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Merge pull request #103601 from dashpole/webhook_tracing

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Add tracing to admission webhook requests
This commit is contained in:
Kubernetes Prow Robot 2021-07-12 10:22:47 -07:00 committed by GitHub
commit 584658a17d
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 22 additions and 6 deletions
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4
cmd/kube-apiserver/app/server.go
View File

@ -182,7 +182,7 @@ func CreateServerChain(completedOptions completedServerRunOptions, stopCh <-chan
// If additional API servers are added, they should be gated.
apiExtensionsConfig, err := createAPIExtensionsConfig(*kubeAPIServerConfig.GenericConfig, kubeAPIServerConfig.ExtraConfig.VersionedInformers, pluginInitializer, completedOptions.ServerRunOptions, completedOptions.MasterCount,
serviceResolver, webhook.NewDefaultAuthenticationInfoResolverWrapper(kubeAPIServerConfig.ExtraConfig.ProxyTransport, kubeAPIServerConfig.GenericConfig.EgressSelector, kubeAPIServerConfig.GenericConfig.LoopbackClientConfig))
serviceResolver, webhook.NewDefaultAuthenticationInfoResolverWrapper(kubeAPIServerConfig.ExtraConfig.ProxyTransport, kubeAPIServerConfig.GenericConfig.EgressSelector, kubeAPIServerConfig.GenericConfig.LoopbackClientConfig, kubeAPIServerConfig.GenericConfig.TracerProvider))
if err != nil {
return nil, err
}
@ -460,7 +460,7 @@ func buildGenericConfig(
CloudConfigFile: s.CloudProvider.CloudConfigFile,
}
serviceResolver = buildServiceResolver(s.EnableAggregatorRouting, genericConfig.LoopbackClientConfig.Host, versionedInformers)
pluginInitializers, admissionPostStartHook, err = admissionConfig.New(proxyTransport, genericConfig.EgressSelector, serviceResolver)
pluginInitializers, admissionPostStartHook, err = admissionConfig.New(proxyTransport, genericConfig.EgressSelector, serviceResolver, genericConfig.TracerProvider)
if err != nil {
lastErr = fmt.Errorf("failed to create admission plugin initializer: %v", err)
return

1
go.mod
View File

@ -83,6 +83,7 @@ require (
github.com/vmware/govmomi v0.20.3
go.etcd.io/etcd/client/pkg/v3 v3.5.0
go.etcd.io/etcd/client/v3 v3.5.0
go.opentelemetry.io/otel/trace v0.20.0
golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
golang.org/x/exp v0.0.0-20210220032938-85be41e4509f // indirect
golang.org/x/net v0.0.0-20210520170846-37e1c6afe023

6
pkg/kubeapiserver/admission/config.go
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@ -23,6 +23,8 @@ import (
"k8s.io/klog/v2"
"go.opentelemetry.io/otel/trace"
utilwait "k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apiserver/pkg/admission"
webhookinit "k8s.io/apiserver/pkg/admission/plugin/webhook/initializer"
@ -45,8 +47,8 @@ type Config struct {
}
// New sets up the plugins and admission start hooks needed for admission
func (c *Config) New(proxyTransport *http.Transport, egressSelector *egressselector.EgressSelector, serviceResolver webhook.ServiceResolver) ([]admission.PluginInitializer, genericapiserver.PostStartHookFunc, error) {
webhookAuthResolverWrapper := webhook.NewDefaultAuthenticationInfoResolverWrapper(proxyTransport, egressSelector, c.LoopbackClientConfig)
func (c *Config) New(proxyTransport *http.Transport, egressSelector *egressselector.EgressSelector, serviceResolver webhook.ServiceResolver, tp *trace.TracerProvider) ([]admission.PluginInitializer, genericapiserver.PostStartHookFunc, error) {
webhookAuthResolverWrapper := webhook.NewDefaultAuthenticationInfoResolverWrapper(proxyTransport, egressSelector, c.LoopbackClientConfig, tp)
webhookPluginInitializer := webhookinit.NewPluginInitializer(webhookAuthResolverWrapper, serviceResolver)
var cloudConfig []byte

2
staging/src/k8s.io/apiextensions-apiserver/pkg/cmd/server/options/options.go
View File

@ -111,7 +111,7 @@ func (o CustomResourceDefinitionsServerOptions) Config() (*apiserver.Config, err
ExtraConfig: apiserver.ExtraConfig{
CRDRESTOptionsGetter: NewCRDRESTOptionsGetter(*o.RecommendedOptions.Etcd),
ServiceResolver: &serviceResolver{serverConfig.SharedInformerFactory.Core().V1().Services().Lister()},
AuthResolverWrapper: webhook.NewDefaultAuthenticationInfoResolverWrapper(nil, nil, serverConfig.LoopbackClientConfig),
AuthResolverWrapper: webhook.NewDefaultAuthenticationInfoResolverWrapper(nil, nil, serverConfig.LoopbackClientConfig, nil),
},
}
return config, nil

14
staging/src/k8s.io/apiserver/pkg/util/webhook/authentication.go
View File

@ -25,12 +25,17 @@ import (
"strings"
"time"
"go.opentelemetry.io/otel/trace"
corev1 "k8s.io/api/core/v1"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apiserver/pkg/features"
egressselector "k8s.io/apiserver/pkg/server/egressselector"
"k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"k8s.io/component-base/traces"
)
// AuthenticationInfoResolverWrapper can be used to inject Dial function to the
@ -41,7 +46,8 @@ type AuthenticationInfoResolverWrapper func(AuthenticationInfoResolver) Authenti
func NewDefaultAuthenticationInfoResolverWrapper(
proxyTransport *http.Transport,
egressSelector *egressselector.EgressSelector,
kubeapiserverClientConfig *rest.Config) AuthenticationInfoResolverWrapper {
kubeapiserverClientConfig *rest.Config,
tp *trace.TracerProvider) AuthenticationInfoResolverWrapper {
webhookAuthResolverWrapper := func(delegate AuthenticationInfoResolver) AuthenticationInfoResolver {
return &AuthenticationInfoResolverDelegator{
@ -53,6 +59,9 @@ func NewDefaultAuthenticationInfoResolverWrapper(
if err != nil {
return nil, err
}
if feature.DefaultFeatureGate.Enabled(features.APIServerTracing) {
ret.Wrap(traces.WrapperFor(tp))
}
if egressSelector != nil {
networkContext := egressselector.ControlPlane.AsNetworkContext()
@ -75,6 +84,9 @@ func NewDefaultAuthenticationInfoResolverWrapper(
if err != nil {
return nil, err
}
if feature.DefaultFeatureGate.Enabled(features.APIServerTracing) {
ret.Wrap(traces.WrapperFor(tp))
}
if egressSelector != nil {
networkContext := egressselector.Cluster.AsNetworkContext()

1
vendor/modules.txt vendored
View File

@ -929,6 +929,7 @@ go.opentelemetry.io/otel/sdk/metric/controller/time
go.opentelemetry.io/otel/sdk/metric/processor/basic
go.opentelemetry.io/otel/sdk/metric/selector/simple
# go.opentelemetry.io/otel/trace v0.20.0 => go.opentelemetry.io/otel/trace v0.20.0
## explicit
go.opentelemetry.io/otel/trace
# go.opentelemetry.io/proto/otlp v0.7.0 => go.opentelemetry.io/proto/otlp v0.7.0
go.opentelemetry.io/proto/otlp/collector/metrics/v1