k3s/vendor/k8s.io/kubernetes/cmd/kube-proxy/app/server_windows.go

195 lines
6.2 KiB
Go

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