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config.go
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config.go
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/*
Copyright 2015 The Kubernetes Authors All rights reserved.
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 config
import (
"io"
"time"
"github.com/scalingdata/gcfg"
)
const (
DefaultOfferTTL = 5 * time.Second // duration an offer is viable, prior to being expired
DefaultOfferLingerTTL = 120 * time.Second // duration an expired offer lingers in history
DefaultListenerDelay = 1 * time.Second // duration between offer listener notifications
DefaultUpdatesBacklog = 2048 // size of the pod updates channel
DefaultFrameworkIdRefreshInterval = 30 * time.Second // interval we update the frameworkId stored in etcd
DefaultInitialImplicitReconciliationDelay = 15 * time.Second // wait this amount of time after initial registration before attempting implicit reconciliation
DefaultExplicitReconciliationMaxBackoff = 2 * time.Minute // interval in between internal task status checks/updates
DefaultExplicitReconciliationAbortTimeout = 30 * time.Second // waiting period after attempting to cancel an ongoing reconciliation
DefaultInitialPodBackoff = 1 * time.Second
DefaultMaxPodBackoff = 60 * time.Second
DefaultHttpHandlerTimeout = 10 * time.Second
DefaultHttpBindInterval = 5 * time.Second
)
// Example scheduler configuration file:
//
// [scheduler]
// info-name = Kubernetes
// offer-ttl = 5s
// offer-linger-ttl = 2m
type ConfigWrapper struct {
Scheduler Config
}
type Config struct {
OfferTTL WrappedDuration `gcfg:"offer-ttl"`
OfferLingerTTL WrappedDuration `gcfg:"offer-linger-ttl"`
ListenerDelay WrappedDuration `gcfg:"listener-delay"`
UpdatesBacklog int `gcfg:"updates-backlog"`
FrameworkIdRefreshInterval WrappedDuration `gcfg:"framework-id-refresh-interval"`
InitialImplicitReconciliationDelay WrappedDuration `gcfg:"initial-implicit-reconciliation-delay"`
ExplicitReconciliationMaxBackoff WrappedDuration `gcfg:"explicit-reconciliation-max-backoff"`
ExplicitReconciliationAbortTimeout WrappedDuration `gcfg:"explicit-reconciliation-abort-timeout"`
InitialPodBackoff WrappedDuration `gcfg:"initial-pod-backoff"`
MaxPodBackoff WrappedDuration `gcfg:"max-pod-backoff"`
HttpHandlerTimeout WrappedDuration `gcfg:"http-handler-timeout"`
HttpBindInterval WrappedDuration `gcfg:"http-bind-interval"`
}
type WrappedDuration struct {
time.Duration
}
func (wd *WrappedDuration) UnmarshalText(data []byte) error {
d, err := time.ParseDuration(string(data))
if err == nil {
wd.Duration = d
}
return err
}
func (c *Config) SetDefaults() {
c.OfferTTL = WrappedDuration{DefaultOfferTTL}
c.OfferLingerTTL = WrappedDuration{DefaultOfferLingerTTL}
c.ListenerDelay = WrappedDuration{DefaultListenerDelay}
c.UpdatesBacklog = DefaultUpdatesBacklog
c.FrameworkIdRefreshInterval = WrappedDuration{DefaultFrameworkIdRefreshInterval}
c.InitialImplicitReconciliationDelay = WrappedDuration{DefaultInitialImplicitReconciliationDelay}
c.ExplicitReconciliationMaxBackoff = WrappedDuration{DefaultExplicitReconciliationMaxBackoff}
c.ExplicitReconciliationAbortTimeout = WrappedDuration{DefaultExplicitReconciliationAbortTimeout}
c.InitialPodBackoff = WrappedDuration{DefaultInitialPodBackoff}
c.MaxPodBackoff = WrappedDuration{DefaultMaxPodBackoff}
c.HttpHandlerTimeout = WrappedDuration{DefaultHttpHandlerTimeout}
c.HttpBindInterval = WrappedDuration{DefaultHttpBindInterval}
}
func CreateDefaultConfig() *Config {
c := &Config{}
c.SetDefaults()
return c
}
func (c *Config) Read(configReader io.Reader) error {
wrapper := &ConfigWrapper{Scheduler: *c}
if configReader != nil {
if err := gcfg.ReadInto(wrapper, configReader); err != nil {
return err
}
*c = wrapper.Scheduler
}
return nil
}