Sche redirect6

[lhy1024]

What problem does this PR solve?

Issue Number: Close #xxx

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has the configuration change
• Has HTTP API interfaces changed (Don't forget to add the declarative for the new API)
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• PR to update pingcap/tiup:
• Need to cherry-pick to the release branch

Release note

None.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (sche-redirect5@a768778). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 763f36a differs from pull request most recent head dfb7cae. Consider uploading reports for the commit dfb7cae to get more accurate results

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@@                Coverage Diff                @@
##             sche-redirect5      #19   +/-   ##
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  Coverage                  ?   74.42%           
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  Files                     ?      442           
  Lines                     ?    47939           
  Branches                  ?        0           
=================================================
  Hits                      ?    35678           
  Misses                    ?     9092           
  Partials                  ?     3169           

Flag	Coverage Δ
unittests	74.42% <0.00%> (?)

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