When performing retries with a Client, allow the user to take some action in between each retry.

[AlexVulaj]

I have an application that performs retries of an AssumeRole call on an *sts.Client. I've configured my client with the following aws.Retryer:

config.WithRetryer(func() aws.Retryer {
	return retry.NewStandard(func(options *retry.StandardOptions) {
		options.Retryables = append(options.Retryables, retry.RetryableHTTPStatusCode{
			Codes: map[int]struct{}{401: {}, 403: {}, 404: {}},
		})
		options.MaxAttempts = 5
		options.MaxBackoff = 20 * time.Second
	})
}),

Is there any way to configure my Retryer such that I could print information to my console in between each retry? For example -

...
failed to assume role, retrying (attempt 2 of 5)
...
// Then eventually
...operation error STS: AssumeRole, exceeded maximum number of attempts, 5, ...

[AlexVulaj]

For anyone else curious, I ended up overriding the Backoff function with something like this:

...
config.WithRetryer(func() aws.Retryer {
	return retry.NewStandard(func(opts *retry.StandardOptions) {
		opts.Backoff = retry.BackoffDelayerFunc(func(attempt int, err error) (time.Duration, error) {
			fmt.Printf("Retry attempt %v of %v\n", attempt, opts.MaxAttempts)
			return 3 * time.Second, nil
		})
	})
})
...

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.