Linkerd - edge-23.1.1

edge-23.1.1

This edge release fixes a caching issue in the destination controller, converts
deprecated policy resources, and introduces several changes to how the proxy
works.

A bug in the destination controller that could potentially lead to stale pods
being considered in the load balancer has been fixed.

Several Linkerd extensions were still using the now deprecated
ServerAuthorization resource. These instances have now been converted to using
AuthorizationPolicy. Additionally, removed several policy resources that
authenticated probes, since probes are now authenticated by default.

As part of ongoing policy work, there are several changes with how the proxy
works. Routes are now lazily initialized so that service profile routes will
not show up in metrics until the route is used. Furthermore, the proxy’s
traffic splitting behavior has changed so that only available resources are
used, resulting in less failfast errors.

Finally, this edge release contains a number of fixes and improvements from our
contributors.

• Converted ServerAuthorization resources to AuthorizationPolicy resources
  in Linkerd extensions
• Removed policy resources bound to admin servers in extensions (previously
  these resources were used to authorize probes but now are authorized by
  default)
• Added a resources field in the linkerd-cni chart (thanks @jcogilvie!)
• Fixed an issue in the CLI where --identity-external-ca would set an
  incorrect field (thanks @anoxape!)
• Fixed an issue in the destination controller's cache that could result in
  stale endpoints when using EndpointSlice objects
• Added namespace to namespace-metadata resources in Helm (thanks @joebowbeer!)
• Added support for Pod Security Admission (Pod Security Policy resources are
  still supported but disabled by default)
• Changed routes to be initialized lazily. Service Profile routes will no
  longer show up in metrics until the route is used (default routes are always
  available when no Service Profile is defined for a service)
• Changed the proxy's behavior when traffic splitting so that only services
  that are not in failfast are used. This will enable the proxy to manage
  failover without external coordination
• Updated tokio (async runtime) in the proxy which should reduce CPU usage,
  especially for proxy's pod local (i.e in the same network namespace)
  communication
• Fixed an issue where linkerd viz tap would display wrong latency/duration
  value (thanks @olegy2008!)