Add support for multi-arch images

[aledbf]

What this PR does / why we need it:

This allows users to just pull the image quay.io/kubernetes-ingress-controller/nginx-ingress-controller:X.XX.X independently of the arch (amd64, arm or arm64)

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

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[codecov-io]

Codecov Report

Merging #4271 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4271      +/-   ##
==========================================
+ Coverage   58.37%   58.39%   +0.01%     
==========================================
  Files          88       88              
  Lines        6720     6720              
==========================================
+ Hits         3923     3924       +1     
+ Misses       2369     2367       -2     
- Partials      428      429       +1

Impacted Files	Coverage Δ
internal/watch/file_watcher.go	84.61% <0%> (+3.84%)	⬆️

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[aledbf]

/retest

[billimek]

Multi-arch support would be great. Is there anything preventing this PR from moving forward?

[aledbf]

Multi-arch support would be great. Is there anything preventing this PR from moving forward?

Support in quay.io. In theory, this feature will be available before the end of the year.

[k8s-ci-robot]

@aledbf: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-ingress-nginx-chart-lint	3d40fa0389af8e2613ca2eb4c65d8b5884bdf19f	link	/test pull-ingress-nginx-chart-lint

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[rmb938]

@aledbf quay.io now supports this feature. prometheus has been using it for a while.

[aledbf]

@rmb938 this is not enabled for all the repositories in quay.io.
(I have a support ticket still open, waiting for support)

[rmb938]

Oh ok I didn't realize that.

[aledbf]

/hold cancel

[aledbf]

It seems this is working now. The next release will use a multi-arch images