Skip evict store when only 1 tikv

[lucklove]

Fix #661

Signed-off-by: lucklove gnu.crazier@gmail.com

Support skipping evicting store when there is only 1 tikv

[codecov-commenter]

Codecov Report

Merging #662 into master will increase coverage by 0.62%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #662      +/-   ##
==========================================
+ Coverage   56.71%   57.34%   +0.62%     
==========================================
  Files         242      243       +1     
  Lines       17469    17516      +47     
==========================================
+ Hits         9908    10045     +137     
+ Misses       6265     6168      -97     
- Partials     1296     1303       +7     

Flag	Coverage Δ
#coverage	57.34% <ø> (+0.62%)	⬆️

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

Impacted Files	Coverage Δ
...c/github.com/pingcap/tiup/pkg/cluster/spec/spec.go	90.94% <0.00%> (-2.62%)	⬇️
...hub.com/pingcap/tiup/pkg/cluster/ansible/import.go	48.07% <0.00%> (-1.93%)	⬇️
...c/github.com/pingcap/tiup/pkg/cluster/spec/tikv.go	52.85% <0.00%> (-1.56%)	⬇️
...m/pingcap/tiup/components/cluster/command/check.go	81.63% <0.00%> (-0.50%)	⬇️
...src/github.com/pingcap/tiup/pkg/cluster/manager.go	70.37% <0.00%> (-0.20%)	⬇️
....com/pingcap/tiup/pkg/cluster/spec/spec_manager.go	67.50% <0.00%> (-0.15%)	⬇️
...c/github.com/pingcap/tiup/pkg/cluster/api/dmapi.go	61.31% <0.00%> (ø)
....com/pingcap/tiup/pkg/cluster/operation/destroy.go	54.48% <0.00%> (ø)
...com/pingcap/tiup/pkg/cluster/spec/server_config.go	65.87% <0.00%> (ø)
....com/pingcap/tiup/pkg/cluster/clusterutil/retry.go
... and 8 more

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[july2993]

also skip in PostRestart?
rest LGTM

[lonng]

Do we need to skip the evict leader for PD?

[lucklove]

Do we need to skip the evict leader for PD?

PD has already been skipped.

[lonng]

/merge

[ti-srebot]

Your auto merge job has been accepted, waiting for:

• 659