Create custom annotation for satisfy "value"

docs/user-guide/nginx-configuration/annotations.md

@@ -64,6 +64,7 @@ You can add these Kubernetes annotations to specific Ingress objects to customiz
 |[nginx.ingress.kubernetes.io/proxy-redirect-to](#proxy-redirect)|string|
 |[nginx.ingress.kubernetes.io/enable-rewrite-log](#enable-rewrite-log)|"true" or "false"|
 |[nginx.ingress.kubernetes.io/rewrite-target](#rewrite)|URI|
+|[nginx.ingress.kubernetes.io/satisfy](#satisfy)|string|
 |[nginx.ingress.kubernetes.io/secure-verify-ca-secret](#secure-backends)|string|
 |[nginx.ingress.kubernetes.io/server-alias](#server-alias)|string|
 |[nginx.ingress.kubernetes.io/server-snippet](#server-snippet)|string|
@@ -760,3 +761,11 @@ When this annotation is set to `true`, the case insensitive regular expression [
 Additionally, if the [`rewrite-target` annotation](#rewrite) is used on any Ingress for a given host, then the case insensitive regular expression [location modifier](https://nginx.org/en/docs/http/ngx_http_core_module.html#location) will be enforced on ALL paths for a given host regardless of what Ingress they are defined on.  
 
 Please read about [ingress path matching](../ingress-path-matching.md) before using this modifier. 
+
+### Satisfy
+
+By default, a request would need to satisfy all authentication requirements in order to be allowed. By using this annotation, requests that satisfy either any or all authentication requirements are allowed, based on the configuration value.
+
+```yaml
+nginx.ingress.kubernetes.io/satisfy: "any"
+```

internal/ingress/annotations/annotations.go

@@ -49,6 +49,7 @@ import (
 	"k8s.io/ingress-nginx/internal/ingress/annotations/ratelimit"
 	"k8s.io/ingress-nginx/internal/ingress/annotations/redirect"
 	"k8s.io/ingress-nginx/internal/ingress/annotations/rewrite"
+	"k8s.io/ingress-nginx/internal/ingress/annotations/satisfy"
 	"k8s.io/ingress-nginx/internal/ingress/annotations/secureupstream"
 	"k8s.io/ingress-nginx/internal/ingress/annotations/serversnippet"
 	"k8s.io/ingress-nginx/internal/ingress/annotations/serviceupstream"
@@ -86,6 +87,7 @@ type Ingress struct {
 	RateLimit            ratelimit.Config
 	Redirect             redirect.Config
 	Rewrite              rewrite.Config
+	Satisfy              string
 	SecureUpstream       secureupstream.Config
 	ServerSnippet        string
 	ServiceUpstream      bool
@@ -129,6 +131,7 @@ func NewAnnotationExtractor(cfg resolver.Resolver) Extractor {
 			"RateLimit":            ratelimit.NewParser(cfg),
 			"Redirect":             redirect.NewParser(cfg),
 			"Rewrite":              rewrite.NewParser(cfg),
+			"Satisfy":              satisfy.NewParser(cfg),
 			"SecureUpstream":       secureupstream.NewParser(cfg),
 			"ServerSnippet":        serversnippet.NewParser(cfg),
 			"ServiceUpstream":      serviceupstream.NewParser(cfg),

internal/ingress/annotations/satisfy/main.go

@@ -0,0 +1,43 @@
+/*
+Copyright 2019 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 satisfy
+
+import (
+	extensions "k8s.io/api/extensions/v1beta1"
+
+	"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
+	"k8s.io/ingress-nginx/internal/ingress/resolver"
+)
+
+type satisfy struct {
+	r resolver.Resolver
+}
+
+// NewParser creates a new SATISFY annotation parser
+func NewParser(r resolver.Resolver) parser.IngressAnnotation {
+	return satisfy{r}
+}
+
+// Parse parses annotation contained in the ingress
+func (s satisfy) Parse(ing *extensions.Ingress) (interface{}, error) {
+	satisfy, err := parser.GetStringAnnotation("satisfy", ing)
+	if err != nil || satisfy != "any" {
+		satisfy = "all"
+	}
+
+	return satisfy, nil
+}

internal/ingress/annotations/satisfy/main_test.go

@@ -0,0 +1,95 @@
+/*
+Copyright 2019 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 satisfy
+
+import (
+	"testing"
+
+	api "k8s.io/api/core/v1"
+	extensions "k8s.io/api/extensions/v1beta1"
+	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"k8s.io/apimachinery/pkg/util/intstr"
+	"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
+	"k8s.io/ingress-nginx/internal/ingress/resolver"
+)
+
+func buildIngress() *extensions.Ingress {
+	defaultBackend := extensions.IngressBackend{
+		ServiceName: "default-backend",
+		ServicePort: intstr.FromInt(80),
+	}
+
+	return &extensions.Ingress{
+		ObjectMeta: meta_v1.ObjectMeta{
+			Name:      "fake",
+			Namespace: api.NamespaceDefault,
+		},
+		Spec: extensions.IngressSpec{
+			Backend: &extensions.IngressBackend{
+				ServiceName: "default-backend",
+				ServicePort: intstr.FromInt(80),
+			},
+			Rules: []extensions.IngressRule{
+				{
+					Host: "fake.host.com",
+					IngressRuleValue: extensions.IngressRuleValue{
+						HTTP: &extensions.HTTPIngressRuleValue{
+							Paths: []extensions.HTTPIngressPath{
+								{
+									Path:    "/fake",
+									Backend: defaultBackend,
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+func TestSatisfyParser(t *testing.T) {
+	ing := buildIngress()
+
+	data := map[string]string{
+		"any":     "any",
+		"all":     "all",
+		"invalid": "all",
+	}
+
+	annotations := map[string]string{}
+
+	for input, expected := range data {
+		annotations[parser.GetAnnotationWithPrefix("satisfy")] = input
+		ing.SetAnnotations(annotations)
+
+		satisfyt, err := NewParser(&resolver.Mock{}).Parse(ing)
+		if err != nil {
+			t.Errorf("error parsing annotations: %v", err)
+		}
+
+		val, ok := satisfyt.(string)
+		if !ok {
+			t.Errorf("expected a string type but return %t", satisfyt)
+		}
+
+		if val != expected {
+			t.Errorf("expected %v but returned %v", expected, val)
+		}
+	}
+}

internal/ingress/controller/controller.go

@@ -484,6 +484,7 @@ func (n *NGINXController) getBackendServers(ingresses []*ingress.Ingress) ([]*in
 						loc.BackendProtocol = anns.BackendProtocol
 						loc.CustomHTTPErrors = anns.CustomHTTPErrors
 						loc.ModSecurity = anns.ModSecurity
+						loc.Satisfy = anns.Satisfy
 
 						if loc.Redirect.FromToWWW {
 							server.RedirectFromToWWW = true
@@ -526,6 +527,7 @@ func (n *NGINXController) getBackendServers(ingresses []*ingress.Ingress) ([]*in
 						BackendProtocol:      anns.BackendProtocol,
 						CustomHTTPErrors:     anns.CustomHTTPErrors,
 						ModSecurity:          anns.ModSecurity,
+						Satisfy:              anns.Satisfy,
 					}
 
 					if loc.Redirect.FromToWWW {

internal/ingress/types.go

@@ -308,6 +308,8 @@ type Location struct {
 	// ModSecurity allows to enable and configure modsecurity
 	// +optional
 	ModSecurity modsecurity.Config `json:"modsecurity"`
+	// Satisfy dictates allow access if any or all is set
+	Satisfy string `json:"satisfy"`
 }
 
 // SSLPassthroughBackend describes a SSL upstream server configured

internal/ingress/types_equals.go

@@ -469,6 +469,10 @@ func (l1 *Location) Equal(l2 *Location) bool {
 		return false
 	}
 
+	if l1.Satisfy != l2.Satisfy {
+		return false
+	}
+
 	return true
 }
 

rootfs/etc/nginx/template/nginx.tmpl

@@ -1304,6 +1304,10 @@ stream {
             proxy_set_header       X-Service-Port     $service_port;
             {{ end }}
 
+            {{ if $location.Satisfy }}
+            satisfy {{ $location.Satisfy }};
+            {{ end }}
+
             {{/* if a location-specific error override is set, add the proxy_intercept here */}}
             {{ if $location.CustomHTTPErrors }}
             # Custom error pages per ingress

test/e2e/annotations/satisfy.go

@@ -0,0 +1,87 @@
+/*
+Copyright 2019 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"
+	"time"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	"github.com/parnurzeal/gorequest"
+	extensions "k8s.io/api/extensions/v1beta1"
+	"k8s.io/ingress-nginx/test/e2e/framework"
+)
+
+var _ = framework.IngressNginxDescribe("Annotations - SATISFY", func() {
+	f := framework.NewDefaultFramework("satisfy")
+
+	BeforeEach(func() {
+		f.NewEchoDeployment()
+	})
+
+	AfterEach(func() {
+	})
+
+	It("should configure satisfy directive correctly", func() {
+		host := "satisfy"
+		annotationKey := "nginx.ingress.kubernetes.io/satisfy"
+
+		annotations := map[string]string{
+			"any":     "any",
+			"all":     "all",
+			"invalid": "all",
+		}
+
+		results := map[string]string{
+			"any":     "satisfy any",
+			"all":     "satisfy all",
+			"invalid": "satisfy all",
+		}
+
+		initAnnotations := map[string]string{
+			annotationKey: "all",
+		}
+
+		ing := framework.NewSingleIngress(host, "/", host, f.IngressController.Namespace, "http-svc", 80, &initAnnotations)
+		f.EnsureIngress(ing)
+
+		for key, result := range results {
+			err := framework.UpdateIngress(f.KubeClientSet, f.IngressController.Namespace, host, func(ingress *extensions.Ingress) error {
+				ingress.ObjectMeta.Annotations[annotationKey] = annotations[key]
+				return nil
+			})
+			Expect(err).ToNot(HaveOccurred())
+
+			f.WaitForNginxServer(host,
+				func(server string) bool {
+					return Expect(server).Should(ContainSubstring(result))
+				})
+
+			resp, body, errs := gorequest.New().
+				Get(f.IngressController.HTTPURL).
+				Retry(10, 1*time.Second, http.StatusNotFound).
+				Set("Host", host).
+				End()
+
+			Expect(errs).Should(BeEmpty())
+			Expect(resp.StatusCode).Should(Equal(http.StatusOK))
+			Expect(body).Should(ContainSubstring(fmt.Sprintf("host=%v", host)))
+		}
+	})
+})