Merge pull request #217 from brendandburns/demo

Create a proxy server using cloudcfg.  Useful for demos

cmd/cloudcfg/cloudcfg.go

@@ -46,6 +46,8 @@ var (
 	json         = flag.Bool("json", false, "If true, print raw JSON for responses")
 	yaml         = flag.Bool("yaml", false, "If true, print raw YAML for responses")
 	verbose      = flag.Bool("verbose", false, "If true, print extra information")
+	proxy        = flag.Bool("proxy", false, "If true, run a proxy to the api server")
+	www          = flag.String("www", "", "If -proxy is true, use this directory to serve static files")
 )
 
 func usage() {
@@ -96,11 +98,6 @@ func main() {
 		os.Exit(0)
 	}
 
-	if len(flag.Args()) < 1 {
-		usage()
-		os.Exit(1)
-	}
-	method := flag.Arg(0)
 	secure := true
 	parsedUrl, err := url.Parse(*httpServer)
 	if err != nil {
@@ -118,6 +115,18 @@ func main() {
 		}
 	}
 
+	if *proxy {
+		log.Println("Starting to serve on localhost:8001")
+		server := cloudcfg.NewProxyServer(*www, *httpServer, auth)
+		log.Fatal(server.Serve())
+	}
+
+	if len(flag.Args()) < 1 {
+		usage()
+		os.Exit(1)
+	}
+	method := flag.Arg(0)
+
 	matchFound := executeAPIRequest(method, auth) || executeControllerRequest(method, auth)
 	if matchFound == false {
 		log.Fatalf("Unknown command %s", method)

hooks/boilerplate.sh

@@ -6,6 +6,7 @@ LINES=$(cat "$(dirname $0)/boilerplate.txt" | wc -l)
 DIFFER=$(head -$LINES "${FILE}" | diff -q - "$(dirname $0)/boilerplate.txt")
 
 if [[ -z "${DIFFER}" ]]; then
+  echo "${DIFFER}"
   echo "1"
   exit 0
 fi

pkg/api/types.go

@@ -198,6 +198,7 @@ type Status struct {
 	// TODO: if "working", include an operation identifier so final status can be
 	// checked.
 	Status  string `json:"status,omitempty" yaml:"status,omitempty"`
+	Details string `json:"details,omitempty" yaml:"details,omitempty"`
 }
 
 // Values of Status.Status

pkg/client/request.go

@@ -147,7 +147,7 @@ func (r *Request) Body(obj interface{}) *Request {
 	return r
 }
 
-// Format and execute the request.
+// Format and xecute the request. Returns the API object received, or an error.
 func (r *Request) Do() Result {
 	if r.err != nil {
 		return Result{err: r.err}

pkg/cloudcfg/cloudcfg.go

@@ -79,7 +79,9 @@ func Update(name string, client client.ClientInterface, updatePeriod time.Durati
 		return err
 	}
 	for _, pod := range podList.Items {
-		_, err = client.UpdatePod(pod)
+		// We delete the pod here, the controller will recreate it.  This will result in pulling
+		// a new Docker image.  This isn't a full "update" but its what we support for now.
+		err = client.DeletePod(pod.ID)
 		if err != nil {
 			return err
 		}

pkg/cloudcfg/cloudcfg_test.go

@@ -131,8 +131,9 @@ func TestUpdateWithPods(t *testing.T) {
 	}
 	validateAction(Action{action: "get-controller", value: "foo"}, client.actions[0], t)
 	validateAction(Action{action: "list-pods"}, client.actions[1], t)
-	validateAction(Action{action: "update-pod", value: "pod-1"}, client.actions[2], t)
+	// Update deletes the pods, it relies on the replication controller to replace them.
-	validateAction(Action{action: "update-pod", value: "pod-2"}, client.actions[3], t)
+	validateAction(Action{action: "delete-pod", value: "pod-1"}, client.actions[2], t)
+	validateAction(Action{action: "delete-pod", value: "pod-2"}, client.actions[3], t)
 }
 
 func TestUpdateNoPods(t *testing.T) {

pkg/cloudcfg/proxy_server.go

@@ -0,0 +1,90 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cloudcfg
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+)
+
+type ProxyServer struct {
+	Host   string
+	Auth   *client.AuthInfo
+	Client *client.Client
+}
+
+func NewProxyServer(filebase, host string, auth *client.AuthInfo) *ProxyServer {
+	server := &ProxyServer{
+		Host:   host,
+		Auth:   auth,
+		Client: client.New(host, auth),
+	}
+	fileServer := &fileServer{
+		prefix: "/static/",
+		base:   filebase,
+	}
+	http.Handle("/api/", server)
+	http.Handle("/static/", fileServer)
+	return server
+}
+
+// Starts the server, loops forever.
+func (s *ProxyServer) Serve() error {
+	return http.ListenAndServe(":8001", nil)
+}
+
+func (s *ProxyServer) doError(w http.ResponseWriter, err error) {
+	w.WriteHeader(http.StatusInternalServerError)
+	w.Header().Add("Content-type", "application/json")
+	data, _ := api.Encode(api.Status{
+		Status:  api.StatusFailure,
+		Details: fmt.Sprintf("internal error: %#v", err),
+	})
+	w.Write(data)
+}
+
+func (s *ProxyServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	result := s.Client.Verb(r.Method).Path(r.URL.Path).Do()
+	if result.Error() != nil {
+		s.doError(w, result.Error())
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+	w.Header().Add("Content-type", "application/json")
+	data, err := result.Raw()
+	if err != nil {
+		s.doError(w, err)
+		return
+	}
+	w.Write(data)
+}
+
+type fileServer struct {
+	prefix string
+	base   string
+}
+
+func (f *fileServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	filename := r.URL.Path[len(f.prefix):]
+	bytes, _ := ioutil.ReadFile(f.base + filename)
+	w.WriteHeader(http.StatusOK)
+	w.Write(bytes)
+}