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Allow resource backends in Ingress

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This commit is contained in:
Jordan Liggitt 2020-05-12 15:38:19 -04:00
parent 8f7b8105a1
commit 1758d17689
2 changed files with 9 additions and 182 deletions
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29
pkg/apis/networking/validation/validation.go
View File

@ -197,7 +197,6 @@ var ValidateIngressName = apimachineryvalidation.NameIsDNSSubdomain
// IngressValidationOptions cover beta to GA transitions for HTTP PathType
type IngressValidationOptions struct {
allowResourceBackend bool
}
// ValidateIngress validates Ingresses on create and update.
@ -211,10 +210,7 @@ func validateIngress(ingress *networking.Ingress, opts IngressValidationOptions,
func ValidateIngressCreate(ingress *networking.Ingress, requestGV schema.GroupVersion) field.ErrorList {
allErrs := field.ErrorList{}
var opts IngressValidationOptions
opts = IngressValidationOptions{
// TODO(cmluciano): Allow resource backend for 1.19.
allowResourceBackend: false,
}
opts = IngressValidationOptions{}
allErrs = append(allErrs, validateIngress(ingress, opts, requestGV)...)
annotationVal, annotationIsSet := ingress.Annotations[annotationIngressClass]
if annotationIsSet && ingress.Spec.IngressClassName != nil {
@ -228,9 +224,7 @@ func ValidateIngressCreate(ingress *networking.Ingress, requestGV schema.GroupVe
func ValidateIngressUpdate(ingress, oldIngress *networking.Ingress, requestGV schema.GroupVersion) field.ErrorList {
allErrs := apivalidation.ValidateObjectMetaUpdate(&ingress.ObjectMeta, &oldIngress.ObjectMeta, field.NewPath("metadata"))
var opts IngressValidationOptions
opts = IngressValidationOptions{
allowResourceBackend: resourceBackendPresent(oldIngress),
}
opts = IngressValidationOptions{}
allErrs = append(allErrs, validateIngress(ingress, opts, requestGV)...)
return allErrs
@ -383,8 +377,6 @@ func validateIngressBackend(backend *networking.IngressBackend, fldPath *field.P
switch {
case hasResourceBackend && hasServiceBackend:
return append(allErrs, field.Invalid(fldPath, "", "cannot set both resource and service backends"))
case hasResourceBackend && !opts.allowResourceBackend:
return append(allErrs, field.Forbidden(fldPath.Child("resource"), "not supported; only service backends are supported in this version"))
case hasResourceBackend:
allErrs = append(allErrs, validateIngressTypedLocalObjectReference(backend.Resource, fldPath.Child("resource"))...)
default:
@ -468,20 +460,3 @@ func validateIngressTypedLocalObjectReference(params *api.TypedLocalObjectRefere
return allErrs
}
func resourceBackendPresent(ingress *networking.Ingress) bool {
if ingress.Spec.Backend != nil && ingress.Spec.Backend.Resource != nil {
return true
}
for _, rule := range ingress.Spec.Rules {
if rule.HTTP == nil {
continue
}
for _, path := range rule.HTTP.Paths {
if path.Backend.Resource != nil {
return true
}
}
}
return false
}

162
pkg/apis/networking/validation/validation_test.go
View File

@ -1336,14 +1336,14 @@ func TestValidateIngressCreate(t *testing.T) {
},
expectedErrs: field.ErrorList{},
},
"Spec.Backend.Resource field not allowed on create": {
"Spec.Backend.Resource field allowed on create": {
tweakIngress: func(ingress *networking.Ingress) {
ingress.Spec.Backend = &networking.IngressBackend{
Resource: resourceBackend}
},
expectedErrs: field.ErrorList{field.Forbidden(field.NewPath("spec.backend.resource"), "not supported; only service backends are supported in this version")},
expectedErrs: field.ErrorList{},
},
"Paths.Backend.Resource field not allowed on create": {
"Paths.Backend.Resource field allowed on create": {
tweakIngress: func(ingress *networking.Ingress) {
ingress.Spec.Rules = []networking.IngressRule{{
Host: "foo.bar.com",
@ -1359,7 +1359,7 @@ func TestValidateIngressCreate(t *testing.T) {
},
}}
},
expectedErrs: field.ErrorList{field.Forbidden(field.NewPath("spec.rules[0].http.paths[0].backend.resource"), "not supported; only service backends are supported in this version")},
expectedErrs: field.ErrorList{},
},
}
@ -1543,13 +1543,13 @@ func TestValidateIngressUpdate(t *testing.T) {
},
expectedErrs: field.ErrorList{},
},
"new Backend.Resource not allowed on update": {
"new Backend.Resource allowed on update": {
tweakIngresses: func(newIngress, oldIngress *networking.Ingress) {
oldIngress.Spec.Backend = &defaultBackend
newIngress.Spec.Backend = &networking.IngressBackend{
Resource: resourceBackend}
},
expectedErrs: field.ErrorList{field.Forbidden(field.NewPath("spec.backend.resource"), "not supported; only service backends are supported in this version")},
expectedErrs: field.ErrorList{},
},
"old Backend.Resource allowed on update": {
tweakIngresses: func(newIngress, oldIngress *networking.Ingress) {
@ -1686,7 +1686,7 @@ func TestValidateIngressUpdate(t *testing.T) {
},
}}
},
expectedErrs: field.ErrorList{field.Forbidden(field.NewPath("spec.rules[0].http.paths[0].backend.resource"), "not supported; only service backends are supported in this version")},
expectedErrs: field.ErrorList{},
},
}
@ -2077,151 +2077,3 @@ func TestValidateIngressStatusUpdate(t *testing.T) {
}
}
}
func TestValidateResourceBackendPresent(t *testing.T) {
implementationPathType := networking.PathTypeImplementationSpecific
defaultBackend := networking.IngressBackend{
ServiceName: "default-backend",
ServicePort: intstr.FromInt(80),
}
resourceBackend := &api.TypedLocalObjectReference{
APIGroup: utilpointer.StringPtr("example.com"),
Kind: "foo",
Name: "bar",
}
baseIngress := networking.Ingress{
ObjectMeta: metav1.ObjectMeta{
Name: "foo",
Namespace: metav1.NamespaceDefault,
},
Spec: networking.IngressSpec{
Backend: &networking.IngressBackend{
ServiceName: "default-backend",
ServicePort: intstr.FromInt(80),
},
Rules: []networking.IngressRule{
{
Host: "foo.bar.com",
IngressRuleValue: networking.IngressRuleValue{
HTTP: &networking.HTTPIngressRuleValue{
Paths: []networking.HTTPIngressPath{
{
Path: "/foo",
PathType: &implementationPathType,
Backend: defaultBackend,
},
},
},
},
},
},
},
Status: networking.IngressStatus{
LoadBalancer: api.LoadBalancerStatus{
Ingress: []api.LoadBalancerIngress{
{IP: "127.0.0.1"},
},
},
},
}
testCases := map[string]struct {
groupVersion *schema.GroupVersion
tweakIngress func(ing *networking.Ingress)
expectResourceBackend bool
}{
"nil spec.Backend and no paths": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue.HTTP.Paths[0].Path = ""
},
expectResourceBackend: false,
},
"nil spec.Backend.Resource and no paths": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue.HTTP.Paths = []networking.HTTPIngressPath{}
},
expectResourceBackend: false,
},
"non-nil spec.Backend.Resource and no paths": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = &networking.IngressBackend{
Resource: resourceBackend,
}
ing.Spec.Rules[0].IngressRuleValue.HTTP.Paths[0].Path = ""
},
expectResourceBackend: true,
},
"nil spec.Backend, one rule with nil HTTP ": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue.HTTP = nil
},
expectResourceBackend: false,
},
"nil spec.Backend, one rule with non-nil HTTP, no paths": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue = networking.IngressRuleValue{
HTTP: &networking.HTTPIngressRuleValue{
Paths: []networking.HTTPIngressPath{},
},
}
},
expectResourceBackend: false,
},
"nil spec.Backend, one rule with non-nil HTTP, one path with nil Backend.Resource": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue = networking.IngressRuleValue{
HTTP: &networking.HTTPIngressRuleValue{
Paths: []networking.HTTPIngressPath{
{
Path: "/foo",
PathType: &implementationPathType,
Backend: networking.IngressBackend{
Resource: nil,
},
},
},
},
}
},
expectResourceBackend: false,
},
"nil spec.Backend, one rule with non-nil HTTP, one path with non-nil Backend.Resource": {
tweakIngress: func(ing *networking.Ingress) {
ing.Spec.Backend = nil
ing.Spec.Rules[0].IngressRuleValue = networking.IngressRuleValue{
HTTP: &networking.HTTPIngressRuleValue{
Paths: []networking.HTTPIngressPath{
{
Path: "/foo",
PathType: &implementationPathType,
Backend: networking.IngressBackend{
Resource: resourceBackend,
},
},
},
},
}
},
expectResourceBackend: true,
},
}
for name, testCase := range testCases {
t.Run(name, func(t *testing.T) {
ingress := baseIngress.DeepCopy()
testCase.tweakIngress(ingress)
gv := testCase.groupVersion
if gv == nil {
gv = &networkingv1.SchemeGroupVersion
}
isBackendAllowed := resourceBackendPresent(ingress)
if isBackendAllowed != testCase.expectResourceBackend {
t.Errorf("Expected resourceBackendPresent to return: %v, got: %v", testCase.expectResourceBackend, isBackendAllowed)
}
})
}
}