Set the PD role to Unknown when pd_tso_role value is null

[matchge-ca]

Signed-off-by: Hua Lu hua.lu@pingcap.com

What problem does this PR solve?

Issue Number: Close #5047

What is changed and how does it work?

Change the valueMaps definition for PD role panel to Unknown when pd_tso_role value is null,

Check List

Tests

• Manual test (add detailed scripts or steps below)
  • Apply the changes to grafana
  • Check the role value is Unknown when the pd_tso_role is null or during the metric loading time

Code changes

Side effects

Related changes

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HunDunDM
• lhy1024

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[ti-chi-bot]

@matchge-ca: Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[codecov]

Codecov Report

Merging #5233 (c776e28) into master (844f5ed) will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5233      +/-   ##
==========================================
+ Coverage   75.63%   75.70%   +0.06%     
==========================================
  Files         310      310              
  Lines       30708    30708              
==========================================
+ Hits        23226    23246      +20     
+ Misses       5485     5473      -12     
+ Partials     1997     1989       -8     

Flag	Coverage Δ
unittests	75.70% <ø> (+0.06%)	⬆️

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

Impacted Files	Coverage Δ
server/schedulers/shuffle_hot_region.go	55.55% <0.00%> (-10.11%)	⬇️
server/storage/kv/etcd_kv.go	79.71% <0.00%> (-5.80%)	⬇️
server/tso/tso.go	69.49% <0.00%> (-2.26%)	⬇️
server/schedule/operator_controller.go	85.77% <0.00%> (-0.81%)	⬇️
server/cluster/unsafe_recovery_controller.go	80.18% <0.00%> (-0.37%)	⬇️
server/tso/local_allocator.go	71.62% <0.00%> (ø)
server/cluster/cluster.go	83.91% <0.00%> (+0.09%)	⬆️
server/grpc_service.go	51.79% <0.00%> (+0.35%)	⬆️
server/handler.go	52.96% <0.00%> (+0.38%)	⬆️
server/server.go	74.27% <0.00%> (+0.39%)	⬆️
... and 11 more

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[HunDunDM]

/merge

[ti-chi-bot]

@HunDunDM: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

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

Commit hash: d6ed164