mirror of https://github.com/k3s-io/k3s
111 lines
4.0 KiB
Go
111 lines
4.0 KiB
Go
package https
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"strconv"
|
|
"sync"
|
|
|
|
"github.com/gorilla/mux"
|
|
"github.com/k3s-io/k3s/pkg/daemons/config"
|
|
"github.com/k3s-io/k3s/pkg/generated/clientset/versioned/scheme"
|
|
"github.com/k3s-io/k3s/pkg/util"
|
|
"github.com/k3s-io/k3s/pkg/version"
|
|
"k8s.io/apiserver/pkg/authentication/authenticator"
|
|
"k8s.io/apiserver/pkg/authorization/authorizer"
|
|
genericapifilters "k8s.io/apiserver/pkg/endpoints/filters"
|
|
apirequest "k8s.io/apiserver/pkg/endpoints/request"
|
|
"k8s.io/apiserver/pkg/server"
|
|
"k8s.io/apiserver/pkg/server/options"
|
|
)
|
|
|
|
// RouterFunc provides a hook for components to register additional routes to a request router
|
|
type RouterFunc func(ctx context.Context, nodeConfig *config.Node) (*mux.Router, error)
|
|
|
|
var once sync.Once
|
|
var router *mux.Router
|
|
var err error
|
|
|
|
// Start returns a router with authn/authz filters applied.
|
|
// The first time it is called, the router is created and a new HTTPS listener is started if the handler is nil.
|
|
// Subsequent calls will return the same router.
|
|
func Start(ctx context.Context, nodeConfig *config.Node, runtime *config.ControlRuntime) (*mux.Router, error) {
|
|
once.Do(func() {
|
|
router = mux.NewRouter().SkipClean(true)
|
|
config := server.Config{}
|
|
|
|
if runtime == nil {
|
|
// If we do not have an existing handler, set up a new listener
|
|
tcp, lerr := util.ListenWithLoopback(ctx, nodeConfig.AgentConfig.ListenAddress, strconv.Itoa(nodeConfig.ServerHTTPSPort))
|
|
if lerr != nil {
|
|
err = lerr
|
|
return
|
|
}
|
|
|
|
serving := options.NewSecureServingOptions()
|
|
serving.Listener = tcp
|
|
serving.CipherSuites = nodeConfig.AgentConfig.CipherSuites
|
|
serving.MinTLSVersion = nodeConfig.AgentConfig.MinTLSVersion
|
|
serving.ServerCert = options.GeneratableKeyCert{
|
|
CertKey: options.CertKey{
|
|
CertFile: nodeConfig.AgentConfig.ServingKubeletCert,
|
|
KeyFile: nodeConfig.AgentConfig.ServingKubeletKey,
|
|
},
|
|
}
|
|
if aerr := serving.ApplyTo(&config.SecureServing); aerr != nil {
|
|
err = aerr
|
|
return
|
|
}
|
|
} else {
|
|
// If we have an existing handler, wrap it
|
|
router.NotFoundHandler = runtime.Handler
|
|
runtime.Handler = router
|
|
}
|
|
|
|
authn := options.NewDelegatingAuthenticationOptions()
|
|
authn.DisableAnonymous = true
|
|
authn.SkipInClusterLookup = true
|
|
authn.ClientCert = options.ClientCertAuthenticationOptions{
|
|
ClientCA: nodeConfig.AgentConfig.ClientCA,
|
|
}
|
|
authn.RemoteKubeConfigFile = nodeConfig.AgentConfig.KubeConfigKubelet
|
|
if applyErr := authn.ApplyTo(&config.Authentication, config.SecureServing, nil); applyErr != nil {
|
|
err = applyErr
|
|
return
|
|
}
|
|
|
|
authz := options.NewDelegatingAuthorizationOptions()
|
|
authz.AlwaysAllowPaths = []string{ // skip authz for paths that should not use SubjectAccessReview; basically everything that will use this router other than metrics
|
|
"/v1-" + version.Program + "/p2p", // spegel libp2p peer discovery
|
|
"/v2/*", // spegel registry mirror
|
|
"/debug/pprof/*", // profiling
|
|
}
|
|
authz.RemoteKubeConfigFile = nodeConfig.AgentConfig.KubeConfigKubelet
|
|
if applyErr := authz.ApplyTo(&config.Authorization); applyErr != nil {
|
|
err = applyErr
|
|
return
|
|
}
|
|
|
|
router.Use(filterChain(config.Authentication.Authenticator, config.Authorization.Authorizer))
|
|
|
|
if config.SecureServing != nil {
|
|
_, _, err = config.SecureServing.Serve(router, 0, ctx.Done())
|
|
}
|
|
})
|
|
|
|
return router, err
|
|
}
|
|
|
|
// filterChain runs the kubernetes authn/authz filter chain using the mux middleware API
|
|
func filterChain(authn authenticator.Request, authz authorizer.Authorizer) mux.MiddlewareFunc {
|
|
return func(handler http.Handler) http.Handler {
|
|
requestInfoResolver := &apirequest.RequestInfoFactory{}
|
|
failedHandler := genericapifilters.Unauthorized(scheme.Codecs)
|
|
handler = genericapifilters.WithAuthorization(handler, authz, scheme.Codecs)
|
|
handler = genericapifilters.WithAuthentication(handler, authn, failedHandler, nil, nil)
|
|
handler = genericapifilters.WithRequestInfo(handler, requestInfoResolver)
|
|
handler = genericapifilters.WithCacheControl(handler)
|
|
return handler
|
|
}
|
|
}
|