412cd70d3a
Adds the ability to create alternative backends. Alternative backends enable traffic shaping by sharing a single location but routing to different backends depending on the TrafficShapingPolicy defined by AlternativeBackends. When the list of upstreams and servers are retrieved, we then call mergeAlternativeBackends which iterates through the paths of every ingress and checks if the backend supporting the path is a AlternativeBackend. If so, we then iterate through the map of servers and find the real backend that the AlternativeBackend should fall under. Once found, the AlternativeBackend is embedded in the list of VirtualBackends for the real backend. If no matching real backend for a AlternativeBackend is found, then the AlternativeBackend is deleted as it cannot be backed by any server.
113 lines
3 KiB
Go
113 lines
3 KiB
Go
/*
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Copyright 2016 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 errors
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import (
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"fmt"
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"github.com/pkg/errors"
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)
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var (
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// ErrMissingAnnotations the ingress rule does not contain annotations
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// This is an error only when annotations are being parsed
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ErrMissingAnnotations = errors.New("ingress rule without annotations")
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// ErrInvalidAnnotationName the ingress rule does contains an invalid
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// annotation name
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ErrInvalidAnnotationName = errors.New("invalid annotation name")
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)
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// NewInvalidAnnotationConfiguration returns a new InvalidConfiguration error for use when
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// annotations are not correctly configured
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func NewInvalidAnnotationConfiguration(name string, reason string) error {
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return InvalidConfiguration{
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Name: fmt.Sprintf("the annotation %v does not contain a valid configuration: %v", name, reason),
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}
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}
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// NewInvalidAnnotationContent returns a new InvalidContent error
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func NewInvalidAnnotationContent(name string, val interface{}) error {
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return InvalidContent{
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Name: fmt.Sprintf("the annotation %v does not contain a valid value (%v)", name, val),
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}
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}
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// NewLocationDenied returns a new LocationDenied error
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func NewLocationDenied(reason string) error {
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return LocationDenied{
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Reason: errors.Errorf("Location denied, reason: %v", reason),
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}
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}
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// InvalidConfiguration Error
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type InvalidConfiguration struct {
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Name string
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}
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func (e InvalidConfiguration) Error() string {
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return e.Name
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}
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// InvalidContent error
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type InvalidContent struct {
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Name string
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}
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func (e InvalidContent) Error() string {
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return e.Name
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}
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// LocationDenied error
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type LocationDenied struct {
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Reason error
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}
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func (e LocationDenied) Error() string {
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return e.Reason.Error()
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}
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// IsLocationDenied checks if the err is an error which
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// indicates a location should return HTTP code 503
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func IsLocationDenied(e error) bool {
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_, ok := e.(LocationDenied)
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return ok
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}
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// IsMissingAnnotations checks if the err is an error which
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// indicates the ingress does not contain annotations
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func IsMissingAnnotations(e error) bool {
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return e == ErrMissingAnnotations
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}
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// IsInvalidContent checks if the err is an error which
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// indicates an annotations value is not valid
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func IsInvalidContent(e error) bool {
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_, ok := e.(InvalidContent)
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return ok
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}
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// New returns a new error
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func New(m string) error {
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return errors.New(m)
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}
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// Errorf formats according to a format specifier and returns the string
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// as a value that satisfies error.
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func Errorf(format string, args ...interface{}) error {
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return errors.Errorf(format, args...)
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}
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