Support tikv label check

[lucklove]

What problem does this PR solve?

Check if tikv's label is set correctly: fix #787

What is changed and how it works?

• apply check on deploy
• apply check on scale-out
• apply check on display
• add test

Check List

Tests

• Unit test
• Manual test

Deploy

If both TiKV labels and PD labels not set:

If TiVK labels are set but PD's not:

Display

If both TiKV labels and PD labels not set:

If TiVK labels are set but PD's not:

In this case, TiKV will refuse to start

[2020/09/22 18:30:07.660 +08:00] [FATAL] [server.rs:576] ["failed to start node: Grpc(RpcFailure(RpcStatus { status: 2-UNKNOWN, details: Some(\"key matching the label was not found in the PD, store label key: host \") }))"]

ScaleOut

The result is the same with deploy

Side effects

• Increased code complexity

Related changes

• Need to cherry-pick to the release branch

Release notes:

Automaticlly check if TiKV's label is set

[codecov-commenter]

Codecov Report

Merging #800 into master will increase coverage by 4.07%.
The diff coverage is 59.05%.

@@            Coverage Diff             @@
##           master     #800      +/-   ##
==========================================
+ Coverage   48.65%   52.73%   +4.07%     
==========================================
  Files         262      262              
  Lines       18850    18958     +108     
==========================================
+ Hits         9172     9998     +826     
+ Misses       8221     7403     -818     
- Partials     1457     1557     +100     

Flag	Coverage Δ
#cluster	44.70% <33.85%> (+5.67%)	⬆️
#dm	25.15% <3.20%> (-0.19%)	⬇️
#integrate	47.75% <33.85%> (+3.97%)	⬆️
#playground	22.19% <0.00%> (-0.03%)	⬇️
#tiup	10.84% <0.00%> (-0.09%)	⬇️
#unittest	18.82% <49.16%> (+0.25%)	⬆️

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

Impacted Files	Coverage Δ
pkg/cluster/manager.go	66.27% <34.21%> (+6.57%)	⬆️
pkg/cluster/api/pdapi.go	54.19% <42.85%> (+2.37%)	⬆️
pkg/cluster/spec/tikv.go	55.61% <60.00%> (+0.23%)	⬆️
pkg/cluster/spec/validate.go	93.50% <60.00%> (-2.97%)	⬇️
pkg/cluster/spec/spec.go	89.38% <84.61%> (+3.18%)	⬆️
pkg/cluster/spec/server_config.go	65.07% <86.36%> (+5.61%)	⬆️
components/cluster/command/deploy.go	74.00% <100.00%> (+0.53%)	⬆️
components/cluster/command/scale_out.go	70.21% <100.00%> (+0.64%)	⬆️
pkg/cluster/spec/tispark.go	67.39% <0.00%> (+1.08%)	⬆️
pkg/cluster/operation/action.go	51.51% <0.00%> (+1.86%)	⬆️
... and 30 more

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[lonng]

Rest LGTM

[lonng]

LGTM

[lonng]

/merge

[ti-srebot]

Your auto merge job has been accepted, waiting for:

• 817
• 816
• 815

[ti-srebot]

/run-all-tests

[ti-srebot]

@lucklove merge failed.