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Signed-off-by: Marko Mudrinić <mudrinic.mare@gmail.com>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,63 @@ | ||
| /* | ||
| Copyright 2019 The KubeOne 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. | ||
| */ | ||
|
|
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| package task | ||
|
|
||
| import ( | ||
| "time" | ||
|
|
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| "github.com/kubermatic/kubeone/pkg/util" | ||
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| "k8s.io/apimachinery/pkg/util/wait" | ||
| ) | ||
|
|
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| // defaultRetryBackoff is backoff with with duration of 5 seconds and factor of 2.0 | ||
| func defaultRetryBackoff(retries int) wait.Backoff { | ||
| return wait.Backoff{ | ||
| Steps: retries, | ||
| Duration: 5 * time.Second, | ||
| Factor: 2.0, | ||
| } | ||
| } | ||
|
|
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| // Task is a runnable task | ||
| type Task struct { | ||
| Fn func(*util.Context) error | ||
| ErrMsg string | ||
| Retries int | ||
| } | ||
|
|
||
| // RunTask runs a task | ||
| func (t *Task) Run(ctx *util.Context) error { | ||
| if t.Retries == 0 { | ||
| t.Retries = 1 | ||
| } | ||
| backoff := defaultRetryBackoff(t.Retries) | ||
|
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||
| var lastError error | ||
| err := wait.ExponentialBackoff(backoff, func() (bool, error) { | ||
| lastError = t.Fn(ctx) | ||
| if lastError != nil { | ||
| ctx.Logger.Warn("Task failed, retrying…") | ||
| return false, nil | ||
| } | ||
| return true, nil | ||
| }) | ||
| if err == wait.ErrWaitTimeout { | ||
| err = lastError | ||
| } | ||
| return err | ||
| } |
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