mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-28 07:50:19 +00:00
790 lines
29 KiB
Go
790 lines
29 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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"strings"
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"time"
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jsonpatch "github.com/evanphx/json-patch"
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"go.opentelemetry.io/otel/attribute"
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kjson "sigs.k8s.io/json"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/api/meta"
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metainternalversionscheme "k8s.io/apimachinery/pkg/apis/meta/internalversion/scheme"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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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/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/managedfields"
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"k8s.io/apimachinery/pkg/util/mergepatch"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/strategicpatch"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/apimachinery/pkg/util/yaml"
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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/authorization/authorizer"
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"k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager"
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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/registry/rest"
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"k8s.io/apiserver/pkg/util/dryrun"
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"k8s.io/component-base/tracing"
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)
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const (
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// maximum number of operations a single json patch may contain.
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maxJSONPatchOperations = 10000
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)
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// PatchResource returns a function that will handle a resource patch.
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func PatchResource(r rest.Patcher, scope *RequestScope, admit admission.Interface, patchTypes []string) 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, "Patch", traceFields(req)...)
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defer span.End(500 * time.Millisecond)
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// Do this first, otherwise name extraction can fail for unrecognized content types
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// TODO: handle this in negotiation
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contentType := req.Header.Get("Content-Type")
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// Remove "; charset=" if included in header.
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if idx := strings.Index(contentType, ";"); idx > 0 {
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contentType = contentType[:idx]
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}
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patchType := types.PatchType(contentType)
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// Ensure the patchType is one we support
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if !sets.NewString(patchTypes...).Has(contentType) {
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scope.err(negotiation.NewUnsupportedMediaTypeError(patchTypes), w, req)
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return
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}
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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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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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patchBytes, err := limitedReadBodyWithRecordMetric(ctx, req, scope.MaxRequestBodyBytes, scope.Resource.GroupResource().String(), requestmetrics.Patch)
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if err != nil {
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span.AddEvent("limitedReadBody failed", attribute.Int("len", len(patchBytes)), 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(patchBytes)))
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options := &metav1.PatchOptions{}
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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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if errs := validation.ValidatePatchOptions(options, patchType); len(errs) > 0 {
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err := errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "PatchOptions"}, "", 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("PatchOptions"))
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admit = admission.WithAudit(admit)
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audit.LogRequestPatch(req.Context(), patchBytes)
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span.AddEvent("Recorded the audit event")
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baseContentType := runtime.ContentTypeJSON
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if patchType == types.ApplyPatchType {
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baseContentType = runtime.ContentTypeYAML
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}
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s, ok := runtime.SerializerInfoForMediaType(scope.Serializer.SupportedMediaTypes(), baseContentType)
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if !ok {
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scope.err(fmt.Errorf("no serializer defined for %v", baseContentType), w, req)
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return
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}
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gv := scope.Kind.GroupVersion()
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validationDirective := fieldValidation(options.FieldValidation)
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decodeSerializer := s.Serializer
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if validationDirective == metav1.FieldValidationWarn || validationDirective == metav1.FieldValidationStrict {
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decodeSerializer = s.StrictSerializer
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}
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codec := runtime.NewCodec(
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scope.Serializer.EncoderForVersion(s.Serializer, gv),
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scope.Serializer.DecoderToVersion(decodeSerializer, scope.HubGroupVersion),
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)
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userInfo, _ := request.UserFrom(ctx)
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staticCreateAttributes := admission.NewAttributesRecord(
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nil,
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nil,
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scope.Kind,
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namespace,
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name,
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scope.Resource,
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scope.Subresource,
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admission.Create,
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patchToCreateOptions(options),
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dryrun.IsDryRun(options.DryRun),
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userInfo)
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staticUpdateAttributes := admission.NewAttributesRecord(
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nil,
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nil,
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scope.Kind,
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namespace,
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name,
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scope.Resource,
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scope.Subresource,
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admission.Update,
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patchToUpdateOptions(options),
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dryrun.IsDryRun(options.DryRun),
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userInfo,
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)
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if scope.FieldManager != nil {
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admit = fieldmanager.NewManagedFieldsValidatingAdmissionController(admit)
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}
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mutatingAdmission, _ := admit.(admission.MutationInterface)
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createAuthorizerAttributes := authorizer.AttributesRecord{
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User: userInfo,
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ResourceRequest: true,
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Path: req.URL.Path,
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Verb: "create",
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APIGroup: scope.Resource.Group,
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APIVersion: scope.Resource.Version,
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Resource: scope.Resource.Resource,
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Subresource: scope.Subresource,
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Namespace: namespace,
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Name: name,
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}
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p := patcher{
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namer: scope.Namer,
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creater: scope.Creater,
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defaulter: scope.Defaulter,
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typer: scope.Typer,
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unsafeConvertor: scope.UnsafeConvertor,
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kind: scope.Kind,
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resource: scope.Resource,
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subresource: scope.Subresource,
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dryRun: dryrun.IsDryRun(options.DryRun),
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validationDirective: validationDirective,
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objectInterfaces: scope,
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hubGroupVersion: scope.HubGroupVersion,
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createValidation: withAuthorization(rest.AdmissionToValidateObjectFunc(admit, staticCreateAttributes, scope), scope.Authorizer, createAuthorizerAttributes),
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updateValidation: rest.AdmissionToValidateObjectUpdateFunc(admit, staticUpdateAttributes, scope),
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admissionCheck: mutatingAdmission,
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codec: codec,
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options: options,
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restPatcher: r,
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name: name,
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patchType: patchType,
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patchBytes: patchBytes,
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userAgent: req.UserAgent(),
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}
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result, wasCreated, err := p.patchResource(ctx, 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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span.AddEvent("Object stored in database")
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status := http.StatusOK
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if wasCreated {
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status = http.StatusCreated
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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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type mutateObjectUpdateFunc func(ctx context.Context, obj, old runtime.Object) error
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// patcher breaks the process of patch application and retries into smaller
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// pieces of functionality.
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// TODO: Use builder pattern to construct this object?
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// TODO: As part of that effort, some aspects of PatchResource above could be
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// moved into this type.
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type patcher struct {
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// Pieces of RequestScope
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namer ScopeNamer
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creater runtime.ObjectCreater
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defaulter runtime.ObjectDefaulter
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typer runtime.ObjectTyper
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unsafeConvertor runtime.ObjectConvertor
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resource schema.GroupVersionResource
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kind schema.GroupVersionKind
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subresource string
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dryRun bool
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validationDirective string
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objectInterfaces admission.ObjectInterfaces
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hubGroupVersion schema.GroupVersion
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// Validation functions
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createValidation rest.ValidateObjectFunc
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updateValidation rest.ValidateObjectUpdateFunc
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admissionCheck admission.MutationInterface
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codec runtime.Codec
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options *metav1.PatchOptions
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// Operation information
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restPatcher rest.Patcher
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name string
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patchType types.PatchType
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patchBytes []byte
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userAgent string
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// Set at invocation-time (by applyPatch) and immutable thereafter
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namespace string
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updatedObjectInfo rest.UpdatedObjectInfo
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mechanism patchMechanism
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forceAllowCreate bool
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}
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type patchMechanism interface {
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applyPatchToCurrentObject(requextContext context.Context, currentObject runtime.Object) (runtime.Object, error)
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createNewObject(requestContext context.Context) (runtime.Object, error)
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}
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type jsonPatcher struct {
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*patcher
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fieldManager *managedfields.FieldManager
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}
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func (p *jsonPatcher) applyPatchToCurrentObject(requestContext context.Context, currentObject runtime.Object) (runtime.Object, error) {
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// Encode will convert & return a versioned object in JSON.
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currentObjJS, err := runtime.Encode(p.codec, currentObject)
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if err != nil {
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return nil, err
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}
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// Apply the patch.
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patchedObjJS, appliedStrictErrs, err := p.applyJSPatch(currentObjJS)
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if err != nil {
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return nil, err
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}
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// Construct the resulting typed, unversioned object.
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objToUpdate := p.restPatcher.New()
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if err := runtime.DecodeInto(p.codec, patchedObjJS, objToUpdate); err != nil {
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strictError, isStrictError := runtime.AsStrictDecodingError(err)
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switch {
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case !isStrictError:
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// disregard any appliedStrictErrs, because it's an incomplete
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// list of strict errors given that we don't know what fields were
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// unknown because DecodeInto failed. Non-strict errors trump in this case.
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return nil, errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
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field.Invalid(field.NewPath("patch"), string(patchedObjJS), err.Error()),
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})
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case p.validationDirective == metav1.FieldValidationWarn:
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addStrictDecodingWarnings(requestContext, append(appliedStrictErrs, strictError.Errors()...))
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default:
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strictDecodingError := runtime.NewStrictDecodingError(append(appliedStrictErrs, strictError.Errors()...))
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return nil, errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
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field.Invalid(field.NewPath("patch"), string(patchedObjJS), strictDecodingError.Error()),
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})
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}
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} else if len(appliedStrictErrs) > 0 {
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switch {
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case p.validationDirective == metav1.FieldValidationWarn:
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addStrictDecodingWarnings(requestContext, appliedStrictErrs)
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default:
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return nil, errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
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field.Invalid(field.NewPath("patch"), string(patchedObjJS), runtime.NewStrictDecodingError(appliedStrictErrs).Error()),
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})
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}
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}
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if p.fieldManager != nil {
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objToUpdate = p.fieldManager.UpdateNoErrors(currentObject, objToUpdate, managerOrUserAgent(p.options.FieldManager, p.userAgent))
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}
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return objToUpdate, nil
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}
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func (p *jsonPatcher) createNewObject(_ context.Context) (runtime.Object, error) {
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return nil, errors.NewNotFound(p.resource.GroupResource(), p.name)
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}
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type jsonPatchOp struct {
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Op string `json:"op"`
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Path string `json:"path"`
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From string `json:"from"`
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Value interface{} `json:"value"`
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}
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// applyJSPatch applies the patch. Input and output objects must both have
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// the external version, since that is what the patch must have been constructed against.
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func (p *jsonPatcher) applyJSPatch(versionedJS []byte) (patchedJS []byte, strictErrors []error, retErr error) {
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switch p.patchType {
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case types.JSONPatchType:
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if p.validationDirective == metav1.FieldValidationStrict || p.validationDirective == metav1.FieldValidationWarn {
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var v []jsonPatchOp
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var err error
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if strictErrors, err = kjson.UnmarshalStrict(p.patchBytes, &v); err != nil {
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return nil, nil, errors.NewBadRequest(fmt.Sprintf("error decoding patch: %v", err))
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}
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for i, e := range strictErrors {
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strictErrors[i] = fmt.Errorf("json patch %v", e)
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}
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}
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patchObj, err := jsonpatch.DecodePatch(p.patchBytes)
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if err != nil {
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return nil, nil, errors.NewBadRequest(err.Error())
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}
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if len(patchObj) > maxJSONPatchOperations {
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return nil, nil, errors.NewRequestEntityTooLargeError(
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fmt.Sprintf("The allowed maximum operations in a JSON patch is %d, got %d",
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maxJSONPatchOperations, len(patchObj)))
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}
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patchedJS, err := patchObj.Apply(versionedJS)
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if err != nil {
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return nil, nil, errors.NewGenericServerResponse(http.StatusUnprocessableEntity, "", schema.GroupResource{}, "", err.Error(), 0, false)
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}
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return patchedJS, strictErrors, nil
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case types.MergePatchType:
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if p.validationDirective == metav1.FieldValidationStrict || p.validationDirective == metav1.FieldValidationWarn {
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v := map[string]interface{}{}
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var err error
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strictErrors, err = kjson.UnmarshalStrict(p.patchBytes, &v)
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if err != nil {
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return nil, nil, errors.NewBadRequest(fmt.Sprintf("error decoding patch: %v", err))
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}
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}
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patchedJS, retErr = jsonpatch.MergePatch(versionedJS, p.patchBytes)
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if retErr == jsonpatch.ErrBadJSONPatch {
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return nil, nil, errors.NewBadRequest(retErr.Error())
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}
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return patchedJS, strictErrors, retErr
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default:
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// only here as a safety net - go-restful filters content-type
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return nil, nil, fmt.Errorf("unknown Content-Type header for patch: %v", p.patchType)
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}
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}
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type smpPatcher struct {
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*patcher
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// Schema
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schemaReferenceObj runtime.Object
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fieldManager *managedfields.FieldManager
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}
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func (p *smpPatcher) applyPatchToCurrentObject(requestContext context.Context, currentObject runtime.Object) (runtime.Object, error) {
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// Since the patch is applied on versioned objects, we need to convert the
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// current object to versioned representation first.
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currentVersionedObject, err := p.unsafeConvertor.ConvertToVersion(currentObject, p.kind.GroupVersion())
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if err != nil {
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return nil, err
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}
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versionedObjToUpdate, err := p.creater.New(p.kind)
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if err != nil {
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return nil, err
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}
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if err := strategicPatchObject(requestContext, p.defaulter, currentVersionedObject, p.patchBytes, versionedObjToUpdate, p.schemaReferenceObj, p.validationDirective); err != nil {
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return nil, err
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}
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// Convert the object back to the hub version
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newObj, err := p.unsafeConvertor.ConvertToVersion(versionedObjToUpdate, p.hubGroupVersion)
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if err != nil {
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return nil, err
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}
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if p.fieldManager != nil {
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newObj = p.fieldManager.UpdateNoErrors(currentObject, newObj, managerOrUserAgent(p.options.FieldManager, p.userAgent))
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}
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return newObj, nil
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}
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func (p *smpPatcher) createNewObject(_ context.Context) (runtime.Object, error) {
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return nil, errors.NewNotFound(p.resource.GroupResource(), p.name)
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}
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type applyPatcher struct {
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patch []byte
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options *metav1.PatchOptions
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creater runtime.ObjectCreater
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kind schema.GroupVersionKind
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fieldManager *managedfields.FieldManager
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userAgent string
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validationDirective string
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}
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func (p *applyPatcher) applyPatchToCurrentObject(requestContext context.Context, obj runtime.Object) (runtime.Object, error) {
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force := false
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if p.options.Force != nil {
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force = *p.options.Force
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}
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if p.fieldManager == nil {
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panic("FieldManager must be installed to run apply")
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}
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patchObj := &unstructured.Unstructured{Object: map[string]interface{}{}}
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if err := yaml.Unmarshal(p.patch, &patchObj.Object); err != nil {
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return nil, errors.NewBadRequest(fmt.Sprintf("error decoding YAML: %v", err))
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}
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obj, err := p.fieldManager.Apply(obj, patchObj, p.options.FieldManager, force)
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if err != nil {
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return obj, err
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}
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// TODO: spawn something to track deciding whether a fieldValidation=Strict
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// fatal error should return before an error from the apply operation
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if p.validationDirective == metav1.FieldValidationStrict || p.validationDirective == metav1.FieldValidationWarn {
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if err := yaml.UnmarshalStrict(p.patch, &map[string]interface{}{}); err != nil {
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if p.validationDirective == metav1.FieldValidationStrict {
|
|
return nil, errors.NewBadRequest(fmt.Sprintf("error strict decoding YAML: %v", err))
|
|
}
|
|
addStrictDecodingWarnings(requestContext, []error{err})
|
|
}
|
|
}
|
|
return obj, nil
|
|
}
|
|
|
|
func (p *applyPatcher) createNewObject(requestContext context.Context) (runtime.Object, error) {
|
|
obj, err := p.creater.New(p.kind)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create new object: %v", err)
|
|
}
|
|
return p.applyPatchToCurrentObject(requestContext, obj)
|
|
}
|
|
|
|
// strategicPatchObject applies a strategic merge patch of `patchBytes` to
|
|
// `originalObject` and stores the result in `objToUpdate`.
|
|
// It additionally returns the map[string]interface{} representation of the
|
|
// `originalObject` and `patchBytes`.
|
|
// NOTE: Both `originalObject` and `objToUpdate` are supposed to be versioned.
|
|
func strategicPatchObject(
|
|
requestContext context.Context,
|
|
defaulter runtime.ObjectDefaulter,
|
|
originalObject runtime.Object,
|
|
patchBytes []byte,
|
|
objToUpdate runtime.Object,
|
|
schemaReferenceObj runtime.Object,
|
|
validationDirective string,
|
|
) error {
|
|
originalObjMap, err := runtime.DefaultUnstructuredConverter.ToUnstructured(originalObject)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
patchMap := make(map[string]interface{})
|
|
var strictErrs []error
|
|
if validationDirective == metav1.FieldValidationWarn || validationDirective == metav1.FieldValidationStrict {
|
|
strictErrs, err = kjson.UnmarshalStrict(patchBytes, &patchMap)
|
|
if err != nil {
|
|
return errors.NewBadRequest(err.Error())
|
|
}
|
|
} else {
|
|
if err = kjson.UnmarshalCaseSensitivePreserveInts(patchBytes, &patchMap); err != nil {
|
|
return errors.NewBadRequest(err.Error())
|
|
}
|
|
}
|
|
|
|
if err := applyPatchToObject(requestContext, defaulter, originalObjMap, patchMap, objToUpdate, schemaReferenceObj, strictErrs, validationDirective); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// applyPatch is called every time GuaranteedUpdate asks for the updated object,
|
|
// and is given the currently persisted object as input.
|
|
// TODO: rename this function because the name implies it is related to applyPatcher
|
|
func (p *patcher) applyPatch(ctx context.Context, _, currentObject runtime.Object) (objToUpdate runtime.Object, patchErr error) {
|
|
// Make sure we actually have a persisted currentObject
|
|
tracing.SpanFromContext(ctx).AddEvent("About to apply patch")
|
|
currentObjectHasUID, err := hasUID(currentObject)
|
|
if err != nil {
|
|
return nil, err
|
|
} else if !currentObjectHasUID {
|
|
objToUpdate, patchErr = p.mechanism.createNewObject(ctx)
|
|
} else {
|
|
objToUpdate, patchErr = p.mechanism.applyPatchToCurrentObject(ctx, currentObject)
|
|
}
|
|
|
|
if patchErr != nil {
|
|
return nil, patchErr
|
|
}
|
|
|
|
objToUpdateHasUID, err := hasUID(objToUpdate)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if objToUpdateHasUID && !currentObjectHasUID {
|
|
accessor, err := meta.Accessor(objToUpdate)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return nil, errors.NewConflict(p.resource.GroupResource(), p.name, fmt.Errorf("uid mismatch: the provided object specified uid %s, and no existing object was found", accessor.GetUID()))
|
|
}
|
|
|
|
// if this object supports namespace info
|
|
if objectMeta, err := meta.Accessor(objToUpdate); err == nil {
|
|
// ensure namespace on the object is correct, or error if a conflicting namespace was set in the object
|
|
if err := rest.EnsureObjectNamespaceMatchesRequestNamespace(rest.ExpectedNamespaceForResource(p.namespace, p.resource), objectMeta); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if err := checkName(objToUpdate, p.name, p.namespace, p.namer); err != nil {
|
|
return nil, err
|
|
}
|
|
return objToUpdate, nil
|
|
}
|
|
|
|
func (p *patcher) admissionAttributes(ctx context.Context, updatedObject runtime.Object, currentObject runtime.Object, operation admission.Operation, operationOptions runtime.Object) admission.Attributes {
|
|
userInfo, _ := request.UserFrom(ctx)
|
|
return admission.NewAttributesRecord(updatedObject, currentObject, p.kind, p.namespace, p.name, p.resource, p.subresource, operation, operationOptions, p.dryRun, userInfo)
|
|
}
|
|
|
|
// applyAdmission is called every time GuaranteedUpdate asks for the updated object,
|
|
// and is given the currently persisted object and the patched object as input.
|
|
// TODO: rename this function because the name implies it is related to applyPatcher
|
|
func (p *patcher) applyAdmission(ctx context.Context, patchedObject runtime.Object, currentObject runtime.Object) (runtime.Object, error) {
|
|
tracing.SpanFromContext(ctx).AddEvent("About to check admission control")
|
|
var operation admission.Operation
|
|
var options runtime.Object
|
|
if hasUID, err := hasUID(currentObject); err != nil {
|
|
return nil, err
|
|
} else if !hasUID {
|
|
operation = admission.Create
|
|
currentObject = nil
|
|
options = patchToCreateOptions(p.options)
|
|
} else {
|
|
operation = admission.Update
|
|
options = patchToUpdateOptions(p.options)
|
|
}
|
|
if p.admissionCheck != nil && p.admissionCheck.Handles(operation) {
|
|
attributes := p.admissionAttributes(ctx, patchedObject, currentObject, operation, options)
|
|
return patchedObject, p.admissionCheck.Admit(ctx, attributes, p.objectInterfaces)
|
|
}
|
|
return patchedObject, nil
|
|
}
|
|
|
|
// patchResource divides PatchResource for easier unit testing
|
|
func (p *patcher) patchResource(ctx context.Context, scope *RequestScope) (runtime.Object, bool, error) {
|
|
p.namespace = request.NamespaceValue(ctx)
|
|
switch p.patchType {
|
|
case types.JSONPatchType, types.MergePatchType:
|
|
p.mechanism = &jsonPatcher{
|
|
patcher: p,
|
|
fieldManager: scope.FieldManager,
|
|
}
|
|
case types.StrategicMergePatchType:
|
|
schemaReferenceObj, err := p.unsafeConvertor.ConvertToVersion(p.restPatcher.New(), p.kind.GroupVersion())
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
p.mechanism = &smpPatcher{
|
|
patcher: p,
|
|
schemaReferenceObj: schemaReferenceObj,
|
|
fieldManager: scope.FieldManager,
|
|
}
|
|
// this case is unreachable if ServerSideApply is not enabled because we will have already rejected the content type
|
|
case types.ApplyPatchType:
|
|
p.mechanism = &applyPatcher{
|
|
fieldManager: scope.FieldManager,
|
|
patch: p.patchBytes,
|
|
options: p.options,
|
|
creater: p.creater,
|
|
kind: p.kind,
|
|
userAgent: p.userAgent,
|
|
validationDirective: p.validationDirective,
|
|
}
|
|
p.forceAllowCreate = true
|
|
default:
|
|
return nil, false, fmt.Errorf("%v: unimplemented patch type", p.patchType)
|
|
}
|
|
dedupOwnerReferencesTransformer := func(_ context.Context, obj, _ runtime.Object) (runtime.Object, error) {
|
|
// Dedup owner references after mutating admission happens
|
|
dedupOwnerReferencesAndAddWarning(obj, ctx, true)
|
|
return obj, nil
|
|
}
|
|
|
|
transformers := []rest.TransformFunc{p.applyPatch, p.applyAdmission, dedupOwnerReferencesTransformer}
|
|
if scope.FieldManager != nil {
|
|
transformers = append(transformers, fieldmanager.IgnoreManagedFieldsTimestampsTransformer)
|
|
}
|
|
|
|
wasCreated := false
|
|
p.updatedObjectInfo = rest.DefaultUpdatedObjectInfo(nil, transformers...)
|
|
requestFunc := func() (runtime.Object, error) {
|
|
// Pass in UpdateOptions to override UpdateStrategy.AllowUpdateOnCreate
|
|
options := patchToUpdateOptions(p.options)
|
|
updateObject, created, updateErr := p.restPatcher.Update(ctx, p.name, p.updatedObjectInfo, p.createValidation, p.updateValidation, p.forceAllowCreate, options)
|
|
wasCreated = created
|
|
return updateObject, updateErr
|
|
}
|
|
result, err := finisher.FinishRequest(ctx, func() (runtime.Object, error) {
|
|
|
|
result, err := requestFunc()
|
|
// If the object wasn't committed to storage because it's serialized size was too large,
|
|
// it is safe to remove managedFields (which can be large) and try again.
|
|
if isTooLargeError(err) && p.patchType != types.ApplyPatchType {
|
|
if _, accessorErr := meta.Accessor(p.restPatcher.New()); accessorErr == nil {
|
|
p.updatedObjectInfo = rest.DefaultUpdatedObjectInfo(nil,
|
|
p.applyPatch,
|
|
p.applyAdmission,
|
|
dedupOwnerReferencesTransformer,
|
|
func(_ context.Context, obj, _ runtime.Object) (runtime.Object, error) {
|
|
accessor, _ := meta.Accessor(obj)
|
|
accessor.SetManagedFields(nil)
|
|
return obj, nil
|
|
})
|
|
result, err = requestFunc()
|
|
}
|
|
}
|
|
return result, err
|
|
})
|
|
return result, wasCreated, err
|
|
}
|
|
|
|
// applyPatchToObject applies a strategic merge patch of <patchMap> to
|
|
// <originalMap> and stores the result in <objToUpdate>.
|
|
// NOTE: <objToUpdate> must be a versioned object.
|
|
func applyPatchToObject(
|
|
requestContext context.Context,
|
|
defaulter runtime.ObjectDefaulter,
|
|
originalMap map[string]interface{},
|
|
patchMap map[string]interface{},
|
|
objToUpdate runtime.Object,
|
|
schemaReferenceObj runtime.Object,
|
|
strictErrs []error,
|
|
validationDirective string,
|
|
) error {
|
|
patchedObjMap, err := strategicpatch.StrategicMergeMapPatch(originalMap, patchMap, schemaReferenceObj)
|
|
if err != nil {
|
|
return interpretStrategicMergePatchError(err)
|
|
}
|
|
|
|
// Rather than serialize the patched map to JSON, then decode it to an object, we go directly from a map to an object
|
|
converter := runtime.DefaultUnstructuredConverter
|
|
returnUnknownFields := validationDirective == metav1.FieldValidationWarn || validationDirective == metav1.FieldValidationStrict
|
|
if err := converter.FromUnstructuredWithValidation(patchedObjMap, objToUpdate, returnUnknownFields); err != nil {
|
|
strictError, isStrictError := runtime.AsStrictDecodingError(err)
|
|
switch {
|
|
case !isStrictError:
|
|
// disregard any sttrictErrs, because it's an incomplete
|
|
// list of strict errors given that we don't know what fields were
|
|
// unknown because StrategicMergeMapPatch failed.
|
|
// Non-strict errors trump in this case.
|
|
return errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
|
|
field.Invalid(field.NewPath("patch"), fmt.Sprintf("%+v", patchMap), err.Error()),
|
|
})
|
|
case validationDirective == metav1.FieldValidationWarn:
|
|
addStrictDecodingWarnings(requestContext, append(strictErrs, strictError.Errors()...))
|
|
default:
|
|
strictDecodingError := runtime.NewStrictDecodingError(append(strictErrs, strictError.Errors()...))
|
|
return errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
|
|
field.Invalid(field.NewPath("patch"), fmt.Sprintf("%+v", patchMap), strictDecodingError.Error()),
|
|
})
|
|
}
|
|
} else if len(strictErrs) > 0 {
|
|
switch {
|
|
case validationDirective == metav1.FieldValidationWarn:
|
|
addStrictDecodingWarnings(requestContext, strictErrs)
|
|
default:
|
|
return errors.NewInvalid(schema.GroupKind{}, "", field.ErrorList{
|
|
field.Invalid(field.NewPath("patch"), fmt.Sprintf("%+v", patchMap), runtime.NewStrictDecodingError(strictErrs).Error()),
|
|
})
|
|
}
|
|
}
|
|
|
|
// Decoding from JSON to a versioned object would apply defaults, so we do the same here
|
|
defaulter.Default(objToUpdate)
|
|
|
|
return nil
|
|
}
|
|
|
|
// interpretStrategicMergePatchError interprets the error type and returns an error with appropriate HTTP code.
|
|
func interpretStrategicMergePatchError(err error) error {
|
|
switch err {
|
|
case mergepatch.ErrBadJSONDoc, mergepatch.ErrBadPatchFormatForPrimitiveList, mergepatch.ErrBadPatchFormatForRetainKeys, mergepatch.ErrBadPatchFormatForSetElementOrderList, mergepatch.ErrUnsupportedStrategicMergePatchFormat:
|
|
return errors.NewBadRequest(err.Error())
|
|
case mergepatch.ErrNoListOfLists, mergepatch.ErrPatchContentNotMatchRetainKeys:
|
|
return errors.NewGenericServerResponse(http.StatusUnprocessableEntity, "", schema.GroupResource{}, "", err.Error(), 0, false)
|
|
default:
|
|
return err
|
|
}
|
|
}
|
|
|
|
// patchToUpdateOptions creates an UpdateOptions with the same field values as the provided PatchOptions.
|
|
func patchToUpdateOptions(po *metav1.PatchOptions) *metav1.UpdateOptions {
|
|
if po == nil {
|
|
return nil
|
|
}
|
|
uo := &metav1.UpdateOptions{
|
|
DryRun: po.DryRun,
|
|
FieldManager: po.FieldManager,
|
|
FieldValidation: po.FieldValidation,
|
|
}
|
|
uo.TypeMeta.SetGroupVersionKind(metav1.SchemeGroupVersion.WithKind("UpdateOptions"))
|
|
return uo
|
|
}
|
|
|
|
// patchToCreateOptions creates an CreateOptions with the same field values as the provided PatchOptions.
|
|
func patchToCreateOptions(po *metav1.PatchOptions) *metav1.CreateOptions {
|
|
if po == nil {
|
|
return nil
|
|
}
|
|
co := &metav1.CreateOptions{
|
|
DryRun: po.DryRun,
|
|
FieldManager: po.FieldManager,
|
|
FieldValidation: po.FieldValidation,
|
|
}
|
|
co.TypeMeta.SetGroupVersionKind(metav1.SchemeGroupVersion.WithKind("CreateOptions"))
|
|
return co
|
|
}
|