diwangcanada commented on issue #8018:
URL: 
https://github.com/apache/incubator-devlake/issues/8018#issuecomment-2348910163

   > > install helm chart because of the protection. This is properly by 
design, but does it make more sense to set pv reclaim policy
   > 
   > I think it makes more sense to delete all related pvc when users 
explicitly uninstall the helm-chart intentionally. However, I wonder what would 
happen when upgrading:
   > 
   > 1. helm-chart operates in an uninstall/install manner and would delete all 
those PVCs
   > 2. or would it keep those PVCs during upgrading or downgrading?
   
   
   Maybe introduce a new parameter to control pv reclaim policy for mysql and 
grafana, and default value is "delete" for poc type of work, but set to 
"retain" for production use. It can prevent accidentally lost persistent volume 
or upgrade/downgrade manners. 
   
   


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