mirror of https://github.com/k3s-io/k3s
195 lines
6.2 KiB
Go
195 lines
6.2 KiB
Go
// +build windows
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/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package app does all of the work necessary to configure and run a
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// Kubernetes app process.
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package app
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import (
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"errors"
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"fmt"
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"net"
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_ "net/http/pprof"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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utilnet "k8s.io/apimachinery/pkg/util/net"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/proxy"
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proxyconfigapi "k8s.io/kubernetes/pkg/proxy/apis/config"
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proxyconfig "k8s.io/kubernetes/pkg/proxy/config"
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"k8s.io/kubernetes/pkg/proxy/healthcheck"
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"k8s.io/kubernetes/pkg/proxy/winkernel"
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"k8s.io/kubernetes/pkg/proxy/winuserspace"
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"k8s.io/kubernetes/pkg/util/configz"
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utilnetsh "k8s.io/kubernetes/pkg/util/netsh"
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utilnode "k8s.io/kubernetes/pkg/util/node"
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"k8s.io/utils/exec"
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"k8s.io/klog"
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)
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// NewProxyServer returns a new ProxyServer.
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func NewProxyServer(o *Options) (*ProxyServer, error) {
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return newProxyServer(o.config, o.CleanupAndExit, o.scheme, o.master)
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}
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func newProxyServer(config *proxyconfigapi.KubeProxyConfiguration, cleanupAndExit bool, scheme *runtime.Scheme, master string) (*ProxyServer, error) {
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if config == nil {
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return nil, errors.New("config is required")
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}
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if c, err := configz.New(proxyconfigapi.GroupName); err == nil {
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c.Set(config)
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} else {
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return nil, fmt.Errorf("unable to register configz: %s", err)
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}
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// We omit creation of pretty much everything if we run in cleanup mode
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if cleanupAndExit {
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return &ProxyServer{CleanupAndExit: cleanupAndExit}, nil
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}
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client, eventClient, err := createClients(config.ClientConnection, master)
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if err != nil {
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return nil, err
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}
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// Create event recorder
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hostname, err := utilnode.GetHostname(config.HostnameOverride)
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if err != nil {
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return nil, err
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}
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eventBroadcaster := record.NewBroadcaster()
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recorder := eventBroadcaster.NewRecorder(scheme, v1.EventSource{Component: "kube-proxy", Host: hostname})
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nodeRef := &v1.ObjectReference{
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Kind: "Node",
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Name: hostname,
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UID: types.UID(hostname),
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Namespace: "",
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}
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var healthzServer *healthcheck.HealthzServer
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var healthzUpdater healthcheck.HealthzUpdater
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if len(config.HealthzBindAddress) > 0 {
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healthzServer = healthcheck.NewDefaultHealthzServer(config.HealthzBindAddress, 2*config.IPTables.SyncPeriod.Duration, recorder, nodeRef)
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healthzUpdater = healthzServer
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}
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var proxier proxy.ProxyProvider
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var serviceEventHandler proxyconfig.ServiceHandler
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var endpointsEventHandler proxyconfig.EndpointsHandler
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proxyMode := getProxyMode(string(config.Mode), winkernel.WindowsKernelCompatTester{})
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if proxyMode == proxyModeKernelspace {
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klog.V(0).Info("Using Kernelspace Proxier.")
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proxierKernelspace, err := winkernel.NewProxier(
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config.IPTables.SyncPeriod.Duration,
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config.IPTables.MinSyncPeriod.Duration,
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config.IPTables.MasqueradeAll,
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int(*config.IPTables.MasqueradeBit),
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config.ClusterCIDR,
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hostname,
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utilnode.GetNodeIP(client, hostname),
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recorder,
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healthzUpdater,
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)
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if err != nil {
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return nil, fmt.Errorf("unable to create proxier: %v", err)
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}
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proxier = proxierKernelspace
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endpointsEventHandler = proxierKernelspace
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serviceEventHandler = proxierKernelspace
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} else {
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klog.V(0).Info("Using userspace Proxier.")
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execer := exec.New()
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var netshInterface utilnetsh.Interface
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netshInterface = utilnetsh.New(execer)
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// This is a proxy.LoadBalancer which NewProxier needs but has methods we don't need for
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// our config.EndpointsConfigHandler.
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loadBalancer := winuserspace.NewLoadBalancerRR()
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// set EndpointsConfigHandler to our loadBalancer
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endpointsEventHandler = loadBalancer
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proxierUserspace, err := winuserspace.NewProxier(
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loadBalancer,
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net.ParseIP(config.BindAddress),
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netshInterface,
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*utilnet.ParsePortRangeOrDie(config.PortRange),
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// TODO @pires replace below with default values, if applicable
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config.IPTables.SyncPeriod.Duration,
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config.UDPIdleTimeout.Duration,
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)
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if err != nil {
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return nil, fmt.Errorf("unable to create proxier: %v", err)
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}
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proxier = proxierUserspace
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serviceEventHandler = proxierUserspace
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klog.V(0).Info("Tearing down pure-winkernel proxy rules.")
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winkernel.CleanupLeftovers()
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}
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return &ProxyServer{
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Client: client,
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EventClient: eventClient,
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Proxier: proxier,
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Broadcaster: eventBroadcaster,
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Recorder: recorder,
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ProxyMode: proxyMode,
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NodeRef: nodeRef,
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MetricsBindAddress: config.MetricsBindAddress,
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EnableProfiling: config.EnableProfiling,
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OOMScoreAdj: config.OOMScoreAdj,
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ResourceContainer: config.ResourceContainer,
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ConfigSyncPeriod: config.ConfigSyncPeriod.Duration,
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ServiceEventHandler: serviceEventHandler,
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EndpointsEventHandler: endpointsEventHandler,
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HealthzServer: healthzServer,
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}, nil
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}
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func getProxyMode(proxyMode string, kcompat winkernel.KernelCompatTester) string {
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if proxyMode == proxyModeUserspace {
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return proxyModeUserspace
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} else if proxyMode == proxyModeKernelspace {
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return tryWinKernelSpaceProxy(kcompat)
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}
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return proxyModeUserspace
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}
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func tryWinKernelSpaceProxy(kcompat winkernel.KernelCompatTester) string {
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// Check for Windows Kernel Version if we can support Kernel Space proxy
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// Check for Windows Version
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// guaranteed false on error, error only necessary for debugging
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useWinKerelProxy, err := winkernel.CanUseWinKernelProxier(kcompat)
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if err != nil {
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klog.Errorf("Can't determine whether to use windows kernel proxy, using userspace proxier: %v", err)
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return proxyModeUserspace
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}
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if useWinKerelProxy {
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return proxyModeKernelspace
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}
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// Fallback.
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klog.V(1).Infof("Can't use winkernel proxy, using userspace proxier")
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return proxyModeUserspace
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}
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