operator: add image upgrade with env vars

[hj-johannes-lee]

Fixes: #1390

[codecov-commenter]

Codecov Report

Merging #1499 (5bd1ff3) into main (ba3ded1) will decrease coverage by 0.11%.
Report is 2 commits behind head on main.
The diff coverage is 14.28%.

❗ Current head 5bd1ff3 differs from pull request most recent head 26bf615. Consider uploading reports for the commit 26bf615 to get more accurate results

@@            Coverage Diff             @@
##             main    #1499      +/-   ##
==========================================
- Coverage   49.58%   49.48%   -0.11%     
==========================================
  Files          42       42              
  Lines        4917     4923       +6     
==========================================
- Hits         2438     2436       -2     
- Misses       2339     2345       +6     
- Partials      140      142       +2     

Files Changed	Coverage Δ
pkg/controllers/dlb/controller.go	17.35% <0.00%> (ø)
pkg/controllers/dsa/controller.go	6.77% <0.00%> (ø)
pkg/controllers/fpga/controller.go	16.66% <0.00%> (ø)
pkg/controllers/gpu/controller.go	47.70% <0.00%> (ø)
pkg/controllers/iaa/controller.go	6.77% <0.00%> (ø)
pkg/controllers/qat/controller.go	9.72% <0.00%> (ø)
pkg/controllers/sgx/controller.go	10.74% <0.00%> (ø)
pkg/controllers/reconciler.go	4.56% <28.57%> (+0.30%)	⬆️

... and 1 file with indirect coverage changes

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[mythi]

This change alone does not mean anything without proper documentation and the necessary Makefile changes to get CSVs properly generated.

The goal for 0.28 should be that when users have 0.27 installed via OLM from operatorhub.io, the 0.28 release will be seamlessly upgraded using this flow.

[tkatila]

Stupid question: Is the _SHA setting left for the user? I see that the --use-image-digests defines the operator image as a digest, but nothing for the plugins.

[mythi]

Is the _SHA setting left for the user?

no, they will be part of the OLM bundle we set when we upload to operatorhub.io (or the OCP team uploads to redhat certification)

[tkatila]

Is the _SHA setting left for the user?

no, they will be part of the OLM bundle we set when we upload to operatorhub.io (or the OCP team uploads to redhat certification)

Ok, by "user" I meant the user creating the bundle. So it's done manually, not by some makefile wizardry.