DNM: TiUP Cluster UI

[baurine]

What problem does this PR solve?

Supply a web UI of tiup cluster component for user to easily deploy and operate a cluster.

What is changed and how it works?

Add a web UI that includes both backend and frontend.

Compile it by:

$ make embed_cluster_ui
$ UI=1 make

Run it by:

$ bin/tiup-cluster --ui

Access http://ip:8080 in the browser.

Check List

Tests

• Manual test (add detailed scripts or steps below)

Code changes

• Has exported function/method change
• Has exported variable/fields change

Side effects

• Increased code complexity

Related changes

• Need to update the documentation

Release notes:

- Supply a web UI of tiup cluster component for user to easily deploy and operate a cluster.

[CLAassistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

Merging #706 into master will increase coverage by 2.36%.
The diff coverage is 20.56%.

@@            Coverage Diff             @@
##           master     #706      +/-   ##
==========================================
+ Coverage   51.47%   53.84%   +2.36%     
==========================================
  Files         249      263      +14     
  Lines       20676    21575     +899     
==========================================
+ Hits        10644    11617     +973     
+ Misses       8622     8393     -229     
- Partials     1410     1565     +155     

Flag	Coverage Δ
#cluster	46.09% <20.35%> (-0.75%)	⬇️
#dm	27.03% <39.54%> (+0.12%)	⬆️
#integrate	49.22% <20.56%> (-0.11%)	⬇️
#playground	22.96% <ø> (?)
#tiup	11.28% <0.00%> (-0.01%)	⬇️
#unittest	19.26% <0.91%> (-0.19%)	⬇️

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

Impacted Files	Coverage Δ
components/cluster/command/check.go	79.73% <0.00%> (ø)
components/cluster/web/uiserver/uiserver.go	0.00% <0.00%> (ø)
components/cluster/web/web.go	0.00% <0.00%> (ø)
pkg/cliutil/ssh.go	19.56% <9.09%> (-1.49%)	⬇️
components/cluster/command/root.go	44.02% <25.00%> (-0.87%)	⬇️
pkg/cluster/task/task.go	62.63% <31.25%> (-11.25%)	⬇️
pkg/cluster/manager.go	65.18% <44.66%> (-2.50%)	⬇️
pkg/cluster/task/step.go	78.57% <81.81%> (+0.16%)	⬆️
components/playground/instance/drainer.go	0.00% <0.00%> (ø)
... and 26 more

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[baurine]

Current Progress:

• Enable add/edit/remove machines and components
• Enable deploy a cluster and view its progress
• Enable show a deployed cluster topo and information
• Enable destroy a cluster

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@breeswish @lonng

[lonng]

@baurine Awesome

[ti-chi-bot]

@baurine: PR needs rebase.

Details

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 kubernetes/test-infra repository.

[AstroProfundis]

/hold

[baurine]

The upstream changes too much so will abandon this PR, and commit a new PR that base on the latest master branch.

[baurine]

Replace it with #1172