[optimization] Do not re-fetch resource on first attempt on upgrade#952
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msafwankarim
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Hi! Thanks for submitting the PR. Looks good to me, pipeline is failing because of 429. I'm approving PR right now, we will re-run link check action after some time and then we can go ahead and merge this. Thank you!
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[optimization] Do not re-fetch resource on first attempt on upgrade
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With the #877 change we noticed a performance degradation with Reloader on one of our clusters, having quite a lot of traffic with constant changes to CMs and Secrets. With the current implementation we are getting into API Server rate limiting issues.
When
upgradestarts all the resources per kind are fetched with theItemsFuncand right after that for each of the items it is again re-fetched with theItemFunc. This is suboptimal and brings quite a lot more unnecessary API calls. We should re-fetch resource only when there is a conflict error. This approach is implemented with this change.