114 lines
3.1 KiB
Go
114 lines
3.1 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 features
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"sort"
|
||
|
|
"strconv"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
utilfeature "k8s.io/apiserver/pkg/util/feature"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
// SelfHosting is beta in v1.8
|
||
|
|
SelfHosting utilfeature.Feature = "SelfHosting"
|
||
|
|
|
||
|
|
// StoreCertsInSecrets is alpha in v1.8
|
||
|
|
StoreCertsInSecrets utilfeature.Feature = "StoreCertsInSecrets"
|
||
|
|
)
|
||
|
|
|
||
|
|
// FeatureList represents a list of feature gates
|
||
|
|
type FeatureList map[utilfeature.Feature]utilfeature.FeatureSpec
|
||
|
|
|
||
|
|
// Enabled indicates whether a feature name has been enabled
|
||
|
|
func Enabled(featureList map[string]bool, featureName utilfeature.Feature) bool {
|
||
|
|
return featureList[string(featureName)]
|
||
|
|
}
|
||
|
|
|
||
|
|
// Supports indicates whether a feature name is supported on the given
|
||
|
|
// feature set
|
||
|
|
func Supports(featureList FeatureList, featureName string) bool {
|
||
|
|
for k := range featureList {
|
||
|
|
if featureName == string(k) {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Keys returns a slice of feature names for a given feature set
|
||
|
|
func Keys(featureList FeatureList) []string {
|
||
|
|
var list []string
|
||
|
|
for k := range featureList {
|
||
|
|
list = append(list, string(k))
|
||
|
|
}
|
||
|
|
return list
|
||
|
|
}
|
||
|
|
|
||
|
|
// InitFeatureGates are the default feature gates for the init command
|
||
|
|
var InitFeatureGates = FeatureList{
|
||
|
|
SelfHosting: {Default: false, PreRelease: utilfeature.Alpha},
|
||
|
|
StoreCertsInSecrets: {Default: false, PreRelease: utilfeature.Alpha},
|
||
|
|
}
|
||
|
|
|
||
|
|
// KnownFeatures returns a slice of strings describing the FeatureList features.
|
||
|
|
func KnownFeatures(f *FeatureList) []string {
|
||
|
|
var known []string
|
||
|
|
for k, v := range *f {
|
||
|
|
pre := ""
|
||
|
|
if v.PreRelease != utilfeature.GA {
|
||
|
|
pre = fmt.Sprintf("%s - ", v.PreRelease)
|
||
|
|
}
|
||
|
|
known = append(known, fmt.Sprintf("%s=true|false (%sdefault=%t)", k, pre, v.Default))
|
||
|
|
}
|
||
|
|
sort.Strings(known)
|
||
|
|
return known
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewFeatureGate parse a string of the form "key1=value1,key2=value2,..." into a
|
||
|
|
// map[string]bool of known keys or returns an error.
|
||
|
|
func NewFeatureGate(f *FeatureList, value string) (map[string]bool, error) {
|
||
|
|
featureGate := map[string]bool{}
|
||
|
|
for _, s := range strings.Split(value, ",") {
|
||
|
|
if len(s) == 0 {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
arr := strings.SplitN(s, "=", 2)
|
||
|
|
if len(arr) != 2 {
|
||
|
|
return nil, fmt.Errorf("missing bool value for feature-gate key:%s", s)
|
||
|
|
}
|
||
|
|
|
||
|
|
k := strings.TrimSpace(arr[0])
|
||
|
|
v := strings.TrimSpace(arr[1])
|
||
|
|
|
||
|
|
if !Supports(*f, k) {
|
||
|
|
return nil, fmt.Errorf("unrecognized feature-gate key: %s", k)
|
||
|
|
}
|
||
|
|
|
||
|
|
boolValue, err := strconv.ParseBool(v)
|
||
|
|
if err != nil {
|
||
|
|
return nil, fmt.Errorf("invalid value %v for feature-gate key: %s, use true|false instead", v, k)
|
||
|
|
}
|
||
|
|
featureGate[k] = boolValue
|
||
|
|
}
|
||
|
|
|
||
|
|
return featureGate, nil
|
||
|
|
}
|