740 lines
24 KiB
Go
740 lines
24 KiB
Go
/*
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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 server
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import (
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"crypto/tls"
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"fmt"
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"io"
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"net"
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"net/http"
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"net/http/pprof"
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"net/url"
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"reflect"
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"strconv"
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"strings"
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"time"
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restful "github.com/emicklei/go-restful"
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"github.com/golang/glog"
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cadvisorapi "github.com/google/cadvisor/info/v1"
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cadvisorapiv2 "github.com/google/cadvisor/info/v2"
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"github.com/prometheus/client_golang/prometheus"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apiserver/pkg/authentication/authenticator"
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"k8s.io/apiserver/pkg/authorization/authorizer"
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"k8s.io/apiserver/pkg/healthz"
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"k8s.io/apiserver/pkg/httplog"
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"k8s.io/apiserver/pkg/util/flushwriter"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/api/v1/validation"
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"k8s.io/kubernetes/pkg/kubelet/cm"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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"k8s.io/kubernetes/pkg/kubelet/server/portforward"
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"k8s.io/kubernetes/pkg/kubelet/server/remotecommand"
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"k8s.io/kubernetes/pkg/kubelet/server/stats"
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"k8s.io/kubernetes/pkg/kubelet/server/streaming"
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"k8s.io/kubernetes/pkg/util/configz"
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"k8s.io/kubernetes/pkg/util/limitwriter"
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"k8s.io/kubernetes/pkg/util/term"
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"k8s.io/kubernetes/pkg/volume"
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)
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const (
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metricsPath = "/metrics"
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specPath = "/spec/"
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statsPath = "/stats/"
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logsPath = "/logs/"
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)
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// Server is a http.Handler which exposes kubelet functionality over HTTP.
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type Server struct {
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auth AuthInterface
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host HostInterface
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restfulCont containerInterface
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resourceAnalyzer stats.ResourceAnalyzer
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runtime kubecontainer.Runtime
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}
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type TLSOptions struct {
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Config *tls.Config
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CertFile string
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KeyFile string
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}
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// containerInterface defines the restful.Container functions used on the root container
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type containerInterface interface {
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Add(service *restful.WebService) *restful.Container
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Handle(path string, handler http.Handler)
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Filter(filter restful.FilterFunction)
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ServeHTTP(w http.ResponseWriter, r *http.Request)
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RegisteredWebServices() []*restful.WebService
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// RegisteredHandlePaths returns the paths of handlers registered directly with the container (non-web-services)
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// Used to test filters are being applied on non-web-service handlers
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RegisteredHandlePaths() []string
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}
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// filteringContainer delegates all Handle(...) calls to Container.HandleWithFilter(...),
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// so we can ensure restful.FilterFunctions are used for all handlers
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type filteringContainer struct {
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*restful.Container
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registeredHandlePaths []string
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}
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func (a *filteringContainer) Handle(path string, handler http.Handler) {
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a.HandleWithFilter(path, handler)
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a.registeredHandlePaths = append(a.registeredHandlePaths, path)
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}
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func (a *filteringContainer) RegisteredHandlePaths() []string {
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return a.registeredHandlePaths
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}
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// ListenAndServeKubeletServer initializes a server to respond to HTTP network requests on the Kubelet.
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func ListenAndServeKubeletServer(
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host HostInterface,
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resourceAnalyzer stats.ResourceAnalyzer,
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address net.IP,
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port uint,
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tlsOptions *TLSOptions,
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auth AuthInterface,
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enableDebuggingHandlers bool,
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runtime kubecontainer.Runtime,
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criHandler http.Handler) {
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glog.Infof("Starting to listen on %s:%d", address, port)
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handler := NewServer(host, resourceAnalyzer, auth, enableDebuggingHandlers, runtime, criHandler)
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s := &http.Server{
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Addr: net.JoinHostPort(address.String(), strconv.FormatUint(uint64(port), 10)),
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Handler: &handler,
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MaxHeaderBytes: 1 << 20,
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}
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if tlsOptions != nil {
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s.TLSConfig = tlsOptions.Config
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glog.Fatal(s.ListenAndServeTLS(tlsOptions.CertFile, tlsOptions.KeyFile))
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} else {
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glog.Fatal(s.ListenAndServe())
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}
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}
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// ListenAndServeKubeletReadOnlyServer initializes a server to respond to HTTP network requests on the Kubelet.
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func ListenAndServeKubeletReadOnlyServer(host HostInterface, resourceAnalyzer stats.ResourceAnalyzer, address net.IP, port uint, runtime kubecontainer.Runtime) {
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glog.V(1).Infof("Starting to listen read-only on %s:%d", address, port)
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s := NewServer(host, resourceAnalyzer, nil, false, runtime, nil)
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server := &http.Server{
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Addr: net.JoinHostPort(address.String(), strconv.FormatUint(uint64(port), 10)),
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Handler: &s,
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MaxHeaderBytes: 1 << 20,
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}
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glog.Fatal(server.ListenAndServe())
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}
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// AuthInterface contains all methods required by the auth filters
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type AuthInterface interface {
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authenticator.Request
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authorizer.RequestAttributesGetter
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authorizer.Authorizer
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}
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// HostInterface contains all the kubelet methods required by the server.
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// For testablitiy.
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type HostInterface interface {
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GetContainerInfo(podFullName string, uid types.UID, containerName string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error)
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GetContainerInfoV2(name string, options cadvisorapiv2.RequestOptions) (map[string]cadvisorapiv2.ContainerInfo, error)
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GetRawContainerInfo(containerName string, req *cadvisorapi.ContainerInfoRequest, subcontainers bool) (map[string]*cadvisorapi.ContainerInfo, error)
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GetCachedMachineInfo() (*cadvisorapi.MachineInfo, error)
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GetPods() []*v1.Pod
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GetRunningPods() ([]*v1.Pod, error)
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GetPodByName(namespace, name string) (*v1.Pod, bool)
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RunInContainer(name string, uid types.UID, container string, cmd []string) ([]byte, error)
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ExecInContainer(name string, uid types.UID, container string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan term.Size, timeout time.Duration) error
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AttachContainer(name string, uid types.UID, container string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan term.Size) error
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GetKubeletContainerLogs(podFullName, containerName string, logOptions *v1.PodLogOptions, stdout, stderr io.Writer) error
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ServeLogs(w http.ResponseWriter, req *http.Request)
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PortForward(name string, uid types.UID, port uint16, stream io.ReadWriteCloser) error
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StreamingConnectionIdleTimeout() time.Duration
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ResyncInterval() time.Duration
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GetHostname() string
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GetNode() (*v1.Node, error)
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GetNodeConfig() cm.NodeConfig
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LatestLoopEntryTime() time.Time
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ImagesFsInfo() (cadvisorapiv2.FsInfo, error)
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RootFsInfo() (cadvisorapiv2.FsInfo, error)
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ListVolumesForPod(podUID types.UID) (map[string]volume.Volume, bool)
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GetExec(podFullName string, podUID types.UID, containerName string, cmd []string, streamOpts remotecommand.Options) (*url.URL, error)
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GetAttach(podFullName string, podUID types.UID, containerName string, streamOpts remotecommand.Options) (*url.URL, error)
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GetPortForward(podName, podNamespace string, podUID types.UID) (*url.URL, error)
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}
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// NewServer initializes and configures a kubelet.Server object to handle HTTP requests.
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func NewServer(
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host HostInterface,
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resourceAnalyzer stats.ResourceAnalyzer,
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auth AuthInterface,
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enableDebuggingHandlers bool,
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runtime kubecontainer.Runtime,
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criHandler http.Handler) Server {
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server := Server{
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host: host,
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resourceAnalyzer: resourceAnalyzer,
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auth: auth,
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restfulCont: &filteringContainer{Container: restful.NewContainer()},
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runtime: runtime,
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}
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if auth != nil {
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server.InstallAuthFilter()
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}
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server.InstallDefaultHandlers()
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if enableDebuggingHandlers {
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server.InstallDebuggingHandlers(criHandler)
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}
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return server
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}
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// InstallAuthFilter installs authentication filters with the restful Container.
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func (s *Server) InstallAuthFilter() {
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s.restfulCont.Filter(func(req *restful.Request, resp *restful.Response, chain *restful.FilterChain) {
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// Authenticate
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u, ok, err := s.auth.AuthenticateRequest(req.Request)
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if err != nil {
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glog.Errorf("Unable to authenticate the request due to an error: %v", err)
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resp.WriteErrorString(http.StatusUnauthorized, "Unauthorized")
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return
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}
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if !ok {
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resp.WriteErrorString(http.StatusUnauthorized, "Unauthorized")
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return
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}
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// Get authorization attributes
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attrs := s.auth.GetRequestAttributes(u, req.Request)
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// Authorize
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authorized, _, err := s.auth.Authorize(attrs)
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if err != nil {
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msg := fmt.Sprintf("Authorization error (user=%s, verb=%s, resource=%s, subresource=%s)", u.GetName(), attrs.GetVerb(), attrs.GetResource(), attrs.GetSubresource())
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glog.Errorf(msg, err)
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resp.WriteErrorString(http.StatusInternalServerError, msg)
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return
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}
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if !authorized {
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msg := fmt.Sprintf("Forbidden (user=%s, verb=%s, resource=%s, subresource=%s)", u.GetName(), attrs.GetVerb(), attrs.GetResource(), attrs.GetSubresource())
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glog.V(2).Info(msg)
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resp.WriteErrorString(http.StatusForbidden, msg)
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return
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}
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// Continue
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chain.ProcessFilter(req, resp)
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})
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}
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// InstallDefaultHandlers registers the default set of supported HTTP request
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// patterns with the restful Container.
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func (s *Server) InstallDefaultHandlers() {
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healthz.InstallHandler(s.restfulCont,
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healthz.PingHealthz,
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healthz.NamedCheck("syncloop", s.syncLoopHealthCheck),
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)
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var ws *restful.WebService
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ws = new(restful.WebService)
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ws.
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Path("/pods").
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Produces(restful.MIME_JSON)
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ws.Route(ws.GET("").
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To(s.getPods).
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Operation("getPods"))
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s.restfulCont.Add(ws)
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s.restfulCont.Add(stats.CreateHandlers(statsPath, s.host, s.resourceAnalyzer))
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s.restfulCont.Handle(metricsPath, prometheus.Handler())
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ws = new(restful.WebService)
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ws.
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Path(specPath).
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Produces(restful.MIME_JSON)
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ws.Route(ws.GET("").
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To(s.getSpec).
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Operation("getSpec").
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Writes(cadvisorapi.MachineInfo{}))
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s.restfulCont.Add(ws)
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}
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const pprofBasePath = "/debug/pprof/"
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// InstallDeguggingHandlers registers the HTTP request patterns that serve logs or run commands/containers
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func (s *Server) InstallDebuggingHandlers(criHandler http.Handler) {
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var ws *restful.WebService
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ws = new(restful.WebService)
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ws.
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Path("/run")
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ws.Route(ws.POST("/{podNamespace}/{podID}/{containerName}").
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To(s.getRun).
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Operation("getRun"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{uid}/{containerName}").
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To(s.getRun).
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Operation("getRun"))
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s.restfulCont.Add(ws)
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ws = new(restful.WebService)
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ws.
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Path("/exec")
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ws.Route(ws.GET("/{podNamespace}/{podID}/{containerName}").
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To(s.getExec).
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Operation("getExec"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{containerName}").
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To(s.getExec).
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Operation("getExec"))
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ws.Route(ws.GET("/{podNamespace}/{podID}/{uid}/{containerName}").
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To(s.getExec).
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Operation("getExec"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{uid}/{containerName}").
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To(s.getExec).
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Operation("getExec"))
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s.restfulCont.Add(ws)
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ws = new(restful.WebService)
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ws.
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Path("/attach")
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ws.Route(ws.GET("/{podNamespace}/{podID}/{containerName}").
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To(s.getAttach).
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Operation("getAttach"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{containerName}").
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To(s.getAttach).
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Operation("getAttach"))
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ws.Route(ws.GET("/{podNamespace}/{podID}/{uid}/{containerName}").
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To(s.getAttach).
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Operation("getAttach"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{uid}/{containerName}").
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To(s.getAttach).
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Operation("getAttach"))
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s.restfulCont.Add(ws)
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ws = new(restful.WebService)
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ws.
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Path("/portForward")
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ws.Route(ws.POST("/{podNamespace}/{podID}").
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To(s.getPortForward).
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Operation("getPortForward"))
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ws.Route(ws.POST("/{podNamespace}/{podID}/{uid}").
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To(s.getPortForward).
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Operation("getPortForward"))
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s.restfulCont.Add(ws)
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ws = new(restful.WebService)
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ws.
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Path(logsPath)
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ws.Route(ws.GET("").
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To(s.getLogs).
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Operation("getLogs"))
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ws.Route(ws.GET("/{logpath:*}").
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To(s.getLogs).
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Operation("getLogs").
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Param(ws.PathParameter("logpath", "path to the log").DataType("string")))
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s.restfulCont.Add(ws)
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ws = new(restful.WebService)
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ws.
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Path("/containerLogs")
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ws.Route(ws.GET("/{podNamespace}/{podID}/{containerName}").
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To(s.getContainerLogs).
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Operation("getContainerLogs"))
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s.restfulCont.Add(ws)
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configz.InstallHandler(s.restfulCont)
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handlePprofEndpoint := func(req *restful.Request, resp *restful.Response) {
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name := strings.TrimPrefix(req.Request.URL.Path, pprofBasePath)
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switch name {
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case "profile":
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pprof.Profile(resp, req.Request)
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case "symbol":
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pprof.Symbol(resp, req.Request)
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case "cmdline":
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pprof.Cmdline(resp, req.Request)
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default:
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pprof.Index(resp, req.Request)
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}
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}
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// Setup pprof handlers.
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ws = new(restful.WebService).Path(pprofBasePath)
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ws.Route(ws.GET("/{subpath:*}").To(func(req *restful.Request, resp *restful.Response) {
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handlePprofEndpoint(req, resp)
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})).Doc("pprof endpoint")
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s.restfulCont.Add(ws)
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// The /runningpods endpoint is used for testing only.
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ws = new(restful.WebService)
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ws.
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Path("/runningpods/").
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Produces(restful.MIME_JSON)
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ws.Route(ws.GET("").
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To(s.getRunningPods).
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Operation("getRunningPods"))
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s.restfulCont.Add(ws)
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if criHandler != nil {
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s.restfulCont.Handle("/cri/", criHandler)
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}
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}
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// Checks if kubelet's sync loop that updates containers is working.
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func (s *Server) syncLoopHealthCheck(req *http.Request) error {
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duration := s.host.ResyncInterval() * 2
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minDuration := time.Minute * 5
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if duration < minDuration {
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duration = minDuration
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}
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enterLoopTime := s.host.LatestLoopEntryTime()
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if !enterLoopTime.IsZero() && time.Now().After(enterLoopTime.Add(duration)) {
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return fmt.Errorf("Sync Loop took longer than expected.")
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}
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return nil
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}
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// getContainerLogs handles containerLogs request against the Kubelet
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func (s *Server) getContainerLogs(request *restful.Request, response *restful.Response) {
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podNamespace := request.PathParameter("podNamespace")
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podID := request.PathParameter("podID")
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containerName := request.PathParameter("containerName")
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if len(podID) == 0 {
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// TODO: Why return JSON when the rest return plaintext errors?
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// TODO: Why return plaintext errors?
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response.WriteError(http.StatusBadRequest, fmt.Errorf(`{"message": "Missing podID."}`))
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return
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}
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if len(containerName) == 0 {
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// TODO: Why return JSON when the rest return plaintext errors?
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response.WriteError(http.StatusBadRequest, fmt.Errorf(`{"message": "Missing container name."}`))
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return
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}
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if len(podNamespace) == 0 {
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// TODO: Why return JSON when the rest return plaintext errors?
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response.WriteError(http.StatusBadRequest, fmt.Errorf(`{"message": "Missing podNamespace."}`))
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return
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}
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query := request.Request.URL.Query()
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// backwards compatibility for the "tail" query parameter
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if tail := request.QueryParameter("tail"); len(tail) > 0 {
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query["tailLines"] = []string{tail}
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// "all" is the same as omitting tail
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if tail == "all" {
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delete(query, "tailLines")
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}
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}
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// container logs on the kubelet are locked to the v1 API version of PodLogOptions
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logOptions := &v1.PodLogOptions{}
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if err := api.ParameterCodec.DecodeParameters(query, v1.SchemeGroupVersion, logOptions); err != nil {
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response.WriteError(http.StatusBadRequest, fmt.Errorf(`{"message": "Unable to decode query."}`))
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return
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}
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logOptions.TypeMeta = metav1.TypeMeta{}
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if errs := validation.ValidatePodLogOptions(logOptions); len(errs) > 0 {
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response.WriteError(apierrs.StatusUnprocessableEntity, fmt.Errorf(`{"message": "Invalid request."}`))
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return
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}
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pod, ok := s.host.GetPodByName(podNamespace, podID)
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if !ok {
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response.WriteError(http.StatusNotFound, fmt.Errorf("pod %q does not exist\n", podID))
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return
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}
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// Check if containerName is valid.
|
|
containerExists := false
|
|
for _, container := range pod.Spec.Containers {
|
|
if container.Name == containerName {
|
|
containerExists = true
|
|
break
|
|
}
|
|
}
|
|
if !containerExists {
|
|
for _, container := range pod.Spec.InitContainers {
|
|
if container.Name == containerName {
|
|
containerExists = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if !containerExists {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("container %q not found in pod %q\n", containerName, podID))
|
|
return
|
|
}
|
|
|
|
if _, ok := response.ResponseWriter.(http.Flusher); !ok {
|
|
response.WriteError(http.StatusInternalServerError, fmt.Errorf("unable to convert %v into http.Flusher, cannot show logs\n", reflect.TypeOf(response)))
|
|
return
|
|
}
|
|
fw := flushwriter.Wrap(response.ResponseWriter)
|
|
// Byte limit logic is already implemented in kuberuntime. However, we still need this for
|
|
// old runtime integration.
|
|
// TODO(random-liu): Remove this once we switch to CRI integration.
|
|
if logOptions.LimitBytes != nil {
|
|
fw = limitwriter.New(fw, *logOptions.LimitBytes)
|
|
}
|
|
response.Header().Set("Transfer-Encoding", "chunked")
|
|
if err := s.host.GetKubeletContainerLogs(kubecontainer.GetPodFullName(pod), containerName, logOptions, fw, fw); err != nil {
|
|
if err != limitwriter.ErrMaximumWrite {
|
|
response.WriteError(http.StatusBadRequest, err)
|
|
}
|
|
return
|
|
}
|
|
}
|
|
|
|
// encodePods creates an v1.PodList object from pods and returns the encoded
|
|
// PodList.
|
|
func encodePods(pods []*v1.Pod) (data []byte, err error) {
|
|
podList := new(v1.PodList)
|
|
for _, pod := range pods {
|
|
podList.Items = append(podList.Items, *pod)
|
|
}
|
|
// TODO: this needs to be parameterized to the kubelet, not hardcoded. Depends on Kubelet
|
|
// as API server refactor.
|
|
// TODO: Locked to v1, needs to be made generic
|
|
codec := api.Codecs.LegacyCodec(schema.GroupVersion{Group: v1.GroupName, Version: "v1"})
|
|
return runtime.Encode(codec, podList)
|
|
}
|
|
|
|
// getPods returns a list of pods bound to the Kubelet and their spec.
|
|
func (s *Server) getPods(request *restful.Request, response *restful.Response) {
|
|
pods := s.host.GetPods()
|
|
data, err := encodePods(pods)
|
|
if err != nil {
|
|
response.WriteError(http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
writeJsonResponse(response, data)
|
|
}
|
|
|
|
// getRunningPods returns a list of pods running on Kubelet. The list is
|
|
// provided by the container runtime, and is different from the list returned
|
|
// by getPods, which is a set of desired pods to run.
|
|
func (s *Server) getRunningPods(request *restful.Request, response *restful.Response) {
|
|
pods, err := s.host.GetRunningPods()
|
|
if err != nil {
|
|
response.WriteError(http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
data, err := encodePods(pods)
|
|
if err != nil {
|
|
response.WriteError(http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
writeJsonResponse(response, data)
|
|
}
|
|
|
|
// getLogs handles logs requests against the Kubelet.
|
|
func (s *Server) getLogs(request *restful.Request, response *restful.Response) {
|
|
s.host.ServeLogs(response, request.Request)
|
|
}
|
|
|
|
// getSpec handles spec requests against the Kubelet.
|
|
func (s *Server) getSpec(request *restful.Request, response *restful.Response) {
|
|
info, err := s.host.GetCachedMachineInfo()
|
|
if err != nil {
|
|
response.WriteError(http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
response.WriteEntity(info)
|
|
}
|
|
|
|
type requestParams struct {
|
|
podNamespace string
|
|
podName string
|
|
podUID types.UID
|
|
containerName string
|
|
cmd []string
|
|
}
|
|
|
|
func getRequestParams(req *restful.Request) requestParams {
|
|
return requestParams{
|
|
podNamespace: req.PathParameter("podNamespace"),
|
|
podName: req.PathParameter("podID"),
|
|
podUID: types.UID(req.PathParameter("uid")),
|
|
containerName: req.PathParameter("containerName"),
|
|
cmd: req.Request.URL.Query()[api.ExecCommandParamm],
|
|
}
|
|
}
|
|
|
|
// getAttach handles requests to attach to a container.
|
|
func (s *Server) getAttach(request *restful.Request, response *restful.Response) {
|
|
params := getRequestParams(request)
|
|
streamOpts, err := remotecommand.NewOptions(request.Request)
|
|
if err != nil {
|
|
utilruntime.HandleError(err)
|
|
response.WriteError(http.StatusBadRequest, err)
|
|
return
|
|
}
|
|
pod, ok := s.host.GetPodByName(params.podNamespace, params.podName)
|
|
if !ok {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("pod does not exist"))
|
|
return
|
|
}
|
|
|
|
podFullName := kubecontainer.GetPodFullName(pod)
|
|
redirect, err := s.host.GetAttach(podFullName, params.podUID, params.containerName, *streamOpts)
|
|
if err != nil {
|
|
streaming.WriteError(err, response.ResponseWriter)
|
|
return
|
|
}
|
|
if redirect != nil {
|
|
http.Redirect(response.ResponseWriter, request.Request, redirect.String(), http.StatusFound)
|
|
return
|
|
}
|
|
|
|
remotecommand.ServeAttach(response.ResponseWriter,
|
|
request.Request,
|
|
s.host,
|
|
podFullName,
|
|
params.podUID,
|
|
params.containerName,
|
|
streamOpts,
|
|
s.host.StreamingConnectionIdleTimeout(),
|
|
remotecommand.DefaultStreamCreationTimeout,
|
|
remotecommand.SupportedStreamingProtocols)
|
|
}
|
|
|
|
// getExec handles requests to run a command inside a container.
|
|
func (s *Server) getExec(request *restful.Request, response *restful.Response) {
|
|
params := getRequestParams(request)
|
|
streamOpts, err := remotecommand.NewOptions(request.Request)
|
|
if err != nil {
|
|
utilruntime.HandleError(err)
|
|
response.WriteError(http.StatusBadRequest, err)
|
|
return
|
|
}
|
|
pod, ok := s.host.GetPodByName(params.podNamespace, params.podName)
|
|
if !ok {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("pod does not exist"))
|
|
return
|
|
}
|
|
|
|
podFullName := kubecontainer.GetPodFullName(pod)
|
|
redirect, err := s.host.GetExec(podFullName, params.podUID, params.containerName, params.cmd, *streamOpts)
|
|
if err != nil {
|
|
streaming.WriteError(err, response.ResponseWriter)
|
|
return
|
|
}
|
|
if redirect != nil {
|
|
http.Redirect(response.ResponseWriter, request.Request, redirect.String(), http.StatusFound)
|
|
return
|
|
}
|
|
|
|
remotecommand.ServeExec(response.ResponseWriter,
|
|
request.Request,
|
|
s.host,
|
|
podFullName,
|
|
params.podUID,
|
|
params.containerName,
|
|
params.cmd,
|
|
streamOpts,
|
|
s.host.StreamingConnectionIdleTimeout(),
|
|
remotecommand.DefaultStreamCreationTimeout,
|
|
remotecommand.SupportedStreamingProtocols)
|
|
}
|
|
|
|
// getRun handles requests to run a command inside a container.
|
|
func (s *Server) getRun(request *restful.Request, response *restful.Response) {
|
|
params := getRequestParams(request)
|
|
pod, ok := s.host.GetPodByName(params.podNamespace, params.podName)
|
|
if !ok {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("pod does not exist"))
|
|
return
|
|
}
|
|
|
|
// For legacy reasons, run uses different query param than exec.
|
|
params.cmd = strings.Split(request.QueryParameter("cmd"), " ")
|
|
data, err := s.host.RunInContainer(kubecontainer.GetPodFullName(pod), params.podUID, params.containerName, params.cmd)
|
|
if err != nil {
|
|
response.WriteError(http.StatusInternalServerError, err)
|
|
return
|
|
}
|
|
writeJsonResponse(response, data)
|
|
}
|
|
|
|
// Derived from go-restful writeJSON.
|
|
func writeJsonResponse(response *restful.Response, data []byte) {
|
|
if data == nil {
|
|
response.WriteHeader(http.StatusOK)
|
|
// do not write a nil representation
|
|
return
|
|
}
|
|
response.Header().Set(restful.HEADER_ContentType, restful.MIME_JSON)
|
|
response.WriteHeader(http.StatusOK)
|
|
if _, err := response.Write(data); err != nil {
|
|
glog.Errorf("Error writing response: %v", err)
|
|
}
|
|
}
|
|
|
|
// getPortForward handles a new restful port forward request. It determines the
|
|
// pod name and uid and then calls ServePortForward.
|
|
func (s *Server) getPortForward(request *restful.Request, response *restful.Response) {
|
|
params := getRequestParams(request)
|
|
pod, ok := s.host.GetPodByName(params.podNamespace, params.podName)
|
|
if !ok {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("pod does not exist"))
|
|
return
|
|
}
|
|
if len(params.podUID) > 0 && pod.UID != params.podUID {
|
|
response.WriteError(http.StatusNotFound, fmt.Errorf("pod not found"))
|
|
return
|
|
}
|
|
|
|
redirect, err := s.host.GetPortForward(pod.Name, pod.Namespace, pod.UID)
|
|
if err != nil {
|
|
streaming.WriteError(err, response.ResponseWriter)
|
|
return
|
|
}
|
|
if redirect != nil {
|
|
http.Redirect(response.ResponseWriter, request.Request, redirect.String(), http.StatusFound)
|
|
return
|
|
}
|
|
|
|
portforward.ServePortForward(response.ResponseWriter,
|
|
request.Request,
|
|
s.host,
|
|
kubecontainer.GetPodFullName(pod),
|
|
params.podUID,
|
|
s.host.StreamingConnectionIdleTimeout(),
|
|
remotecommand.DefaultStreamCreationTimeout)
|
|
}
|
|
|
|
// ServeHTTP responds to HTTP requests on the Kubelet.
|
|
func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request) {
|
|
defer httplog.NewLogged(req, &w).StacktraceWhen(
|
|
httplog.StatusIsNot(
|
|
http.StatusOK,
|
|
http.StatusFound,
|
|
http.StatusMovedPermanently,
|
|
http.StatusTemporaryRedirect,
|
|
http.StatusBadRequest,
|
|
http.StatusNotFound,
|
|
http.StatusSwitchingProtocols,
|
|
),
|
|
).Log()
|
|
s.restfulCont.ServeHTTP(w, req)
|
|
}
|