mirror of https://github.com/k3s-io/k3s
134 lines
3.6 KiB
Go
134 lines
3.6 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 kubelet
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"gopkg.in/v1/yaml"
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)
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type KubeletServer struct {
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Kubelet kubeletInterface
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UpdateChannel chan<- manifestUpdate
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}
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// kubeletInterface contains all the kubelet methods required by the server.
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// For testablitiy.
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type kubeletInterface interface {
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GetContainerID(name string) (string, bool, error)
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GetContainerStats(name string) (*api.ContainerStats, error)
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GetContainerInfo(name string) (string, error)
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}
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func (s *KubeletServer) error(w http.ResponseWriter, err error) {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, "Internal Error: %#v", err)
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}
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func (s *KubeletServer) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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u, err := url.ParseRequestURI(req.RequestURI)
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if err != nil {
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s.error(w, err)
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return
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}
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switch {
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case u.Path == "/container" || u.Path == "/containers":
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defer req.Body.Close()
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data, err := ioutil.ReadAll(req.Body)
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if err != nil {
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s.error(w, err)
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return
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}
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if u.Path == "/container" {
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// This is to provide backward compatibility. It only supports a single manifest
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var manifest api.ContainerManifest
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err = yaml.Unmarshal(data, &manifest)
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if err != nil {
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s.error(w, err)
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return
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}
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s.UpdateChannel <- manifestUpdate{httpServerSource, []api.ContainerManifest{manifest}}
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} else if u.Path == "/containers" {
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var manifests []api.ContainerManifest
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err = yaml.Unmarshal(data, &manifests)
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if err != nil {
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s.error(w, err)
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return
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}
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s.UpdateChannel <- manifestUpdate{httpServerSource, manifests}
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}
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case u.Path == "/containerStats":
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container := u.Query().Get("container")
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if len(container) == 0 {
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, "Missing container query arg.")
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return
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}
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stats, err := s.Kubelet.GetContainerStats(container)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, "Internal Error: %#v", err)
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return
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}
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if stats == nil {
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w.WriteHeader(http.StatusOK)
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fmt.Fprint(w, "{}")
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return
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}
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data, err := json.Marshal(stats)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, "Internal Error: %#v", err)
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return
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}
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w.WriteHeader(http.StatusOK)
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w.Header().Add("Content-type", "application/json")
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w.Write(data)
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case u.Path == "/containerInfo":
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container := u.Query().Get("container")
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if len(container) == 0 {
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w.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(w, "Missing container selector arg.")
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return
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}
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id, found, err := s.Kubelet.GetContainerID(container)
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if !found {
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w.WriteHeader(http.StatusOK)
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fmt.Fprint(w, "{}")
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return
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}
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body, err := s.Kubelet.GetContainerInfo(id)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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fmt.Fprintf(w, "Internal Error: %#v", err)
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return
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}
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w.Header().Add("Content-type", "application/json")
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w.WriteHeader(http.StatusOK)
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fmt.Fprint(w, body)
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default:
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w.WriteHeader(http.StatusNotFound)
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fmt.Fprint(w, "Not found.")
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}
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}
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