errorf("failed to get sysctl %s: %v", sysctlDisableIPv6, err)
}
if disableIPv6 != "0" {
if _, err = sysctl.Sysctl(sysctlDisableIPv6, "0"); err != nil {
return 0, fmt.Errorf("failed to enable ipv6 on OVS bridge %s: %v", brName, err)
}
}
addrs, err := netlink.AddrList(nic, netlink.FAMILY_ALL)
if err != nil {
return 0, fmt.Errorf("failed to get addresses on nic %s: %v", nicName, err)
}
routes, err := netlink.RouteList(nic, netlink.FAMILY_ALL)
if err != nil {
return 0, fmt.Errorf("failed to get routes on nic %s: %v", nicName, err)
}
// set link unmanaged by NetworkManager
if err = nmSetManaged(nicName, false); err != nil {
klog.Errorf("failed set device %s unmanaged by NetworkManager: %v", nicName, err)
return 0, err
}
for _, addr := range addrs {
if addr.IP.IsLinkLocalUnicast() {
// skip 169.254.0.0/16 and fe80::/10
continue
}
if err = netlink.AddrDel(nic, &addr); err != nil {
errMsg := fmt.Errorf("failed to delete address %q on nic %s: %v", addr.String(), nicName, err)
klog.Error(errMsg)
return 0, errMsg
}
klog.Infof("address %q has been removed from link %s", addr.String(), nicName)
addr.Label = ""
if err = netlink.AddrReplace(bridge, &addr); err != nil {
return 0, fmt.Errorf("failed to replace address %q on OVS bridge %s: %v", addr.String(), brName, err)
}
klog.Infof("address %q has been added/replaced to link %s", addr.String(), brName)
}
// keep mac address the same with the provider nic,
// unless the provider nic is a bond in mode 6, or a vlan interface of a bond in mode 6
albBond, err := linkIsAlbBond(nic)
if err != nil {
return 0, err
}
if !albBond {
if _, err = ovs.Exec("set", "bridge", brName, fmt.Sprintf(`other-config:hwaddr="%s"`, nic.Attrs().HardwareAddr.String())); err != nil {
return 0, fmt.Errorf("failed to set MAC address of OVS bridge %s: %v", brName, err)
}
}
if err = netlink.LinkSetUp(bridge); err != nil {
return 0, fmt.Errorf("failed to set OVS bridge %s up: %v", brName, err)
}
for _, scope := range routeScopeOrders {
for _, route := range routes {
if route.Gw == nil && route.Dst != nil && route.Dst.IP.IsLinkLocalUnicast() {
// skip 169.254.0.0/16 and fe80::/10
continue
}
if route.Scope == scope {
route.LinkIndex = bridge.Attrs().Index
if err = netlink.RouteReplace(&route); err != nil {
return 0, fmt.Errorf("failed to add/replace route %s: %v", route.String(), err)
}
klog.Infof("route %q has been added/replaced to link %s", route.String(), brName)
}
}
}
if _, err = ovs.Exec(ovs.MayExist, "add-port", brName, nicName,
"--", "set", "port", nicName, "external_ids:vendor="+util.CniTypeName); err != nil {
return 0, fmt.Errorf("failed to add %s to OVS bridge %s: %v", nicName, brName, err)
}
klog.V(3).Infof("ovs port %s has been added to bridge %s", nicName, brName)
if err = netlink.LinkSetUp(nic); err != nil {
return 0, fmt.Errorf("failed to set link %s up: %v", nicName, err)
}
return nic.Attrs().MTU, nil
}
func linkIsAlbBond(link netlink.Link) (bool, error) {
check := func(link netlink.Link) bool {
bond, ok := link.(*netlink.Bond)
return ok && bond.Mode == netlink.BOND_MODE_BALANCE_ALB
}
if check(link) {
return true, nil
}
vlan, ok := link.(*netlink.Vlan)
if !ok {
return false, nil
}
parent, err := netlink.LinkByIndex(vlan.ParentIndex)
if err != nil {
klog.Errorf("failed to get link by index %d: %v", vlan.ParentIndex, err)
return false, err
}
return check(parent), nil
}