mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-28 01:00:22 +00:00
295 lines
11 KiB
Go
295 lines
11 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"context"
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"fmt"
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"net/http"
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"time"
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"go.opentelemetry.io/otel/attribute"
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"k8s.io/apimachinery/pkg/api/errors"
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metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
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metainternalversionscheme "k8s.io/apimachinery/pkg/apis/meta/internalversion/scheme"
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metainternalversionvalidation "k8s.io/apimachinery/pkg/apis/meta/internalversion/validation"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/validation"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apiserver/pkg/admission"
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"k8s.io/apiserver/pkg/audit"
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"k8s.io/apiserver/pkg/endpoints/handlers/finisher"
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requestmetrics "k8s.io/apiserver/pkg/endpoints/handlers/metrics"
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"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
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"k8s.io/apiserver/pkg/endpoints/request"
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"k8s.io/apiserver/pkg/features"
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"k8s.io/apiserver/pkg/registry/rest"
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"k8s.io/apiserver/pkg/util/dryrun"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/component-base/tracing"
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)
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// DeleteResource returns a function that will handle a resource deletion
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// TODO admission here becomes solely validating admission
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func DeleteResource(r rest.GracefulDeleter, allowsOptions bool, scope *RequestScope, admit admission.Interface) http.HandlerFunc {
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return func(w http.ResponseWriter, req *http.Request) {
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ctx := req.Context()
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// For performance tracking purposes.
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ctx, span := tracing.Start(ctx, "Delete", traceFields(req)...)
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defer span.End(500 * time.Millisecond)
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namespace, name, err := scope.Namer.Name(req)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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// enforce a timeout of at most requestTimeoutUpperBound (34s) or less if the user-provided
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// timeout inside the parent context is lower than requestTimeoutUpperBound.
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ctx, cancel := context.WithTimeout(ctx, requestTimeoutUpperBound)
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defer cancel()
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ctx = request.WithNamespace(ctx, namespace)
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admit = admission.WithAudit(admit)
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outputMediaType, _, err := negotiation.NegotiateOutputMediaType(req, scope.Serializer, scope)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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options := &metav1.DeleteOptions{}
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if allowsOptions {
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body, err := limitedReadBodyWithRecordMetric(ctx, req, scope.MaxRequestBodyBytes, scope.Resource.GroupResource().String(), requestmetrics.Delete)
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if err != nil {
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span.AddEvent("limitedReadBody failed", attribute.Int("len", len(body)), attribute.String("err", err.Error()))
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scope.err(err, w, req)
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return
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}
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span.AddEvent("limitedReadBody succeeded", attribute.Int("len", len(body)))
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if len(body) > 0 {
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s, err := negotiation.NegotiateInputSerializer(req, false, metainternalversionscheme.Codecs)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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// For backwards compatibility, we need to allow existing clients to submit per group DeleteOptions
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// It is also allowed to pass a body with meta.k8s.io/v1.DeleteOptions
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defaultGVK := scope.MetaGroupVersion.WithKind("DeleteOptions")
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obj, gvk, err := metainternalversionscheme.Codecs.DecoderToVersion(s.Serializer, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, options)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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if obj != options {
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scope.err(fmt.Errorf("decoded object cannot be converted to DeleteOptions"), w, req)
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return
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}
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span.AddEvent("Decoded delete options")
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objGV := gvk.GroupVersion()
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audit.LogRequestObject(req.Context(), obj, objGV, scope.Resource, scope.Subresource, metainternalversionscheme.Codecs)
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span.AddEvent("Recorded the audit event")
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} else {
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if err := metainternalversionscheme.ParameterCodec.DecodeParameters(req.URL.Query(), scope.MetaGroupVersion, options); err != nil {
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err = errors.NewBadRequest(err.Error())
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scope.err(err, w, req)
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return
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}
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}
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}
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if errs := validation.ValidateDeleteOptions(options); len(errs) > 0 {
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err := errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "DeleteOptions"}, "", errs)
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scope.err(err, w, req)
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return
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}
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options.TypeMeta.SetGroupVersionKind(metav1.SchemeGroupVersion.WithKind("DeleteOptions"))
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span.AddEvent("About to delete object from database")
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wasDeleted := true
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userInfo, _ := request.UserFrom(ctx)
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staticAdmissionAttrs := admission.NewAttributesRecord(nil, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Delete, options, dryrun.IsDryRun(options.DryRun), userInfo)
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result, err := finisher.FinishRequest(ctx, func() (runtime.Object, error) {
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obj, deleted, err := r.Delete(ctx, name, rest.AdmissionToValidateObjectDeleteFunc(admit, staticAdmissionAttrs, scope), options)
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wasDeleted = deleted
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return obj, err
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})
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if err != nil {
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scope.err(err, w, req)
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return
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}
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span.AddEvent("Object deleted from database")
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status := http.StatusOK
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// Return http.StatusAccepted if the resource was not deleted immediately and
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// user requested cascading deletion by setting OrphanDependents=false.
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// Note: We want to do this always if resource was not deleted immediately, but
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// that will break existing clients.
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// Other cases where resource is not instantly deleted are: namespace deletion
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// and pod graceful deletion.
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//nolint:staticcheck // SA1019 backwards compatibility
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//nolint: staticcheck
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if !wasDeleted && options.OrphanDependents != nil && !*options.OrphanDependents {
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status = http.StatusAccepted
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}
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// if the rest.Deleter returns a nil object, fill out a status. Callers may return a valid
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// object with the response.
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if result == nil {
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result = &metav1.Status{
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Status: metav1.StatusSuccess,
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Code: int32(status),
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Details: &metav1.StatusDetails{
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Name: name,
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Kind: scope.Kind.Kind,
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},
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}
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}
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span.AddEvent("About to write a response")
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defer span.AddEvent("Writing http response done")
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transformResponseObject(ctx, scope, req, w, status, outputMediaType, result)
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}
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}
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// DeleteCollection returns a function that will handle a collection deletion
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func DeleteCollection(r rest.CollectionDeleter, checkBody bool, scope *RequestScope, admit admission.Interface) http.HandlerFunc {
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return func(w http.ResponseWriter, req *http.Request) {
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ctx := req.Context()
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ctx, span := tracing.Start(ctx, "Delete", traceFields(req)...)
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defer span.End(500 * time.Millisecond)
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namespace, err := scope.Namer.Namespace(req)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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// DELETECOLLECTION can be a lengthy operation,
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// we should not impose any 34s timeout here.
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// NOTE: This is similar to LIST which does not enforce a 34s timeout.
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ctx = request.WithNamespace(ctx, namespace)
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outputMediaType, _, err := negotiation.NegotiateOutputMediaType(req, scope.Serializer, scope)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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listOptions := metainternalversion.ListOptions{}
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if err := metainternalversionscheme.ParameterCodec.DecodeParameters(req.URL.Query(), scope.MetaGroupVersion, &listOptions); err != nil {
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err = errors.NewBadRequest(err.Error())
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scope.err(err, w, req)
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return
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}
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metainternalversion.SetListOptionsDefaults(&listOptions, utilfeature.DefaultFeatureGate.Enabled(features.WatchList))
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if errs := metainternalversionvalidation.ValidateListOptions(&listOptions, utilfeature.DefaultFeatureGate.Enabled(features.WatchList)); len(errs) > 0 {
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err := errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "ListOptions"}, "", errs)
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scope.err(err, w, req)
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return
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}
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// transform fields
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// TODO: DecodeParametersInto should do this.
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if listOptions.FieldSelector != nil {
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fn := func(label, value string) (newLabel, newValue string, err error) {
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return scope.Convertor.ConvertFieldLabel(scope.Kind, label, value)
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}
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if listOptions.FieldSelector, err = listOptions.FieldSelector.Transform(fn); err != nil {
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// TODO: allow bad request to set field causes based on query parameters
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err = errors.NewBadRequest(err.Error())
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scope.err(err, w, req)
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return
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}
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}
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options := &metav1.DeleteOptions{}
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if checkBody {
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body, err := limitedReadBodyWithRecordMetric(ctx, req, scope.MaxRequestBodyBytes, scope.Resource.GroupResource().String(), requestmetrics.DeleteCollection)
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if err != nil {
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span.AddEvent("limitedReadBody failed", attribute.Int("len", len(body)), attribute.String("err", err.Error()))
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scope.err(err, w, req)
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return
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}
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span.AddEvent("limitedReadBody succeeded", attribute.Int("len", len(body)))
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if len(body) > 0 {
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s, err := negotiation.NegotiateInputSerializer(req, false, metainternalversionscheme.Codecs)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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// For backwards compatibility, we need to allow existing clients to submit per group DeleteOptions
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// It is also allowed to pass a body with meta.k8s.io/v1.DeleteOptions
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defaultGVK := scope.MetaGroupVersion.WithKind("DeleteOptions")
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obj, gvk, err := metainternalversionscheme.Codecs.DecoderToVersion(s.Serializer, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, options)
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if err != nil {
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scope.err(err, w, req)
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return
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}
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if obj != options {
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scope.err(fmt.Errorf("decoded object cannot be converted to DeleteOptions"), w, req)
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return
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}
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objGV := gvk.GroupVersion()
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audit.LogRequestObject(req.Context(), obj, objGV, scope.Resource, scope.Subresource, metainternalversionscheme.Codecs)
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} else {
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if err := metainternalversionscheme.ParameterCodec.DecodeParameters(req.URL.Query(), scope.MetaGroupVersion, options); err != nil {
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err = errors.NewBadRequest(err.Error())
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scope.err(err, w, req)
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return
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}
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}
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}
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if errs := validation.ValidateDeleteOptions(options); len(errs) > 0 {
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err := errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "DeleteOptions"}, "", errs)
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scope.err(err, w, req)
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return
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}
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options.TypeMeta.SetGroupVersionKind(metav1.SchemeGroupVersion.WithKind("DeleteOptions"))
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admit = admission.WithAudit(admit)
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userInfo, _ := request.UserFrom(ctx)
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staticAdmissionAttrs := admission.NewAttributesRecord(nil, nil, scope.Kind, namespace, "", scope.Resource, scope.Subresource, admission.Delete, options, dryrun.IsDryRun(options.DryRun), userInfo)
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result, err := finisher.FinishRequest(ctx, func() (runtime.Object, error) {
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return r.DeleteCollection(ctx, rest.AdmissionToValidateObjectDeleteFunc(admit, staticAdmissionAttrs, scope), options, &listOptions)
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})
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if err != nil {
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scope.err(err, w, req)
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return
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}
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// if the rest.Deleter returns a nil object, fill out a status. Callers may return a valid
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// object with the response.
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if result == nil {
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result = &metav1.Status{
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Status: metav1.StatusSuccess,
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Code: http.StatusOK,
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Details: &metav1.StatusDetails{
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Kind: scope.Kind.Kind,
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},
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}
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}
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span.AddEvent("About to write a response")
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defer span.AddEvent("Writing http response done")
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transformResponseObject(ctx, scope, req, w, http.StatusOK, outputMediaType, result)
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}
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}
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