Cannot use 'tiup cluster edit-config xxx' to modify the tidb slow query file path

[tiancaiamao]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?

• use tiup cluster edit-config xxx to edit the slow query file path
  server_configs:
  tidb:
  log.slow-query-file: /tidb-deploy/tidb-4000/log/testslow.log

• reload the cluster: tiup cluster reload xxx

• check the slow query file path, found the value is /tidb-deploy/tidb-4000/log/tidb_slow_query.log, it should be testslow.log

show config where name like '%slow%';

• remove the slow-log command line configure from /tidb-deploy/deploy/tidb-4000/scripts/run_tidb.sh and then restart the cluster the new slow log path is used. But if tiup reload, it's overwrite again.

2. What did you expect to see?

Using 'tiup cluster edit-config' to modify slow query file path should work.

3. What did you see instead?

It does not work.

4. What version of TiUP are you using (tiup --version)?

master

[seiya-annie]

/found customer