/
retry.go
62 lines (51 loc) · 1.79 KB
/
retry.go
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/*
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.
*/
// This file from the cluster-api community (https://github.com/kubernetes-sigs/cluster-api) has been modified by Oracle.
package util
import (
"time"
"k8s.io/apimachinery/pkg/util/wait"
)
const (
backoffSteps = 10
backoffFactor = 1.25
backoffDuration = 5
backoffJitter = 1.0
)
// Retry retries a given function with exponential backoff.
func Retry(fn wait.ConditionFunc, initialBackoffSec int) error {
if initialBackoffSec <= 0 {
initialBackoffSec = backoffDuration
}
backoffConfig := wait.Backoff{
Steps: backoffSteps,
Factor: backoffFactor,
Duration: time.Duration(initialBackoffSec) * time.Second,
Jitter: backoffJitter,
}
retryErr := wait.ExponentialBackoff(backoffConfig, fn)
if retryErr != nil {
return retryErr
}
return nil
}
// Poll tries a condition func until it returns true, an error, or the timeout
// is reached.
func Poll(interval, timeout time.Duration, condition wait.ConditionFunc) error {
return wait.Poll(interval, timeout, condition)
}
// PollImmediate tries a condition func until it returns true, an error, or the timeout
// is reached.
func PollImmediate(interval, timeout time.Duration, condition wait.ConditionFunc) error {
return wait.PollImmediate(interval, timeout, condition)
}