1.检查schedul-limit参数

show config where type='pd' and name like '%schedule-limit';
schedule.hot-region-schedule-limit 4
schedule.leader-schedule-limit 4
schedule.merge-schedule-limit 8
schedule.region-schedule-limit 2048
schedule.replica-schedule-limit 64

2.检查store leader数目

select store_id,leader_count,leader_weight,region_count,region_weight from INFORMATION_SCHEMA.TIKV_STORE_STATUS;

1 7 1 27 1
4 9 1 27 1
5 11 1 27 1

3.驱逐节点id=5的leader

#登录pd
tiup ctl:v6.1.0 pd -i
#增加驱逐
scheduler add evict-leader-scheduler 5

4.检查store leader数目

select store_id,leader_count,leader_weight,region_count,region_weight from INFORMATION_SCHEMA.TIKV_STORE_STATUS;
1 12 1 27 1
4 15 1 27 1
5 0 1 27 1

5.去除scheduler

实验完成去除scheduler

scheduler remove evict-leader-scheduler