the master's tiup-cluster display sees two Dashboard url

[WalterWj]

General Question

Before asking a question, make sure you have:

• Searched existing Stack Overflow questions.
• Googled your question.
• Searched open and closed GitHub issues
• Read the documentation:
  • TiUP Readme
  • TiUP Doc

Here we see that the master's tiup-cluster display sees two Dashboard url(s). It feels a little weird in here.

./bin/tiup-cluster display tidb-xx
Cluster type:       tidb
Cluster name:       tidb-xx
Cluster version: v7.1.5
Deploy user:        tidb
SSH type:           builtin
Dashboard URL: http://172.16.xxx.xx:2399/dashboard
Dashboard URLs: http://172.16.xxx.xx:2399/dashboard

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please assign linuxgit for approval. For more information see the Code Review Process. Please ensure that each of them provides their approval before proceeding.

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

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[sre-bot]

All committers have signed the CLA.

[ti-chi-bot[bot]]

Welcome @ben-wangz! It looks like this is your first PR to pingcap/tidb-operator 🎉