Add e2e test for configmap change and reload

test/e2e/settings/configmap_change.go

@@ -0,0 +1,91 @@
+/*
+Copyright 2018 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 (
+	"regexp"
+	"strings"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.IngressNginxDescribe("Configmap change", func() {
+	f := framework.NewDefaultFramework("configmap-change")
+
+	BeforeEach(func() {
+		err := f.NewEchoDeployment()
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	AfterEach(func() {
+	})
+
+	It("should reload after an update in the configuration", func() {
+		host := "configmap-change"
+
+		ing, err := f.EnsureIngress(framework.NewSingleIngress(host, "/", host, f.IngressController.Namespace, "http-svc", 80, nil))
+		Expect(err).NotTo(HaveOccurred())
+		Expect(ing).NotTo(BeNil())
+
+		wlKey := "whitelist-source-range"
+		wlValue := "1.1.1.1"
+
+		By("adding a whitelist-source-range")
+
+		err = f.UpdateNginxConfigMapData(wlKey, wlValue)
+		Expect(err).NotTo(HaveOccurred())
+
+		checksumRegex := regexp.MustCompile("Configuration checksum:\\s+(\\d+)")
+		checksum := ""
+
+		err = f.WaitForNginxConfiguration(
+			func(cfg string) bool {
+				// before returning, extract the current checksum
+				match := checksumRegex.FindStringSubmatch(cfg)
+				if len(match) > 0 {
+					checksum = match[1]
+				}
+
+				return strings.Contains(cfg, "geo $the_real_ip $deny_") &&
+					strings.Contains(cfg, "1.1.1.1 0")
+			})
+		Expect(err).NotTo(HaveOccurred())
+		Expect(checksum).NotTo(BeEmpty())
+
+		By("changing error-log-level")
+
+		err = f.UpdateNginxConfigMapData("error-log-level", "debug")
+		Expect(err).NotTo(HaveOccurred())
+
+		newChecksum := ""
+		err = f.WaitForNginxConfiguration(
+			func(cfg string) bool {
+				match := checksumRegex.FindStringSubmatch(cfg)
+				if len(match) > 0 {
+					newChecksum = match[1]
+				}
+
+				return strings.ContainsAny(cfg, "error_log  /var/log/nginx/error.log debug;")
+			})
+		Expect(err).NotTo(HaveOccurred())
+
+		Expect(checksum).NotTo(BeEquivalentTo(newChecksum))
+	})
+})