Feat/resolver

[vearne]

What is the purpose of the change

In my scenario, my nameservers are hosts represented by a group of domain names. So I need a new resolver to resolve the nameservers.

Brief changelog

add dns Resolver to resolve name server

Verifying this change

go test . -v --run TestDNSResolver

[xujianhai666]

fmt before pr agian. @vearne

[codecov-io]

Codecov Report

Merging #552 (8208f59) into master (e1d9be8) will increase coverage by 0.12%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master     #552      +/-   ##
==========================================
+ Coverage   24.21%   24.33%   +0.12%     
==========================================
  Files          48       48              
  Lines        5010     5026      +16     
==========================================
+ Hits         1213     1223      +10     
- Misses       3598     3602       +4     
- Partials      199      201       +2     

Impacted Files	Coverage Δ
primitive/nsresolver.go	55.14% <60.00%> (+0.79%)	⬆️
consumer/push_consumer.go	11.46% <0.00%> (+0.12%)	⬆️

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[vearne]

ok xujianhai666 <notifications@github.com> 于2020年11月26日周四 下午2:21写道：

…

fmt before pr agian. @vearne <https://github.com/vearne> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#552 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AB6GYNDWZ5FBOPX4OPLEXSTSRXXW7ANCNFSM4TMFX72A> .

[xujianhai666]

sorry for that I merge incorrectly, could pull request again with format "https://github.com/apache/rocketmq/wiki/RIP-14-RocketMQ-Community-Operation-Conventions"

[vearne]

sorry for that I merge incorrectly, could pull request again with format "https://github.com/apache/rocketmq/wiki/RIP-14-RocketMQ-Community-Operation-Conventions"

Is something wrong in my comment?

[vearne]

@xujianhai666 Is something wrong in my comment?