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refactor!: using multiple handers per route
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // Copyright 2020-2021 Clastix Labs | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package ingress | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| extensionsv1beta1 "k8s.io/api/extensions/v1beta1" | ||
| networkingv1 "k8s.io/api/networking/v1" | ||
| networkingv1beta1 "k8s.io/api/networking/v1beta1" | ||
| "k8s.io/apimachinery/pkg/fields" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/webhook/admission" | ||
|
|
||
| capsulev1alpha1 "github.com/clastix/capsule/api/v1alpha1" | ||
| ) | ||
|
|
||
| func tenantFromIngress(ctx context.Context, c client.Client, ingress Ingress) (*capsulev1alpha1.Tenant, error) { | ||
| tenantList := &capsulev1alpha1.TenantList{} | ||
| if err := c.List(ctx, tenantList, client.MatchingFieldsSelector{ | ||
| Selector: fields.OneTermEqualSelector(".status.namespaces", ingress.Namespace()), | ||
| }); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if len(tenantList.Items) == 0 { | ||
| return nil, nil | ||
| } | ||
|
|
||
| return &tenantList.Items[0], nil | ||
| } | ||
|
|
||
| func ingressFromRequest(req admission.Request, decoder *admission.Decoder) (ingress Ingress, err error) { | ||
| switch req.Kind.Group { | ||
| case "networking.k8s.io": | ||
| if req.Kind.Version == "v1" { | ||
| ingressObj := &networkingv1.Ingress{} | ||
| if err = decoder.Decode(req, ingressObj); err != nil { | ||
| return | ||
| } | ||
| ingress = NetworkingV1{Ingress: ingressObj} | ||
| break | ||
| } | ||
| ingressObj := &networkingv1beta1.Ingress{} | ||
| if err = decoder.Decode(req, ingressObj); err != nil { | ||
| return | ||
| } | ||
| ingress = NetworkingV1Beta1{Ingress: ingressObj} | ||
| case "extensions": | ||
| ingressObj := &extensionsv1beta1.Ingress{} | ||
| if err = decoder.Decode(req, ingressObj); err != nil { | ||
| return | ||
| } | ||
| ingress = Extension{Ingress: ingressObj} | ||
| default: | ||
| err = fmt.Errorf("cannot recognize type %s", req.Kind.Group) | ||
| } | ||
| return | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| // Copyright 2020-2021 Clastix Labs | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package ingress | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/pkg/errors" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/client-go/tools/record" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/webhook/admission" | ||
|
|
||
| "github.com/clastix/capsule/api/v1alpha1" | ||
| "github.com/clastix/capsule/pkg/configuration" | ||
| capsulewebhook "github.com/clastix/capsule/pkg/webhook" | ||
| "github.com/clastix/capsule/pkg/webhook/utils" | ||
| ) | ||
|
|
||
| type class struct { | ||
| configuration configuration.Configuration | ||
| } | ||
|
|
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| func Class(configuration configuration.Configuration) capsulewebhook.Handler { | ||
| return &class{configuration: configuration} | ||
| } | ||
|
|
||
| func (r *class) OnCreate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func { | ||
| return func(ctx context.Context, req admission.Request) *admission.Response { | ||
| ingress, err := ingressFromRequest(req, decoder) | ||
| if err != nil { | ||
| return utils.ErroredResponse(err) | ||
| } | ||
|
|
||
| var tenant *v1alpha1.Tenant | ||
|
|
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| tenant, err = tenantFromIngress(ctx, client, ingress) | ||
| if err != nil { | ||
| return utils.ErroredResponse(err) | ||
| } | ||
|
|
||
| if tenant == nil { | ||
| return nil | ||
| } | ||
|
|
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| if err = r.validateClass(*tenant, ingress.IngressClass()); err == nil { | ||
| return nil | ||
| } | ||
|
|
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| var forbiddenErr *ingressClassForbidden | ||
|
|
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| if errors.As(err, &forbiddenErr) { | ||
| recorder.Eventf(tenant, corev1.EventTypeWarning, "IngressClassForbidden", "Ingress %s/%s class is forbidden", ingress.Namespace(), ingress.Name()) | ||
| } | ||
|
|
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| var invalidErr *ingressClassNotValid | ||
|
|
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| if errors.As(err, &invalidErr) { | ||
| recorder.Eventf(tenant, corev1.EventTypeWarning, "IngressClassNotValid", "Ingress %s/%s class is invalid", ingress.Namespace(), ingress.Name()) | ||
| } | ||
|
|
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| response := admission.Denied(err.Error()) | ||
|
|
||
| return &response | ||
| } | ||
| } | ||
|
|
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| func (r *class) OnUpdate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func { | ||
| return func(ctx context.Context, req admission.Request) *admission.Response { | ||
| ingress, err := ingressFromRequest(req, decoder) | ||
| if err != nil { | ||
| return utils.ErroredResponse(err) | ||
| } | ||
|
|
||
| var tenant *v1alpha1.Tenant | ||
|
|
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| tenant, err = tenantFromIngress(ctx, client, ingress) | ||
| if err != nil { | ||
| return utils.ErroredResponse(err) | ||
| } | ||
|
|
||
| if tenant == nil { | ||
| return nil | ||
| } | ||
|
|
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| err = r.validateClass(*tenant, ingress.IngressClass()) | ||
|
|
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| var forbiddenErr *ingressClassForbidden | ||
|
|
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| if errors.As(err, &forbiddenErr) { | ||
| recorder.Eventf(tenant, corev1.EventTypeWarning, "IngressClassForbidden", "Ingress %s/%s class is forbidden", ingress.Namespace(), ingress.Name()) | ||
| } | ||
|
|
||
| var invalidErr *ingressClassNotValid | ||
|
|
||
| if errors.As(err, &invalidErr) { | ||
| recorder.Eventf(tenant, corev1.EventTypeWarning, "IngressClassNotValid", "Ingress %s/%s class is invalid", ingress.Namespace(), ingress.Name()) | ||
| } | ||
|
|
||
| response := admission.Denied(err.Error()) | ||
|
|
||
| return &response | ||
| } | ||
| } | ||
|
|
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| func (r *class) OnDelete(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func { | ||
| return func(ctx context.Context, req admission.Request) *admission.Response { | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| func (r *class) validateClass(tenant v1alpha1.Tenant, ingressClass *string) error { | ||
| if tenant.Spec.IngressClasses == nil { | ||
| return nil | ||
| } | ||
|
|
||
| if ingressClass == nil { | ||
| return NewIngressClassNotValid(*tenant.Spec.IngressClasses) | ||
| } | ||
|
|
||
| var valid, matched bool | ||
|
|
||
| if len(tenant.Spec.IngressClasses.Exact) > 0 { | ||
| valid = tenant.Spec.IngressClasses.ExactMatch(*ingressClass) | ||
| } | ||
| matched = tenant.Spec.IngressClasses.RegexMatch(*ingressClass) | ||
|
|
||
| if !valid && !matched { | ||
| return NewIngressClassForbidden(*ingressClass, *tenant.Spec.IngressClasses) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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