mirror of
https://github.com/apricote/hcloud-upload-image.git
synced 2026-01-13 21:31:03 +00:00
Julian Tölle
e490b9a7f3
In #68 I reduced the general limits for the back off, thinking that it would speed up the upload on average because it was retrying faster. But because it was retrying faster, the 10 available retries were used up before SSH became available. The new 100 retries match the 3 minutes of total timeout that the previous solution had, and should fix all issues. In addition, I discovered that my implementation in `hcloudimages/backoff.ExponentialBackoffWithLimit` has a bug where the calculated offset could overflow before the limit was applied, resulting in negative durations. I did not fix the issue because `hcloud-go` provides such a method natively nowadays. Instead, I marked the method as deprecated, to be removed in a later release.
41 lines
984 B
Go
41 lines
984 B
Go
// SPDX-License-Identifier: MPL-2.0
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// From https://github.com/hetznercloud/terraform-provider-hcloud/blob/v1.46.1/internal/control/retry.go
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// Copyright (c) Hetzner Cloud GmbH
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package control
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import (
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"context"
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"time"
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"github.com/hetznercloud/hcloud-go/v2/hcloud"
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"github.com/apricote/hcloud-upload-image/hcloudimages/contextlogger"
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)
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// Retry executes f at most maxTries times.
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func Retry(ctx context.Context, maxTries int, f func() error) error {
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logger := contextlogger.From(ctx)
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var err error
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backoffFunc := hcloud.ExponentialBackoffWithOpts(hcloud.ExponentialBackoffOpts{Multiplier: 2, Base: 200 * time.Millisecond, Cap: 2 * time.Second})
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for try := 0; try < maxTries; try++ {
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if ctx.Err() != nil {
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return ctx.Err()
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}
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err = f()
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if err != nil {
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sleep := backoffFunc(try)
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logger.DebugContext(ctx, "operation failed, waiting before trying again", "try", try, "backoff", sleep)
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time.Sleep(sleep)
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continue
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}
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return nil
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}
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return err
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}
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