Separate YurtHubHost & YurtHubProxyHost

[luc99hen]

What type of PR is this?

/kind enhancement

What this PR does / why we need it:

Currently, yurthub only have one configurable host YurtHubHost for both yurthub server (metrics related API) & yurthub proxy server. The two servers served for different purposed have to share one host which is not resonable.

This PR separate these two, and make them both configurable by adding a new flag bind-proxy-address to yurthub cmd

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

This PR add a new cmd flag bind-proxy-address for yurthub.

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage

What this PR does / why we need it:

Currently, yurthub only have one configurable host YurtHubHost for both yurthub server (metrics related API) & yurthub proxy server. The two servers served for different purposed have to share one host which is not resonable.

This PR separate these two, and make them both configurable by adding a new flag bind-proxy-address to yurthub cmd

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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[codecov]

Codecov Report

Merging #959 (1ce3a71) into master (26465b0) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #959      +/-   ##
==========================================
+ Coverage   39.73%   39.78%   +0.04%     
==========================================
  Files          83       83              
  Lines       11247    11256       +9     
==========================================
+ Hits         4469     4478       +9     
  Misses       6446     6446              
  Partials      332      332              

Flag	Coverage Δ
unittests	39.78% <100.00%> (+0.04%)	⬆️

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

Impacted Files	Coverage Δ
pkg/util/ip/ip.go	40.54% <100.00%> (+19.11%)	⬆️

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[rambohe-ch]

@luc99hen It's a good idea to separate YurtHubHost into YurtHubHost and YurtHubProxyHost. agree +1

[rambohe-ch]

/lgtm
/approve

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: luc99hen, rambohe-ch

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• OWNERS [rambohe-ch]

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