[GitHub] [airflow] potiuk commented on pull request #17282: Chart: Add instructions to Update Helm Repo before upgrade

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potiuk commented on pull request #17282:
URL: https://github.com/apache/airflow/pull/17282#issuecomment-888098780


   Just to explore it still @kaxil. 
   
   I am not convinced what is the best way. I still think we CAN publish index with .yaml with "archives", it's just important what is the timing of this publishing.
   
   From what I saw, the delays of copying "downloads" to "archives" is small (I believe it is less than hour always from earlier discussions). In fact, the release policy of ASF specifically mentions: "downloads.apache.org is automatically archived. Therefore, a copy of an official release will already exist in the archives. To move a release to the archives, just delete the copy in your project's dist directory. Remember to update any links from the download page." 
   
   And I think it is in our hands to delay publishing the new `index.yaml` whenever we save chart to the repository. We have two options:
   
   * we could wait with publishing the new index.yaml until "archives" copy is available (and make announcements an hour later).
   * we could also make it a  "stage" publishing - ie. publish "downloads" link together with SVN update, and automatically replace it with "archives" when the archive copy is available
   
   I think both scenarios provide "uninterrupted" use of helm chart and we can fully automate both of those scenarios. And also prevent our users the surprises like https://apache-airflow.slack.com/archives/C027H098M1C/p1627440863116600 where it basically invalidates the old index you already have locally cached. The error message in this case is not telling too much and I think there is a benefit with having the "stable" links to download the charts.


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