/ready API should never be forwarded to the leader #9286
Description
Bug Report
/ready API was added to return whether pd follower is ready to became leader:
pd/server/apiv2/handlers/ready.go
Line 36 in 7c3b9a3
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