add 'porter' test container

contrib/for-tests/porter/.gitignore

+porter
+.tag

contrib/for-tests/porter/Dockerfile

+# Copyright 2015 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.
+
+FROM scratch
+MAINTAINER Daniel Smith <dbsmith@google.com>
+ADD porter porter
+ENTRYPOINT ["/porter"]

contrib/for-tests/porter/Makefile

+# Use:
+#
+# `make porter` will build porter.
+# `make tag` will suggest a tag.
+# `make container` will build a container-- you must supply a tag.
+# `make push` will push the container-- you must supply a tag.
+
+REPO ?= gcr.io/google_containers
+
+porter: porter.go
+	CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' ./porter.go
+
+.tag: porter
+	md5sum porter | cut -d " " -f 1 > .tag
+
+tag: .tag
+	@echo "Suggest using TAG=$(shell cat .tag)"
+	@echo "$$ make container TAG=$(shell cat .tag)"
+	@echo "or"
+	@echo "$$ make push TAG=$(shell cat .tag)"
+
+container:
+	$(if $(TAG),,$(error TAG is not defined. Use 'make tag' to see a suggestion))
+	docker build -t $(REPO)/porter:$(TAG) .
+
+push:
+	$(if $(TAG),,$(error TAG is not defined. Use 'make tag' to see a suggestion))
+	gcloud preview docker push $(REPO)/porter:$(TAG)
+
+clean:
+	rm -f porter
+	rm -f .tag

contrib/for-tests/porter/README.md

+This directory contains go source, Dockerfile and Makefile for making a test
+container which serves requested data on ports specified in ENV variables.
+
+
+[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/contrib/for-tests/porter/README.md?pixel)]()

contrib/for-tests/porter/pod.json

+{
+  "kind": "Pod",
+  "apiVersion": "v1",
+  "metadata": {
+    "name": "kubectl-tester"
+  },
+  "spec": {
+    "containers": [
+      {
+        "name": "bb",
+        "image": "gcr.io/google_containers/busybox",
+        "command": [
+          "sh", "-c", "sleep 5; wget -O - ${KUBERNETES_RO_SERVICE_HOST}:${KUBERNETES_RO_SERVICE_PORT}/api/v1/pods/; sleep 10000"
+        ],
+        "ports": [
+          {
+            "containerPort": 8080
+          }
+        ],
+        "env": [
+          {
+            "name": "KUBERNETES_RO_SERVICE_HOST",
+            "value": "127.0.0.1"
+          },
+          {
+            "name": "KUBERNETES_RO_SERVICE_PORT",
+            "value": "8001"
+          }
+        ],
+        "volumeMounts": [
+          {
+            "name": "test-volume",
+            "mountPath": "/mount/test-volume"
+          }
+        ]
+      },
+      {
+        "name": "kubectl",
+        "image": "gcr.io/google_containers/kubectl:v0.18.0-120-gaeb4ac55ad12b1-dirty",
+        "imagePullPolicy": "Always",
+        "args": [
+          "proxy", "-p", "8001"
+        ]
+      }
+    ],
+    "volumes": [
+      {
+        "name": "test-volume",
+        "emptyDir": {}
+      }
+    ]
+  }
+}

contrib/for-tests/porter/porter.go

+/*
+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.
+*/
+
+// A tiny binary for testing ports.
+//
+// Reads env vars; for every var of the form SERVE_PORT_X, where X is a valid
+// port number, porter starts an HTTP server which serves the env var's value
+// in response to any query.
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+)
+
+const prefix = "SERVE_PORT_"
+
+func main() {
+	for _, vk := range os.Environ() {
+		parts := strings.Split(vk, "=")
+		key := parts[0]
+		value := parts[1]
+		if strings.HasPrefix(key, prefix) {
+			port := strings.TrimPrefix(key, prefix)
+			go servePort(port, value)
+		}
+	}
+
+	select {}
+}
+
+func servePort(port, value string) {
+	s := &http.Server{
+		Addr: "0.0.0.0:" + port,
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			fmt.Fprint(w, value)
+		}),
+	}
+	log.Printf("server on port %q failed: %v", port, s.ListenAndServe())
+}