Add kube-ui cluster addon for serving k8s dashboard UI.

Changes include:
- Add kube-ui binary for serving static dashboard UI
- Add kube-ui docker image, replication controller, and service
- Make the kube-ui a cluster-addon (enabled by default)
- Split the compiled pkg/ui/datafile.go into separate dashboard and swagger packages
- Update docs to reflect changes

cluster/addons/kube-ui/image/Dockerfile

@@ -0,0 +1,19 @@
+# Copyright 2015 The Kubernetes Authors. 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.
+
+FROM scratch
+MAINTAINER Tim St. Clair <stclair@google.com>
+ADD kube-ui kube-ui
+EXPOSE 8080
+ENTRYPOINT ["/kube-ui"]

cluster/addons/kube-ui/image/Makefile

@@ -0,0 +1,23 @@
+# Makefile for the Docker image gcr.io/google_containers/kube-ui
+# MAINTAINER: Tim St. Clair <stclair@google.com>
+# If you update this image please check the tag value before pushing.
+
+.PHONY: all container push clean
+
+# Keep this at dev, so no one accidentally blows away the latest published version.
+TAG = dev # current version: v1
+PREFIX = gcr.io/google_containers
+
+all: push
+
+kube-ui: kube-ui.go
+	CGO_ENABLED=0 GOOS=linux godep go build -a -installsuffix cgo -ldflags '-w' ./kube-ui.go
+
+container: kube-ui
+	docker build -t $(PREFIX)/kube-ui:$(TAG) .
+
+push: container
+	gcloud docker push $(PREFIX)/kube-ui:$(TAG)
+
+clean:
+	rm -f kube-ui

cluster/addons/kube-ui/image/kube-ui.go

@@ -0,0 +1,54 @@
+/*
+Copyright 2014 The Kubernetes Authors 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.
+*/
+
+// A simple static web server for hosting the Kubernetes cluster UI.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"mime"
+	"net/http"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/ui/data/dashboard"
+	"github.com/golang/glog"
+
+	assetfs "github.com/elazarl/go-bindata-assetfs"
+)
+
+var (
+	port = flag.Int("port", 8080, "Port number to serve at.")
+)
+
+func main() {
+	flag.Parse()
+
+	// Send correct mime type for .svg files.  TODO: remove when
+	// https://github.com/golang/go/commit/21e47d831bafb59f22b1ea8098f709677ec8ce33
+	// makes it into all of our supported go versions.
+	mime.AddExtensionType(".svg", "image/svg+xml")
+
+	// Expose files in www/ on <host>
+	fileServer := http.FileServer(&assetfs.AssetFS{
+		Asset:    dashboard.Asset,
+		AssetDir: dashboard.AssetDir,
+		Prefix:   "www/app",
+	})
+	http.Handle("/", fileServer)
+
+	// TODO: Add support for serving over TLS.
+	glog.Fatal(http.ListenAndServe(fmt.Sprintf("0.0.0.0:%d", *port), nil))
+}

cluster/addons/kube-ui/kube-ui-rc.yaml

@@ -0,0 +1,26 @@
+apiVersion: v1
+kind: ReplicationController
+metadata:
+  name: kube-ui-v1
+  namespace: default
+  labels:
+    k8s-app: kube-ui
+    version: v1
+    kubernetes.io/cluster-service: "true"
+spec:
+  replicas: 1
+  selector:
+    k8s-app: kube-ui
+    version: v1
+  template:
+    metadata:
+      labels:
+        k8s-app: kube-ui
+        version: v1
+        kubernetes.io/cluster-service: "true"
+    spec:
+      containers:
+      - name: kube-ui
+        image: gcr.io/google_containers/kube-ui:v1
+        ports:
+        - containerPort: 8080

cluster/addons/kube-ui/kube-ui-svc.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: kube-ui
+  namespace: default
+  labels:
+    k8s-app: kube-ui
+    kubernetes.io/cluster-service: "true"
+    kubernetes.io/name: "KubeUI"
+spec:
+  selector:
+    k8s-app: kube-ui
+  ports:
+  - port: 80
+    targetPort: 8080

cluster/saltbase/salt/kube-addons/init.sls

@@ -87,6 +87,17 @@ addon-dir-create:
     - file_mode: 644
 {% endif %}
 
+{% if pillar.get('enable_cluster_ui', 'true').lower() == 'true' %}
+/etc/kubernetes/addons/kube-ui:
+  file.recurse:
+    - source: salt://kube-addons/kube-ui
+    - include_pat: E@^.+\.yaml$
+    - user: root
+    - group: root
+    - dir_mode: 755
+    - file_mode: 644
+{% endif %}
+
 /etc/kubernetes/kube-addons.sh:
   file.managed:
     - source: salt://kube-addons/kube-addons.sh