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config.go
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config.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2017 Red Hat, Inc.
*
*/
package leaderelectionconfig
import (
"time"
"github.com/spf13/pflag"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/leaderelection/resourcelock"
)
const (
DefaultLeaseDuration = 15 * time.Second
DefaultRenewDeadline = 10 * time.Second
DefaultRetryPeriod = 2 * time.Second
DefaultEndpointName = "virt-controller"
)
func DefaultLeaderElectionConfiguration() Configuration {
return Configuration{
LeaseDuration: metav1.Duration{Duration: DefaultLeaseDuration},
RenewDeadline: metav1.Duration{Duration: DefaultRenewDeadline},
RetryPeriod: metav1.Duration{Duration: DefaultRetryPeriod},
ResourceLock: resourcelock.EndpointsLeasesResourceLock,
}
}
// BindFlags binds the common LeaderElectionCLIConfig flags
func BindFlags(l *Configuration) {
pflag.DurationVar(&l.LeaseDuration.Duration, "leader-elect-lease-duration", l.LeaseDuration.Duration, ""+
"The duration that non-leader candidates will wait after observing a leadership "+
"renewal until attempting to acquire leadership of a led but unrenewed leader "+
"slot. This is effectively the maximum duration that a leader can be stopped "+
"before it is replaced by another candidate. This is only applicable if leader "+
"election is enabled.")
pflag.DurationVar(&l.RenewDeadline.Duration, "leader-elect-renew-deadline", l.RenewDeadline.Duration, ""+
"The interval between attempts by the acting master to renew a leadership slot "+
"before it stops leading. This must be less than or equal to the lease duration. "+
"This is only applicable if leader election is enabled.")
pflag.DurationVar(&l.RetryPeriod.Duration, "leader-elect-retry-period", l.RetryPeriod.Duration, ""+
"The duration the clients should wait between attempting acquisition and renewal "+
"of a leadership. This is only applicable if leader election is enabled.")
pflag.StringVar(&l.ResourceLock, "leader-elect-resource-lock", l.ResourceLock, ""+
"The type of resource object that is used for locking during "+
"leader election. Supported options are `endpoints` (default) and `configmap`.")
}