Enhance SB polling intervals #4328
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With this change the retry-after header will be treated as an absolute value and not used for exponential backoff. Whenever the retry-after interval sent by the service broker is larger than the calculated interval using the base interval and exponential backoff, the retry-after interval will be used. When the CC calculated interval is larger the retry-after interval will be ignored.
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The maximum polling interval was hardcoded to 24h when set on the job. Though, the exponential backoff calculation did not take this into account. Now the maximum can be configured through `broker_client_maximum_async_poll_interval_seconds` and will be taken into account for all scenarios. Default is still 24h and the config is optional.
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Changes in cloud_controller_ng:
- Enhance SB polling intervals
PR: cloudfoundry/cloud_controller_ng#4328
Author: Sven Krieger <37476281+svkrieger@users.noreply.github.com>
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A short explanation of the proposed change:
Currently the retry-after header is used in the exponential backoff calculation. This PR makes it more intuitive by using the retry-after value as is, if it is larger than our own calculated polling interval. With that service owners can defer polling when they know that provisioning takes longer.
Introducing a configuration parameter
broker_client_max_async_poll_interval_secondsfor capping the polling interval. This helps preventing that polling intervals get too large. Default is still at 24h, which was hardcoded before.Links to any other associated PRs
cloudfoundry/capi-release#542
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