Add Global Rate Limiting support

test/e2e/annotations/globalratelimit.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2020 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.
+*/
+
+package annotations
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/onsi/ginkgo"
+	"github.com/stretchr/testify/assert"
+
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.DescribeAnnotation("annotation-global-rate-limit", func() {
+	f := framework.NewDefaultFramework("global-rate-limit")
+	host := "global-rate-limit-annotation"
+
+	ginkgo.BeforeEach(func() {
+		f.NewEchoDeployment()
+	})
+
+	ginkgo.It("generates correct configuration", func() {
+		annotations := make(map[string]string)
+		annotations["nginx.ingress.kubernetes.io/global-rate-limit"] = "5"
+		annotations["nginx.ingress.kubernetes.io/global-rate-limit-window"] = "2m"
+
+		ing := framework.NewSingleIngress(host, "/", host, f.Namespace, framework.EchoService, 80, annotations)
+		ing = f.EnsureIngress(ing)
+		namespace := strings.Replace(string(ing.UID), "-", "", -1)
+
+		serverConfig := ""
+		f.WaitForNginxServer(host, func(server string) bool {
+			serverConfig = server
+			return true
+		})
+		assert.Contains(ginkgo.GinkgoT(), serverConfig,
+			fmt.Sprintf(`global_throttle = { namespace = "%v", `+
+				`limit = 5, window_size = 120, key = { { nil, nil, "remote_addr", nil, }, }, `+
+				`ignored_cidrs = { } }`,
+				namespace))
+
+		f.HTTPTestClient().GET("/").WithHeader("Host", host).Expect().Status(http.StatusOK)
+
+		ginkgo.By("regenerating the correct configuration after update")
+		annotations["nginx.ingress.kubernetes.io/global-rate-limit-key"] = "${remote_addr}${http_x_api_client}"
+		annotations["nginx.ingress.kubernetes.io/global-rate-limit-ignored-cidrs"] = "192.168.1.1, 234.234.234.0/24"
+		ing.SetAnnotations(annotations)
+
+		f.WaitForReload(func() {
+			ing = f.UpdateIngress(ing)
+		})
+
+		serverConfig = ""
+		f.WaitForNginxServer(host, func(server string) bool {
+			serverConfig = server
+			return true
+		})
+		assert.Contains(ginkgo.GinkgoT(), serverConfig,
+			fmt.Sprintf(`global_throttle = { namespace = "%v", `+
+				`limit = 5, window_size = 120, `+
+				`key = { { nil, "remote_addr", nil, nil, }, { nil, "http_x_api_client", nil, nil, }, }, `+
+				`ignored_cidrs = { "192.168.1.1", "234.234.234.0/24", } }`,
+				namespace))
+
+		f.HTTPTestClient().GET("/").WithHeader("Host", host).Expect().Status(http.StatusOK)
+	})
+})