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annotation_validation.go
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annotation_validation.go
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/*
Copyright 2019 The Knative 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 autoscaling
import (
"fmt"
"math"
"strconv"
"time"
"knative.dev/pkg/apis"
)
func getIntGE0(m map[string]string, k string) (int64, *apis.FieldError) {
v, ok := m[k]
if !ok {
return 0, nil
}
i, err := strconv.ParseInt(v, 10, 32)
if err != nil || i < 0 {
return 0, apis.ErrOutOfBoundsValue(v, 1, math.MaxInt32, k)
}
return i, nil
}
func ValidateAnnotations(anns map[string]string) *apis.FieldError {
if len(anns) == 0 {
return nil
}
return validateMinMaxScale(anns).Also(validateFloats(anns)).Also(validateWindows(anns))
}
func validateFloats(annotations map[string]string) *apis.FieldError {
var errs *apis.FieldError
if v, ok := annotations[PanicWindowPercentageAnnotationKey]; ok {
if fv, err := strconv.ParseFloat(v, 64); err != nil {
errs = errs.Also(apis.ErrInvalidValue(v, PanicWindowPercentageAnnotationKey))
} else if fv < PanicWindowPercentageMin || fv > PanicWindowPercentageMax {
errs = apis.ErrOutOfBoundsValue(v, PanicWindowPercentageMin,
PanicWindowPercentageMax, PanicWindowPercentageAnnotationKey)
}
}
if v, ok := annotations[PanicThresholdPercentageAnnotationKey]; ok {
if fv, err := strconv.ParseFloat(v, 64); err != nil {
errs = errs.Also(apis.ErrInvalidValue(v, PanicThresholdPercentageAnnotationKey))
} else if fv < PanicThresholdPercentageMin || fv > PanicThresholdPercentageMax {
errs = errs.Also(apis.ErrOutOfBoundsValue(v, PanicThresholdPercentageMin, PanicThresholdPercentageMax,
PanicThresholdPercentageAnnotationKey))
}
}
if v, ok := annotations[TargetAnnotationKey]; ok {
if fv, err := strconv.ParseFloat(v, 64); err != nil || fv < TargetMin {
errs = errs.Also(apis.ErrInvalidValue(v, TargetAnnotationKey))
}
}
if v, ok := annotations[TargetUtilizationPercentageKey]; ok {
if fv, err := strconv.ParseFloat(v, 64); err != nil {
errs = errs.Also(apis.ErrInvalidValue(v, TargetUtilizationPercentageKey))
} else if fv < 1 || fv > 100 {
errs = errs.Also(apis.ErrOutOfBoundsValue(v, 1, 100, TargetUtilizationPercentageKey))
}
}
if v, ok := annotations[TargetBurstCapacityKey]; ok {
if fv, err := strconv.ParseFloat(v, 64); err != nil || fv < 0 && fv != -1 {
errs = errs.Also(apis.ErrInvalidValue(v, TargetBurstCapacityKey))
}
}
return errs
}
func validateWindows(annotations map[string]string) *apis.FieldError {
var errs *apis.FieldError
if v, ok := annotations[WindowAnnotationKey]; ok {
d, err := time.ParseDuration(v)
if err != nil {
errs = apis.ErrInvalidValue(v, WindowAnnotationKey)
} else if d < WindowMin || d > WindowMax {
errs = apis.ErrOutOfBoundsValue(v, WindowMin, WindowMax, WindowAnnotationKey)
}
}
return errs
}
func validateMinMaxScale(annotations map[string]string) *apis.FieldError {
var errs *apis.FieldError
min, err := getIntGE0(annotations, MinScaleAnnotationKey)
errs = errs.Also(err)
max, err := getIntGE0(annotations, MaxScaleAnnotationKey)
errs = errs.Also(err)
if max != 0 && max < min {
errs = errs.Also(&apis.FieldError{
Message: fmt.Sprintf("maxScale=%d is less than minScale=%d", max, min),
Paths: []string{MaxScaleAnnotationKey, MinScaleAnnotationKey},
})
}
return errs
}