add raven l7 dns controller

[River-sh]

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 enhancement
/kind feature
/sig network

What this PR does / why we need it:

This controller maintains a configmap record that requests across network domains are forwarded to the Gateway node by the Raven Agent

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

A configmap named edge-tunnel-nodes is mounted to CoreDNS using the hosts plugin, the DNS controller is responsible for maintaining this configmap and maps requests of acrossing pools to the x-raven-proxy-internal-svc address

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 enhancement
/kind feature
/sig network

What this PR does / why we need it:

This controller maintains a configmap record that requests across network domains are forwarded to the Gateway node by the Raven Agent

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

other Note

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.

[codecov]

Codecov Report

Merging #1658 (919bcff) into master (efe75d5) will decrease coverage by 0.25%.
Report is 1 commits behind head on master.
The diff coverage is 33.03%.

@@            Coverage Diff             @@
##           master    #1658      +/-   ##
==========================================
- Coverage   52.32%   52.07%   -0.25%     
==========================================
  Files         154      156       +2     
  Lines       17637    17858     +221     
==========================================
+ Hits         9228     9299      +71     
- Misses       7582     7716     +134     
- Partials      827      843      +16     

Flag	Coverage Δ
unittests	52.07% <33.03%> (-0.25%)	⬇️

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

Files Changed	Coverage Δ
...yurtmanager/controller/raven/dns/dns_controller.go	30.06% <30.06%> (ø)
...nager/controller/raven/dns/dns_enqueue_handlers.go	41.37% <41.37%> (ø)

... and 1 file with indirect coverage changes

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
3 Code Smells

No Coverage information
1.9% Duplication

[rambohe-ch]

/lgtm

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BSWANG, rambohe-ch, River-sh

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• OWNERS [rambohe-ch]

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