[branch/v9] Improve CertAuthorityWatcher (#10403) #12724
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rosstimothy
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espadolini
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May 18, 2022
* Improve CertAuthorityWatcher CertAuthorityWatcher and its usage are refactored to allow for all the following: - eliminate retransmission of the same CAs - reduce memory usage by having one local watcher per proxy - adds the ability to filter only the CAs that are desired - reduce the time required to send the first CAs watchCertAuthorities now compares all CAs it receives from the watcher with the previous CA of the same type and only sends to the remote site if they are not identical. This is to reduce unnecessary network traffic which can be problematic for a root cluster with a larger number of leafs. The CertAuthorityWatcher is refactored to leverage a fanout to emit events to any number of watchers, each subscription can be for a subset of the configured CA types. The proxy now has only one CertAuthorityWatcher that is passed around similarly to the LockWatcher. This reduces the memory usage for proxies, which prior to this has one local CAWatcher per remote site. updateCertAuthorities no longer waits on the utils.Retry it is provided with before starting to watch CAs. By doing this the proxy no longer has to wait ~8 minutes before it even starts to watch CAs. (cherry picked from commit 1ac0957)
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friendly ping @jakule |
jakule
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