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https://github.com/k3s-io/kubernetes.git
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ipvs: remove port opener
This commit is contained in:
Khaled (Kal) Henidak
parent
407dcf5164
commit
c4a00b7d90
@ -222,7 +222,6 @@ type Proxier struct {
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mu sync.Mutex // protects the following fields
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serviceMap proxy.ServiceMap
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endpointsMap proxy.EndpointsMap
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portsMap map[netutils.LocalPort]netutils.Closeable
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nodeLabels map[string]string
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// endpointSlicesSynced, and servicesSynced are set to true when
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// corresponding objects are synced after startup. This is used to avoid updating
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@ -248,7 +247,6 @@ type Proxier struct {
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localDetector proxyutiliptables.LocalTrafficDetector
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hostname string
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nodeIP net.IP
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portMapper netutils.PortOpener
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recorder events.EventRecorder
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serviceHealthServer healthcheck.ServiceHealthServer
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@ -453,7 +451,6 @@ func NewProxier(ipt utiliptables.Interface,
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proxier := &Proxier{
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ipFamily: ipFamily,
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portsMap: make(map[netutils.LocalPort]netutils.Closeable),
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serviceMap: make(proxy.ServiceMap),
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serviceChanges: proxy.NewServiceChangeTracker(newServiceInfo, ipFamily, recorder, nil),
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endpointsMap: make(proxy.EndpointsMap),
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@ -468,7 +465,6 @@ func NewProxier(ipt utiliptables.Interface,
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localDetector: localDetector,
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hostname: hostname,
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nodeIP: nodeIP,
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portMapper: &netutils.ListenPortOpener,
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recorder: recorder,
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serviceHealthServer: serviceHealthServer,
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healthzServer: healthzServer,
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@ -1061,8 +1057,6 @@ func (proxier *Proxier) syncProxyRules() {
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set.resetEntries()
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}
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// Accumulate the set of local ports that we will be holding open once this update is complete
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replacementPortsMap := map[netutils.LocalPort]netutils.Closeable{}
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// activeIPVSServices represents IPVS service successfully created in this round of sync
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activeIPVSServices := map[string]bool{}
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// currentIPVSServices represent IPVS services listed from the system
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@ -1127,8 +1121,6 @@ func (proxier *Proxier) syncProxyRules() {
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// reset slice to filtered entries
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nodeIPs = nodeIPs[:idx]
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localAddrSet := utilproxy.GetLocalAddrSet()
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// Build IPVS rules for each service.
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for svcName, svc := range proxier.serviceMap {
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svcInfo, ok := svc.(*serviceInfo)
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@ -1222,41 +1214,6 @@ func (proxier *Proxier) syncProxyRules() {
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// Capture externalIPs.
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for _, externalIP := range svcInfo.ExternalIPStrings() {
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// If the "external" IP happens to be an IP that is local to this
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// machine, hold the local port open so no other process can open it
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// (because the socket might open but it would never work).
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if (svcInfo.Protocol() != v1.ProtocolSCTP) && localAddrSet.Has(netutils.ParseIPSloppy(externalIP)) {
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// We do not start listening on SCTP ports, according to our agreement in the SCTP support KEP
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lp := netutils.LocalPort{
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Description: "externalIP for " + svcNameString,
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IP: externalIP,
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IPFamily: localPortIPFamily,
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Port: svcInfo.Port(),
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Protocol: netutils.Protocol(svcInfo.Protocol()),
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}
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if proxier.portsMap[lp] != nil {
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klog.V(4).InfoS("Port was open before and is still needed", "port", lp)
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replacementPortsMap[lp] = proxier.portsMap[lp]
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} else {
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socket, err := proxier.portMapper.OpenLocalPort(&lp)
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if err != nil {
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msg := fmt.Sprintf("can't open port %s, skipping it", lp.String())
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proxier.recorder.Eventf(
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&v1.ObjectReference{
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Kind: "Node",
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Name: proxier.hostname,
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UID: types.UID(proxier.hostname),
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Namespace: "",
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}, nil, v1.EventTypeWarning, err.Error(), "SyncProxyRules", msg)
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klog.ErrorS(err, "Can't open port, skipping it", "port", lp)
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continue
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}
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klog.V(2).InfoS("Opened local port", "port", lp)
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replacementPortsMap[lp] = socket
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}
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} // We're holding the port, so it's OK to install IPVS rules.
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// ipset call
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entry := &utilipset.Entry{
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IP: externalIP,
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@ -1430,33 +1387,9 @@ func (proxier *Proxier) syncProxyRules() {
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// For ports on node IPs, open the actual port and hold it.
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for _, lp := range lps {
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if proxier.portsMap[lp] != nil {
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klog.V(4).InfoS("Port was open before and is still needed", "port", lp)
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replacementPortsMap[lp] = proxier.portsMap[lp]
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// We do not start listening on SCTP ports, according to our agreement in the
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// SCTP support KEP
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} else if svcInfo.Protocol() != v1.ProtocolSCTP {
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socket, err := proxier.portMapper.OpenLocalPort(&lp)
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if err != nil {
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msg := fmt.Sprintf("can't open port %s, skipping it", lp.String())
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proxier.recorder.Eventf(
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&v1.ObjectReference{
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Kind: "Node",
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Name: proxier.hostname,
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UID: types.UID(proxier.hostname),
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Namespace: "",
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}, nil, v1.EventTypeWarning, err.Error(), "SyncProxyRules", msg)
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klog.ErrorS(err, "Can't open port, skipping it", "port", lp)
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continue
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}
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klog.V(2).InfoS("Opened local port", "port", lp)
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if lp.Protocol == netutils.UDP {
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conntrack.ClearEntriesForPort(proxier.exec, lp.Port, isIPv6, v1.ProtocolUDP)
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}
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replacementPortsMap[lp] = socket
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} // We're holding the port, so it's OK to install ipvs rules.
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if svcInfo.Protocol() != v1.ProtocolSCTP && lp.Protocol == netutils.UDP {
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conntrack.ClearEntriesForPort(proxier.exec, lp.Port, isIPv6, v1.ProtocolUDP)
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}
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}
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// Nodeports need SNAT, unless they're local.
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@ -1614,8 +1547,6 @@ func (proxier *Proxier) syncProxyRules() {
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klog.ErrorS(err, "Failed to execute iptables-restore", "rules", string(proxier.iptablesData.Bytes()))
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}
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metrics.IptablesRestoreFailuresTotal.Inc()
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// Revert new local ports.
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utilproxy.RevertPorts(replacementPortsMap, proxier.portsMap)
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return
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}
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for name, lastChangeTriggerTimes := range endpointUpdateResult.LastChangeTriggerTimes {
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@ -1626,14 +1557,6 @@ func (proxier *Proxier) syncProxyRules() {
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}
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}
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// Close old local ports and save new ones.
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for k, v := range proxier.portsMap {
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if replacementPortsMap[k] == nil {
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v.Close()
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}
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}
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proxier.portsMap = replacementPortsMap
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// Get legacy bind address
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// currentBindAddrs represents ip addresses bind to DefaultDummyDevice from the system
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currentBindAddrs, err := proxier.netlinkHandle.ListBindAddress(DefaultDummyDevice)
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@ -70,18 +70,6 @@ func (f *fakeIPGetter) BindedIPs() (sets.String, error) {
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return f.bindedIPs, nil
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}
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// fakePortOpener implements portOpener.
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type fakePortOpener struct {
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openPorts []*netutils.LocalPort
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}
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// OpenLocalPort fakes out the listen() and bind() used by syncProxyRules
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// to lock a local port.
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func (f *fakePortOpener) OpenLocalPort(lp *netutils.LocalPort) (netutils.Closeable, error) {
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f.openPorts = append(f.openPorts, lp)
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return nil, nil
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}
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// fakeKernelHandler implements KernelHandler.
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type fakeKernelHandler struct {
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modules []string
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@ -153,8 +141,6 @@ func NewFakeProxier(ipt utiliptables.Interface, ipvs utilipvs.Interface, ipset u
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strictARP: false,
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localDetector: proxyutiliptables.NewNoOpLocalDetector(),
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hostname: testHostname,
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portsMap: make(map[netutils.LocalPort]netutils.Closeable),
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portMapper: &fakePortOpener{[]*netutils.LocalPort{}},
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serviceHealthServer: healthcheck.NewFakeServiceHealthServer(),
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ipvsScheduler: DefaultScheduler,
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ipGetter: &fakeIPGetter{nodeIPs: nodeIPs},
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