mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-22 13:00:19 +00:00
285 lines
10 KiB
Go
285 lines
10 KiB
Go
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package handlers
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
"unicode"
|
|
"unicode/utf8"
|
|
|
|
"go.opentelemetry.io/otel/attribute"
|
|
|
|
"k8s.io/apimachinery/pkg/api/errors"
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
metainternalversionscheme "k8s.io/apimachinery/pkg/apis/meta/internalversion/scheme"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/apis/meta/v1/validation"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/runtime/schema"
|
|
"k8s.io/apiserver/pkg/admission"
|
|
"k8s.io/apiserver/pkg/audit"
|
|
"k8s.io/apiserver/pkg/endpoints/handlers/fieldmanager"
|
|
"k8s.io/apiserver/pkg/endpoints/handlers/finisher"
|
|
requestmetrics "k8s.io/apiserver/pkg/endpoints/handlers/metrics"
|
|
"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
|
|
"k8s.io/apiserver/pkg/endpoints/request"
|
|
"k8s.io/apiserver/pkg/registry/rest"
|
|
"k8s.io/apiserver/pkg/util/dryrun"
|
|
"k8s.io/component-base/tracing"
|
|
"k8s.io/klog/v2"
|
|
)
|
|
|
|
var namespaceGVR = schema.GroupVersionResource{Group: "", Version: "v1", Resource: "namespaces"}
|
|
|
|
func createHandler(r rest.NamedCreater, scope *RequestScope, admit admission.Interface, includeName bool) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, req *http.Request) {
|
|
ctx := req.Context()
|
|
// For performance tracking purposes.
|
|
ctx, span := tracing.Start(ctx, "Create", traceFields(req)...)
|
|
defer span.End(500 * time.Millisecond)
|
|
|
|
namespace, name, err := scope.Namer.Name(req)
|
|
if err != nil {
|
|
if includeName {
|
|
// name was required, return
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
|
|
// otherwise attempt to look up the namespace
|
|
namespace, err = scope.Namer.Namespace(req)
|
|
if err != nil {
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
}
|
|
|
|
// enforce a timeout of at most requestTimeoutUpperBound (34s) or less if the user-provided
|
|
// timeout inside the parent context is lower than requestTimeoutUpperBound.
|
|
ctx, cancel := context.WithTimeout(ctx, requestTimeoutUpperBound)
|
|
defer cancel()
|
|
outputMediaType, _, err := negotiation.NegotiateOutputMediaType(req, scope.Serializer, scope)
|
|
if err != nil {
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
|
|
gv := scope.Kind.GroupVersion()
|
|
s, err := negotiation.NegotiateInputSerializer(req, false, scope.Serializer)
|
|
if err != nil {
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
|
|
body, err := limitedReadBodyWithRecordMetric(ctx, req, scope.MaxRequestBodyBytes, scope.Resource.GroupResource().String(), requestmetrics.Create)
|
|
if err != nil {
|
|
span.AddEvent("limitedReadBody failed", attribute.Int("len", len(body)), attribute.String("err", err.Error()))
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
span.AddEvent("limitedReadBody succeeded", attribute.Int("len", len(body)))
|
|
|
|
options := &metav1.CreateOptions{}
|
|
values := req.URL.Query()
|
|
if err := metainternalversionscheme.ParameterCodec.DecodeParameters(values, scope.MetaGroupVersion, options); err != nil {
|
|
err = errors.NewBadRequest(err.Error())
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
if errs := validation.ValidateCreateOptions(options); len(errs) > 0 {
|
|
err := errors.NewInvalid(schema.GroupKind{Group: metav1.GroupName, Kind: "CreateOptions"}, "", errs)
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
options.TypeMeta.SetGroupVersionKind(metav1.SchemeGroupVersion.WithKind("CreateOptions"))
|
|
|
|
defaultGVK := scope.Kind
|
|
original := r.New()
|
|
|
|
validationDirective := fieldValidation(options.FieldValidation)
|
|
decodeSerializer := s.Serializer
|
|
if validationDirective == metav1.FieldValidationWarn || validationDirective == metav1.FieldValidationStrict {
|
|
decodeSerializer = s.StrictSerializer
|
|
}
|
|
|
|
decoder := scope.Serializer.DecoderToVersion(decodeSerializer, scope.HubGroupVersion)
|
|
span.AddEvent("About to convert to expected version")
|
|
obj, gvk, err := decoder.Decode(body, &defaultGVK, original)
|
|
if err != nil {
|
|
strictError, isStrictError := runtime.AsStrictDecodingError(err)
|
|
switch {
|
|
case isStrictError && obj != nil && validationDirective == metav1.FieldValidationWarn:
|
|
addStrictDecodingWarnings(req.Context(), strictError.Errors())
|
|
case isStrictError && validationDirective == metav1.FieldValidationIgnore:
|
|
klog.Warningf("unexpected strict error when field validation is set to ignore")
|
|
fallthrough
|
|
default:
|
|
err = transformDecodeError(scope.Typer, err, original, gvk, body)
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
}
|
|
|
|
objGV := gvk.GroupVersion()
|
|
if !scope.AcceptsGroupVersion(objGV) {
|
|
err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%v)", objGV.String(), gv.String()))
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
span.AddEvent("Conversion done")
|
|
|
|
// On create, get name from new object if unset
|
|
if len(name) == 0 {
|
|
_, name, _ = scope.Namer.ObjectName(obj)
|
|
}
|
|
if len(namespace) == 0 && scope.Resource == namespaceGVR {
|
|
namespace = name
|
|
}
|
|
ctx = request.WithNamespace(ctx, namespace)
|
|
|
|
admit = admission.WithAudit(admit)
|
|
audit.LogRequestObject(req.Context(), obj, objGV, scope.Resource, scope.Subresource, scope.Serializer)
|
|
|
|
userInfo, _ := request.UserFrom(ctx)
|
|
|
|
if objectMeta, err := meta.Accessor(obj); err == nil {
|
|
preserveObjectMetaSystemFields := false
|
|
if c, ok := r.(rest.SubresourceObjectMetaPreserver); ok && len(scope.Subresource) > 0 {
|
|
preserveObjectMetaSystemFields = c.PreserveRequestObjectMetaSystemFieldsOnSubresourceCreate()
|
|
}
|
|
if !preserveObjectMetaSystemFields {
|
|
rest.WipeObjectMetaSystemFields(objectMeta)
|
|
}
|
|
|
|
// ensure namespace on the object is correct, or error if a conflicting namespace was set in the object
|
|
if err := rest.EnsureObjectNamespaceMatchesRequestNamespace(rest.ExpectedNamespaceForResource(namespace, scope.Resource), objectMeta); err != nil {
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
}
|
|
|
|
span.AddEvent("About to store object in database")
|
|
admissionAttributes := admission.NewAttributesRecord(obj, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Create, options, dryrun.IsDryRun(options.DryRun), userInfo)
|
|
requestFunc := func() (runtime.Object, error) {
|
|
return r.Create(
|
|
ctx,
|
|
name,
|
|
obj,
|
|
rest.AdmissionToValidateObjectFunc(admit, admissionAttributes, scope),
|
|
options,
|
|
)
|
|
}
|
|
// Dedup owner references before updating managed fields
|
|
dedupOwnerReferencesAndAddWarning(obj, req.Context(), false)
|
|
result, err := finisher.FinishRequest(ctx, func() (runtime.Object, error) {
|
|
if scope.FieldManager != nil {
|
|
liveObj, err := scope.Creater.New(scope.Kind)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create new object (Create for %v): %v", scope.Kind, err)
|
|
}
|
|
obj = scope.FieldManager.UpdateNoErrors(liveObj, obj, managerOrUserAgent(options.FieldManager, req.UserAgent()))
|
|
admit = fieldmanager.NewManagedFieldsValidatingAdmissionController(admit)
|
|
}
|
|
if mutatingAdmission, ok := admit.(admission.MutationInterface); ok && mutatingAdmission.Handles(admission.Create) {
|
|
if err := mutatingAdmission.Admit(ctx, admissionAttributes, scope); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
// Dedup owner references again after mutating admission happens
|
|
dedupOwnerReferencesAndAddWarning(obj, req.Context(), true)
|
|
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) {
|
|
if accessor, accessorErr := meta.Accessor(obj); accessorErr == nil {
|
|
accessor.SetManagedFields(nil)
|
|
result, err = requestFunc()
|
|
}
|
|
}
|
|
return result, err
|
|
})
|
|
if err != nil {
|
|
span.AddEvent("Write to database call failed", attribute.Int("len", len(body)), attribute.String("err", err.Error()))
|
|
scope.err(err, w, req)
|
|
return
|
|
}
|
|
span.AddEvent("Write to database call succeeded", attribute.Int("len", len(body)))
|
|
|
|
code := http.StatusCreated
|
|
status, ok := result.(*metav1.Status)
|
|
if ok && status.Code == 0 {
|
|
status.Code = int32(code)
|
|
}
|
|
|
|
span.AddEvent("About to write a response")
|
|
defer span.AddEvent("Writing http response done")
|
|
transformResponseObject(ctx, scope, req, w, code, outputMediaType, result)
|
|
}
|
|
}
|
|
|
|
// CreateNamedResource returns a function that will handle a resource creation with name.
|
|
func CreateNamedResource(r rest.NamedCreater, scope *RequestScope, admission admission.Interface) http.HandlerFunc {
|
|
return createHandler(r, scope, admission, true)
|
|
}
|
|
|
|
// CreateResource returns a function that will handle a resource creation.
|
|
func CreateResource(r rest.Creater, scope *RequestScope, admission admission.Interface) http.HandlerFunc {
|
|
return createHandler(&namedCreaterAdapter{r}, scope, admission, false)
|
|
}
|
|
|
|
type namedCreaterAdapter struct {
|
|
rest.Creater
|
|
}
|
|
|
|
func (c *namedCreaterAdapter) Create(ctx context.Context, name string, obj runtime.Object, createValidatingAdmission rest.ValidateObjectFunc, options *metav1.CreateOptions) (runtime.Object, error) {
|
|
return c.Creater.Create(ctx, obj, createValidatingAdmission, options)
|
|
}
|
|
|
|
// manager is assumed to be already a valid value, we need to make
|
|
// userAgent into a valid value too.
|
|
func managerOrUserAgent(manager, userAgent string) string {
|
|
if manager != "" {
|
|
return manager
|
|
}
|
|
return prefixFromUserAgent(userAgent)
|
|
}
|
|
|
|
// prefixFromUserAgent takes the characters preceding the first /, quote
|
|
// unprintable character and then trim what's beyond the
|
|
// FieldManagerMaxLength limit.
|
|
func prefixFromUserAgent(u string) string {
|
|
m := strings.Split(u, "/")[0]
|
|
buf := bytes.NewBuffer(nil)
|
|
for _, r := range m {
|
|
// Ignore non-printable characters
|
|
if !unicode.IsPrint(r) {
|
|
continue
|
|
}
|
|
// Only append if we have room for it
|
|
if buf.Len()+utf8.RuneLen(r) > validation.FieldManagerMaxLength {
|
|
break
|
|
}
|
|
buf.WriteRune(r)
|
|
}
|
|
return buf.String()
|
|
}
|