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Status Submitted
Created by Guest
Created on Dec 22, 2023

Helm chart enhancement - Resources volume

Currently the PEM helm chart only supports one way to supply the DB driver jar to the application:


1. Statically provisioned PV bound to the PVC created by the helm chart


A related application, B2Bi, has a helm chart that provides additional options to supply the DB driver jar and other resources to the application:


2. Pre-defined PVC named in values.yaml

e.g. appResourcesPVC.preDefinedResourcePVCName


3. Init Container with included DB jars

https://www.ibm.com/docs/en/b2b-integrator/6.2.0?topic=container-setting-up-init-external-resources


Can these two options be added to the PEM helm chart?

What is your industry? Non-Industry Specific
How will this idea be used?

Currently the main ways to handle the resources PVC (containing JDBC driver, etc) are:


* Statically provisioned PV bound to the PVC created by the helm chart

* Extend the image to include the resources

* Fork the helm chart to run our own pre-install steps


None of these are particularly great options because:


* I want to use dynamically provisioned storage and not worry about creating/deleting PVs

* I do not want to extend the image every time a new version comes out

* I do not want to update my fork of the helm chart every time a new version comes out


Being able to mount an existing PVC lets me use a separate container to populate the PV after it has been dynamically provisioned - without the helm chart deleting and recreating it during the pre-install hook.


Attaching an Init Container would accomplish a similar function - populating the resources PV after the pre-install hook creates it dynamically.