9187b343e1
Prepatory work fpr removing cloud provider dependency from node controller running in Kube Controller Manager. Splitting the node controller into its two major pieces life-cycle and CIDR/IP management. Both pieces currently need the the cloud system to do their work. Removing lifecycles dependency on cloud will be fixed ina followup PR. Moved node scheduler code to live with node lifecycle controller. Got the IPAM/Lifecycle split completed. Still need to rename pieces. Made changes to the utils and tests so they would be in the appropriate package. Moved the node based ipam code to nodeipam. Made the relevant tests pass. Moved common node controller util code to nodeutil. Removed unneeded pod informer sync from node ipam controller. Fixed linter issues. Factored in feedback from @gmarek. Factored in feedback from @mtaufen. Undoing unneeded change.
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package ipam
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import (
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"time"
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)
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// Timeout manages the resync loop timing for a given node sync operation. The
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// timeout changes depending on whether or not there was an error reported for
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// the operation. Consecutive errors will result in exponential backoff to a
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// maxBackoff timeout.
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type Timeout struct {
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// Resync is the default timeout duration when there are no errors.
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Resync time.Duration
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// MaxBackoff is the maximum timeout when in a error backoff state.
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MaxBackoff time.Duration
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// InitialRetry is the initial retry interval when an error is reported.
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InitialRetry time.Duration
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// errs is the count of consecutive errors that have occurred.
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errs int
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// current is the current backoff timeout.
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current time.Duration
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}
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// Update the timeout with the current error state.
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func (b *Timeout) Update(ok bool) {
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if ok {
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b.errs = 0
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b.current = b.Resync
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return
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}
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b.errs++
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if b.errs == 1 {
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b.current = b.InitialRetry
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return
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}
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b.current *= 2
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if b.current >= b.MaxBackoff {
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b.current = b.MaxBackoff
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}
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}
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// Next returns the next operation timeout given the disposition of err.
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func (b *Timeout) Next() time.Duration {
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if b.errs == 0 {
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return b.Resync
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}
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return b.current
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}
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