Add Global Rate Limiting support

test/e2e/settings/globalratelimit.go

@@ -0,0 +1,96 @@
+/*
+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 settings
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/onsi/ginkgo"
+	"github.com/stretchr/testify/assert"
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.DescribeSetting("settings-global-rate-limit", func() {
+	f := framework.NewDefaultFramework("global-rate-limit")
+	host := "global-rate-limit"
+
+	ginkgo.BeforeEach(func() {
+		f.NewEchoDeployment()
+	})
+
+	ginkgo.It("generates correct NGINX configuration", func() {
+		annotations := make(map[string]string)
+		ing := framework.NewSingleIngress(host, "/", host, f.Namespace, framework.EchoService, 80, annotations)
+		f.EnsureIngress(ing)
+
+		ginkgo.By("generating correct defaults")
+
+		ngxCfg := ""
+		f.WaitForNginxConfiguration(func(cfg string) bool {
+			if strings.Contains(cfg, "global_throttle") {
+				ngxCfg = cfg
+				return true
+			}
+			return false
+		})
+
+		assert.Contains(ginkgo.GinkgoT(), ngxCfg, fmt.Sprintf(`global_throttle = { `+
+			`memcached = { host = "%v", port = %d, connect_timeout = %d, max_idle_timeout = %d, `+
+			`pool_size = %d, }, status_code = %d, }`,
+			"", 11211, 50, 10000, 50, 429))
+
+		f.HTTPTestClient().GET("/").WithHeader("Host", host).Expect().Status(http.StatusOK)
+
+		ginkgo.By("applying customizations")
+
+		memcachedHost := "memc.default.svc.cluster.local"
+		memcachedPort := 11211
+		memcachedConnectTimeout := 100
+		memcachedMaxIdleTimeout := 5000
+		memcachedPoolSize := 100
+		statusCode := 503
+
+		f.SetNginxConfigMapData(map[string]string{
+			"global-rate-limit-memcached-host":             memcachedHost,
+			"global-rate-limit-memcached-port":             strconv.Itoa(memcachedPort),
+			"global-rate-limit-memcached-connect-timeout":  strconv.Itoa(memcachedConnectTimeout),
+			"global-rate-limit-memcached-max-idle-timeout": strconv.Itoa(memcachedMaxIdleTimeout),
+			"global-rate-limit-memcached-pool-size":        strconv.Itoa(memcachedPoolSize),
+			"global-rate-limit-status-code":                strconv.Itoa(statusCode),
+		})
+
+		ngxCfg = ""
+		f.WaitForNginxConfiguration(func(cfg string) bool {
+			if strings.Contains(cfg, "global_throttle") {
+				ngxCfg = cfg
+				return true
+			}
+			return false
+		})
+
+		assert.Contains(ginkgo.GinkgoT(), ngxCfg, fmt.Sprintf(`global_throttle = { `+
+			`memcached = { host = "%v", port = %d, connect_timeout = %d, max_idle_timeout = %d, `+
+			`pool_size = %d, }, status_code = %d, }`,
+			memcachedHost, memcachedPort, memcachedConnectTimeout, memcachedMaxIdleTimeout,
+			memcachedPoolSize, statusCode))
+
+		f.HTTPTestClient().GET("/").WithHeader("Host", host).Expect().Status(http.StatusOK)
+	})
+})