component/playground: rm the restriction that tikv num must be greater than 0

[lilinghai]

Signed-off-by: lilinghai lilinghai@pingcap.com

What problem does this PR solve?

In order to construct a pd with monitor quickly in pd test, we remove the restriction thas tikv num must be greater than 0.

What is changed and how it works?

Check List

Tests

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

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

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

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• nexustar

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[CLAassistant]

All committers have signed the CLA.

[nexustar]

please modify the error message together

[codecov-commenter]

Codecov Report

Base: 56.79% // Head: 51.41% // Decreases project coverage by -5.38% ⚠️

Coverage data is based on head (02f2ecd) compared to base (1ca7132).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2073      +/-   ##
==========================================
- Coverage   56.79%   51.41%   -5.38%     
==========================================
  Files         313      312       -1     
  Lines       33177    33166      -11     
==========================================
- Hits        18840    17050    -1790     
- Misses      12102    13888    +1786     
+ Partials     2235     2228       -7     

Flag	Coverage Δ
tiup	16.47% <ø> (ø)
unittest	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
components/playground/playground.go	50.94% <0.00%> (ø)
components/dm/ansible/worker.go	0.00% <0.00%> (-100.00%)	⬇️
pkg/meta/err.go	0.00% <0.00%> (-76.19%)	⬇️
pkg/cluster/api/error.go	0.00% <0.00%> (-75.00%)	⬇️
pkg/crypto/rand/passwd.go	0.00% <0.00%> (-75.00%)	⬇️
pkg/telemetry/node_info.go	0.00% <0.00%> (-70.73%)	⬇️
pkg/utils/error.go	0.00% <0.00%> (-64.29%)	⬇️
components/dm/ansible/import.go	0.00% <0.00%> (-61.28%)	⬇️
pkg/telemetry/scrub.go	12.31% <0.00%> (-60.00%)	⬇️
pkg/cluster/executor/local.go	0.00% <0.00%> (-59.38%)	⬇️
... and 43 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[lilinghai]

please modify the error message together

done

[nexustar]

please sign the CLA

[nexustar]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 9cbf943