Bug Report

/ready API was added to return whether pd follower is ready to became leader:

Right now it returns true even if regions are not loaded and it won't be ready to serve regions if promoted to the leader.

What did you do?

Restart a follower and issue /ready request right away while regions were still not loaded by the follower.

What did you expect to see?

Follower should always evaluate readiness locally w/o forwarding it to the leader. /ready should return false until regions are loaded.

What did you see instead?

Follower forwarded /ready request to leader and returned true.

What version of PD are you using (pd-server -V)?

Release Version: v9.0.0-beta.1.pre-99-gde4bc50f
Edition: Community
Git Commit Hash: de4bc50fa42d4d54aff2d76d66ded08f41f62492