1 Star 0 Fork 0

zhuchance / kubernetes

Create your Gitee Account
Explore and code with more than 8 million developers,Free private repositories !:)
Sign up
Clone or Download
config.go 3.13 KB
Copy Edit Raw Blame History
Davanum Srinivas authored 2018-11-09 13:49 . Move from glog to klog
/*
Copyright 2016 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 imagepolicy contains an admission controller that configures a webhook to which policy
// decisions are delegated.
package imagepolicy
import (
"fmt"
"time"
"k8s.io/klog"
)
const (
defaultRetryBackoff = time.Duration(500) * time.Millisecond
minRetryBackoff = time.Duration(1)
maxRetryBackoff = time.Duration(5) * time.Minute
defaultAllowTTL = time.Duration(5) * time.Minute
defaultDenyTTL = time.Duration(30) * time.Second
minAllowTTL = time.Duration(1) * time.Second
maxAllowTTL = time.Duration(30) * time.Minute
minDenyTTL = time.Duration(1) * time.Second
maxDenyTTL = time.Duration(30) * time.Minute
useDefault = time.Duration(0) //sentinel for using default TTL
disableTTL = time.Duration(-1) //sentinel for disabling a TTL
)
// imagePolicyWebhookConfig holds config data for imagePolicyWebhook
type imagePolicyWebhookConfig struct {
KubeConfigFile string `json:"kubeConfigFile"`
AllowTTL time.Duration `json:"allowTTL"`
DenyTTL time.Duration `json:"denyTTL"`
RetryBackoff time.Duration `json:"retryBackoff"`
DefaultAllow bool `json:"defaultAllow"`
}
// AdmissionConfig holds config data for admission controllers
type AdmissionConfig struct {
ImagePolicyWebhook imagePolicyWebhookConfig `json:"imagePolicy"`
}
func normalizeWebhookConfig(config *imagePolicyWebhookConfig) (err error) {
config.RetryBackoff, err = normalizeConfigDuration("backoff", time.Millisecond, config.RetryBackoff, minRetryBackoff, maxRetryBackoff, defaultRetryBackoff)
if err != nil {
return err
}
config.AllowTTL, err = normalizeConfigDuration("allow cache", time.Second, config.AllowTTL, minAllowTTL, maxAllowTTL, defaultAllowTTL)
if err != nil {
return err
}
config.DenyTTL, err = normalizeConfigDuration("deny cache", time.Second, config.DenyTTL, minDenyTTL, maxDenyTTL, defaultDenyTTL)
if err != nil {
return err
}
return nil
}
func normalizeConfigDuration(name string, scale, value, min, max, defaultValue time.Duration) (time.Duration, error) {
// disable with -1 sentinel
if value == disableTTL {
klog.V(2).Infof("image policy webhook %s disabled", name)
return time.Duration(0), nil
}
// use default with 0 sentinel
if value == useDefault {
klog.V(2).Infof("image policy webhook %s using default value", name)
return defaultValue, nil
}
// convert to s; unmarshalling gives ns
value *= scale
// check value is within range
if value < min || value > max {
return value, fmt.Errorf("valid value is between %v and %v, got %v", min, max, value)
}
return value, nil
}

Comment ( 0 )

Sign in to post a comment

Go
1
https://gitee.com/meoom/kubernetes.git
git@gitee.com:meoom/kubernetes.git
meoom
kubernetes
kubernetes
v1.14.0

Search