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master_config.go
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master_config.go
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package kubernetes
import (
"crypto/tls"
"errors"
"fmt"
"net"
"strconv"
"time"
"github.com/golang/glog"
apiserveroptions "k8s.io/kubernetes/cmd/kube-apiserver/app/options"
cmapp "k8s.io/kubernetes/cmd/kube-controller-manager/app/options"
"k8s.io/kubernetes/pkg/admission"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/apis/autoscaling"
"k8s.io/kubernetes/pkg/apis/batch"
"k8s.io/kubernetes/pkg/apis/extensions"
"k8s.io/kubernetes/pkg/auth/authenticator"
kclient "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/cloudprovider"
"k8s.io/kubernetes/pkg/genericapiserver"
"k8s.io/kubernetes/pkg/genericapiserver/authorizer"
kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
"k8s.io/kubernetes/pkg/master"
"k8s.io/kubernetes/pkg/registry/cachesize"
kerrors "k8s.io/kubernetes/pkg/util/errors"
"k8s.io/kubernetes/pkg/util/intstr"
knet "k8s.io/kubernetes/pkg/util/net"
scheduleroptions "k8s.io/kubernetes/plugin/cmd/kube-scheduler/app/options"
"github.com/openshift/origin/pkg/cmd/flagtypes"
configapi "github.com/openshift/origin/pkg/cmd/server/api"
cmdflags "github.com/openshift/origin/pkg/cmd/util/flags"
"github.com/openshift/origin/pkg/controller/shared"
)
// MasterConfig defines the required values to start a Kubernetes master
type MasterConfig struct {
Options configapi.KubernetesMasterConfig
KubeClient *kclient.Client
Master *master.Config
ControllerManager *cmapp.CMServer
SchedulerServer *scheduleroptions.SchedulerServer
CloudProvider cloudprovider.Interface
Informers shared.InformerFactory
}
// BuildDefaultAPIServer constructs the appropriate APIServer and StorageFactory for the kubernetes server.
// It returns an error if no KubernetesMasterConfig was defined.
func BuildDefaultAPIServer(options configapi.MasterConfig) (*apiserveroptions.APIServer, genericapiserver.StorageFactory, error) {
if options.KubernetesMasterConfig == nil {
return nil, nil, fmt.Errorf("no kubernetesMasterConfig defined, unable to load settings")
}
_, portString, err := net.SplitHostPort(options.ServingInfo.BindAddress)
if err != nil {
return nil, nil, err
}
port, err := strconv.Atoi(portString)
if err != nil {
return nil, nil, err
}
portRange, err := knet.ParsePortRange(options.KubernetesMasterConfig.ServicesNodePortRange)
if err != nil {
return nil, nil, err
}
// Defaults are tested in TestAPIServerDefaults
server := apiserveroptions.NewAPIServer()
// Adjust defaults
server.EventTTL = 2 * time.Hour
server.ServiceClusterIPRange = net.IPNet(flagtypes.DefaultIPNet(options.KubernetesMasterConfig.ServicesSubnet))
server.ServiceNodePortRange = *portRange
server.EnableLogsSupport = false // don't expose server logs
server.EnableProfiling = false
server.APIPrefix = KubeAPIPrefix
server.APIGroupPrefix = KubeAPIGroupPrefix
server.SecurePort = port
server.MasterCount = options.KubernetesMasterConfig.MasterCount
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubernetesMasterConfig.APIServerArguments, server.AddFlags); len(err) > 0 {
return nil, nil, kerrors.NewAggregate(err)
}
resourceEncodingConfig := genericapiserver.NewDefaultResourceEncodingConfig()
resourceEncodingConfig.SetVersionEncoding(
kapi.GroupName,
unversioned.GroupVersion{Group: kapi.GroupName, Version: options.EtcdStorageConfig.KubernetesStorageVersion},
kapi.SchemeGroupVersion,
)
resourceEncodingConfig.SetVersionEncoding(
extensions.GroupName,
unversioned.GroupVersion{Group: extensions.GroupName, Version: "v1beta1"},
extensions.SchemeGroupVersion,
)
resourceEncodingConfig.SetVersionEncoding(
batch.GroupName,
unversioned.GroupVersion{Group: batch.GroupName, Version: "v1"},
batch.SchemeGroupVersion,
)
resourceEncodingConfig.SetVersionEncoding(
autoscaling.GroupName,
unversioned.GroupVersion{Group: autoscaling.GroupName, Version: "v1"},
autoscaling.SchemeGroupVersion,
)
storageGroupsToEncodingVersion, err := server.StorageGroupsToEncodingVersion()
if err != nil {
return nil, nil, err
}
// use the stock storage config based on args, but override bits from our config where appropriate
etcdConfig := server.StorageConfig
etcdConfig.Prefix = options.EtcdStorageConfig.KubernetesStoragePrefix
etcdConfig.ServerList = options.EtcdClientInfo.URLs
etcdConfig.KeyFile = options.EtcdClientInfo.ClientCert.KeyFile
etcdConfig.CertFile = options.EtcdClientInfo.ClientCert.CertFile
etcdConfig.CAFile = options.EtcdClientInfo.CA
storageFactory, err := genericapiserver.BuildDefaultStorageFactory(
etcdConfig,
server.DefaultStorageMediaType,
kapi.Codecs,
genericapiserver.NewDefaultResourceEncodingConfig(),
storageGroupsToEncodingVersion,
// FIXME: this GroupVersionResource override should be configurable
[]unversioned.GroupVersionResource{batch.Resource("scheduledjobs").WithVersion("v2alpha1")},
master.DefaultAPIResourceConfigSource(), server.RuntimeConfig,
)
if err != nil {
return nil, nil, err
}
/*storageFactory := genericapiserver.NewDefaultStorageFactory(
etcdConfig,
server.DefaultStorageMediaType,
kapi.Codecs,
resourceEncodingConfig,
master.DefaultAPIResourceConfigSource(),
)*/
// the order here is important, it defines which version will be used for storage
storageFactory.AddCohabitatingResources(extensions.Resource("jobs"), batch.Resource("jobs"))
storageFactory.AddCohabitatingResources(extensions.Resource("horizontalpodautoscalers"), autoscaling.Resource("horizontalpodautoscalers"))
return server, storageFactory, nil
}
func BuildKubernetesMasterConfig(options configapi.MasterConfig, requestContextMapper kapi.RequestContextMapper, kubeClient *kclient.Client, informers shared.InformerFactory, admissionControl admission.Interface, originAuthenticator authenticator.Request) (*MasterConfig, error) {
if options.KubernetesMasterConfig == nil {
return nil, errors.New("insufficient information to build KubernetesMasterConfig")
}
kubeletClientConfig := configapi.GetKubeletClientConfig(options)
kubeletClient, err := kubeletclient.NewStaticKubeletClient(kubeletClientConfig)
if err != nil {
return nil, fmt.Errorf("unable to configure Kubelet client: %v", err)
}
// in-order list of plug-ins that should intercept admission decisions
// TODO: Push node environment support to upstream in future
podEvictionTimeout, err := time.ParseDuration(options.KubernetesMasterConfig.PodEvictionTimeout)
if err != nil {
return nil, fmt.Errorf("unable to parse PodEvictionTimeout: %v", err)
}
// Defaults are tested in TestCMServerDefaults
cmserver := cmapp.NewCMServer()
// Adjust defaults
cmserver.Address = "" // no healthz endpoint
cmserver.Port = 0 // no healthz endpoint
cmserver.EnableGarbageCollector = false // disabled until we add the controller
cmserver.PodEvictionTimeout = unversioned.Duration{Duration: podEvictionTimeout}
cmserver.VolumeConfiguration.EnableDynamicProvisioning = options.VolumeConfig.DynamicProvisioningEnabled
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
if err := cmdflags.Resolve(options.KubernetesMasterConfig.ControllerArguments, cmserver.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
// resolve extended arguments
// TODO: this should be done in config validation (along with the above) so we can provide
// proper errors
schedulerserver := scheduleroptions.NewSchedulerServer()
schedulerserver.PolicyConfigFile = options.KubernetesMasterConfig.SchedulerConfigFile
if err := cmdflags.Resolve(options.KubernetesMasterConfig.SchedulerArguments, schedulerserver.AddFlags); len(err) > 0 {
return nil, kerrors.NewAggregate(err)
}
cloud, err := cloudprovider.InitCloudProvider(cmserver.CloudProvider, cmserver.CloudConfigFile)
if err != nil {
return nil, err
}
if cloud != nil {
glog.V(2).Infof("Successfully initialized cloud provider: %q from the config file: %q\n", cmserver.CloudProvider, cmserver.CloudConfigFile)
}
var proxyClientCerts []tls.Certificate
if len(options.KubernetesMasterConfig.ProxyClientInfo.CertFile) > 0 {
clientCert, err := tls.LoadX509KeyPair(
options.KubernetesMasterConfig.ProxyClientInfo.CertFile,
options.KubernetesMasterConfig.ProxyClientInfo.KeyFile,
)
if err != nil {
return nil, err
}
proxyClientCerts = append(proxyClientCerts, clientCert)
}
server, storageFactory, err := BuildDefaultAPIServer(options)
if err != nil {
return nil, err
}
// Preserve previous behavior of using the first non-loopback address
// TODO: Deprecate this behavior and just require a valid value to be passed in
publicAddress := net.ParseIP(options.KubernetesMasterConfig.MasterIP)
if publicAddress == nil || publicAddress.IsUnspecified() || publicAddress.IsLoopback() {
hostIP, err := knet.ChooseHostInterface()
if err != nil {
glog.Fatalf("Unable to find suitable network address.error='%v'. Set the masterIP directly to avoid this error.", err)
}
publicAddress = hostIP
glog.Infof("Will report %v as public IP address.", publicAddress)
}
m := &master.Config{
Config: &genericapiserver.Config{
PublicAddress: publicAddress,
ReadWritePort: server.SecurePort,
Authenticator: originAuthenticator, // this is used to fulfill the tokenreviews endpoint which is used by node authentication
Authorizer: authorizer.NewAlwaysAllowAuthorizer(),
AdmissionControl: admissionControl,
StorageFactory: storageFactory,
ServiceClusterIPRange: (*net.IPNet)(&server.ServiceClusterIPRange),
ServiceNodePortRange: server.ServiceNodePortRange,
RequestContextMapper: requestContextMapper,
APIResourceConfigSource: getAPIResourceConfig(options),
APIPrefix: server.APIPrefix,
APIGroupPrefix: server.APIGroupPrefix,
MasterCount: server.MasterCount,
// Set the TLS options for proxying to pods and services
// Proxying to nodes uses the kubeletClient TLS config (so can provide a different cert, and verify the node hostname)
ProxyTLSClientConfig: &tls.Config{
// Proxying to pods and services cannot verify hostnames, since they are contacted on randomly allocated IPs
InsecureSkipVerify: true,
Certificates: proxyClientCerts,
},
Serializer: kapi.Codecs,
EnableLogsSupport: server.EnableLogsSupport,
EnableProfiling: server.EnableProfiling,
EnableWatchCache: server.EnableWatchCache,
MasterServiceNamespace: server.MasterServiceNamespace,
ExternalHost: server.ExternalHost,
MinRequestTimeout: server.MinRequestTimeout,
KubernetesServiceNodePort: server.KubernetesServiceNodePort,
},
EventTTL: server.EventTTL,
KubeletClient: kubeletClient,
EnableCoreControllers: true,
DeleteCollectionWorkers: server.DeleteCollectionWorkers,
}
if server.EnableWatchCache {
cachesize.SetWatchCacheSizes(server.WatchCacheSizes)
}
if options.DNSConfig != nil {
_, dnsPortStr, err := net.SplitHostPort(options.DNSConfig.BindAddress)
if err != nil {
return nil, fmt.Errorf("unable to parse DNS bind address %s: %v", options.DNSConfig.BindAddress, err)
}
dnsPort, err := strconv.Atoi(dnsPortStr)
if err != nil {
return nil, fmt.Errorf("invalid DNS port: %v", err)
}
m.ExtraServicePorts = append(m.ExtraServicePorts,
kapi.ServicePort{Name: "dns", Port: 53, Protocol: kapi.ProtocolUDP, TargetPort: intstr.FromInt(dnsPort)},
kapi.ServicePort{Name: "dns-tcp", Port: 53, Protocol: kapi.ProtocolTCP, TargetPort: intstr.FromInt(dnsPort)},
)
m.ExtraEndpointPorts = append(m.ExtraEndpointPorts,
kapi.EndpointPort{Name: "dns", Port: int32(dnsPort), Protocol: kapi.ProtocolUDP},
kapi.EndpointPort{Name: "dns-tcp", Port: int32(dnsPort), Protocol: kapi.ProtocolTCP},
)
}
kmaster := &MasterConfig{
Options: *options.KubernetesMasterConfig,
KubeClient: kubeClient,
Master: m,
ControllerManager: cmserver,
CloudProvider: cloud,
SchedulerServer: schedulerserver,
Informers: informers,
}
return kmaster, nil
}
// getAPIResourceConfig builds the config for enabling resources
func getAPIResourceConfig(options configapi.MasterConfig) genericapiserver.APIResourceConfigSource {
resourceConfig := genericapiserver.NewResourceConfig()
for group := range configapi.KnownKubeAPIGroups {
for _, version := range configapi.GetEnabledAPIVersionsForGroup(*options.KubernetesMasterConfig, group) {
gv := unversioned.GroupVersion{Group: group, Version: version}
resourceConfig.EnableVersions(gv)
}
}
for group := range options.KubernetesMasterConfig.DisabledAPIGroupVersions {
for _, version := range configapi.GetDisabledAPIVersionsForGroup(*options.KubernetesMasterConfig, group) {
gv := unversioned.GroupVersion{Group: group, Version: version}
resourceConfig.DisableVersions(gv)
}
}
return resourceConfig
}