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Update Helm release linkerd-control-plane to v1.9.4

Renovate [bot] requested to merge renovate/linkerd-control-plane-1.x into master

This MR contains the following updates:

Package Update Change
linkerd-control-plane (source) patch 1.9.3 -> 1.9.4

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Release Notes

linkerd/linkerd2

v1.9.4

This edge is a release candidate for stable-2.11.0! It introduces a new linkerd viz auth command which shows metrics for server authorizations broken down by server for a given resource. It also shows the rate of unauthorized requests to each server. This is helpful for seeing a breakdown of which authorizations are being used and what proportion of traffic is being rejected.

It also fixes an issue in the proxy where HTTP load balancers could continue trying to establish connections to endpoints that were removed from service discovery. In addition it improves the proxy's error handling so that it can signal to an inbound proxy when its peers outbound connections should be torn down.

  • Changed destination watch updates from info to debug to reduce the amount of logs (thanks @​bartpeeters!)
  • Added the linkerd viz auth command which shows metrics for server authorizations broken down by server for a given resource
  • Fixed an issue where the policy controller's validating admission webhook attempted to validate ServerAuthorizations when it should only be validating Servers
  • Removed omitWebhookSideEffects setting now that we no longer support Kubernetes 1.12
  • Improved proxy error handling so that it can signal to its peers that their outbound connections should be torn down
  • Fixed an issue where after upgrades there would be a mismatch in certs used by the policy controller validator; the destination pod is now restarted similar to the injector
  • Fixed a field reference in the Helm template to properly refer to profileValidator.namespaceSelector
  • Updated policy CRD versions to v1beta1
  • Added support for stat's -o json option to Server resources
  • Fixed an issue in the proxy where HTTP load balancers could continue trying to establish connections to endpoints that were removed from service discovery
  • Added JSON output format to linkerd viz authz command

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