Merge pull request #48494 from mkumatag/webserver

Automatic merge from submit-queue (batch tested with PRs 48494, 48733)

Move test-webserver from contrib/for-demos to kubernetes/test/images

**What this PR does / why we need it**:
This PR is for
- Moving the https://github.com/kubernetes/contrib/tree/master/for-demos/test-webserver to kubernetes/test/images - Refer https://github.com/kubernetes/contrib/pull/2544 for more information
- Multi architecture support for test-webserver image

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
```

hack/.linted_packages

@@ -482,6 +482,7 @@ test/images/port-forward-tester
 test/images/porter
 test/images/resource-consumer/consume-cpu
 test/images/serve-hostname
+test/images/test-webserver
 test/integration/apiserver
 test/integration/client
 test/integration/configmap

test/images/BUILD

@@ -34,6 +34,7 @@ filegroup(
         "//test/images/porter:all-srcs",
         "//test/images/resource-consumer:all-srcs",
         "//test/images/serve-hostname:all-srcs",
+        "//test/images/test-webserver:all-srcs",
     ],
     tags = ["automanaged"],
 )

test/images/test-webserver/BUILD

@@ -0,0 +1,34 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_binary",
+    "go_library",
+)
+
+go_binary(
+    name = "test-webserver",
+    library = ":go_default_library",
+    tags = ["automanaged"],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["test-webserver.go"],
+    tags = ["automanaged"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+)

test/images/test-webserver/Dockerfile

@@ -0,0 +1,19 @@
+# Copyright 2014 The Kubernetes Authors.
+#
+# 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
+
+COPY test-webserver /
+EXPOSE 80
+ENTRYPOINT ["/test-webserver"]

test/images/test-webserver/Makefile

@@ -0,0 +1,25 @@
+# Copyright 2017 The Kubernetes Authors.
+#
+# 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.
+
+SRCS = test-webserver
+ARCH ?= amd64
+TARGET ?= $(CURDIR)
+GOLANG_VERSION ?= latest
+SRC_DIR = $(notdir $(shell pwd))
+export
+
+bin:
+	../image-util.sh bin $(SRCS)
+
+.PHONY: bin

test/images/test-webserver/VERSION

@@ -0,0 +1 @@
+1.0

test/images/test-webserver/test-webserver.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+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 web server that serves a static file.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+)
+
+var (
+	port = flag.Int("port", 80, "Port number.")
+)
+
+func main() {
+	flag.Parse()
+
+	fs := http.StripPrefix("/", http.FileServer(http.Dir("/")))
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", "private")
+		// Needed for local proxy to Kubernetes API server to work.
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Credentials", "true")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,Cache-Control,Content-Type")
+		// Disable If-Modified-Since so update-demo isn't broken by 304s
+		r.Header.Del("If-Modified-Since")
+		fs.ServeHTTP(w, r)
+	})
+
+	go log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", *port), nil))
+
+	select {}
+}