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config.go
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config.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 utils
import (
"fmt"
"os"
k8s "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
componentbaseconfig "k8s.io/component-base/config"
)
// MakeLeaderElectionConfig creates a *leaderelection.LeaderElectionConfig from a set of configurations
func MakeLeaderElectionConfig(cfg componentbaseconfig.LeaderElectionConfiguration, lockObjectNamespace string, lockObjectName string, client k8s.Interface, recorder record.EventRecorder) (*leaderelection.LeaderElectionConfig, error) {
hostname, err := os.Hostname()
if err != nil {
return nil, fmt.Errorf("unable to get hostname: %v", err)
}
lock, err := resourcelock.New(
cfg.ResourceLock,
lockObjectNamespace,
lockObjectName,
client.CoreV1(),
client.CoordinationV1(),
resourcelock.ResourceLockConfig{
Identity: hostname,
EventRecorder: recorder,
},
)
if err != nil {
return nil, fmt.Errorf("couldn't create resource lock: %v", err)
}
return &leaderelection.LeaderElectionConfig{
Lock: lock,
LeaseDuration: cfg.LeaseDuration.Duration,
RenewDeadline: cfg.RenewDeadline.Duration,
RetryPeriod: cfg.RetryPeriod.Duration,
}, nil
}