OCP/Telco Definition of Done
Epic Template descriptions and documentation.

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Epic Goal

• Reduce CPU Idle/Stressed, Memory Idle/Stressed, Container Count, Image Size target metrics as predicted in https://docs.google.com/presentation/d/1j646hJDVNefFfy1Z7glYx5sNBnSZymDjCbUQVOZJ8CE

Why is this important?

• Having reduced resource footprint for Edge customers that are not having as much room in their k8s installations as most kubernetes distributions is important for LVMS usability
• Red Hat can now offer a native Dynamic Provisioning Local Storage Provider with a minimal footprint that sets it apart from other Providers.
• LVMS can now be the goto Local Storage Provider for Edge, especially for small form factor SNO deployments.
• MicroShift can save resources AND gain features from switching to LVMS instead of pure TopoLVM by using our optimizations for Red Hat Device Edge.
• The Telco RAN Reference Specification can consider LVMS an alternative to LSO without compromising on resources, allowing it to run in the Management CoreSet, freeing up resources for customers.

Scenarios

1. Microshift is run with TopoLVM Midstream via existing lvmd.conf file and needs to have all previous functionality of TopoLVM while consuming less resources at idle or under stress
2. While LVMS is already migrated to a minifed version for SNO/MNO customers for 4.16, Microshift still needs to work with the previous version of non-modified TopoLVM to ensure its compatibility guarantees

Acceptance Criteria

• Container Count reduction
  • 1 Deployment (2 before)
  • 1 DaemonSet (2 before)
  • 2 Containers (11 before)
  • 4 Services (5 before)
• CPU / Memory reduction
  • See https://docs.google.com/spreadsheets/d/1hau7opDQ3hY3DXc9Q0ptkiER90_I1fsxodwuAZPrt30/edit?usp=sharing for target metrics here
• Image count/ size reduction
  • Total Image Size <100 Mi
  • Total Image Count 1
• Fully upgradeable via CSV Subscription
• Not breaking any APIs
• Fully compatible with previous versions of LVMS
• No disabled Controllers or otherwise critical functionality

Dependencies (internal and external)

Previous Work (Optional):

1. https://issues.redhat.com/browse/OCPEDGE-662 - Investigate MicroLVMS Compatibility with Microshift and propose Migration Scenarios

Open questions:

Done Checklist

• CI - CI is running, tests are automated and merged.
• Release Enablement <link to Feature Enablement Presentation>
• DEV - Upstream code and tests merged: <link to meaningful PR or GitHub Issue>
• DEV - Upstream documentation merged: <link to meaningful PR or GitHub Issue>
• DEV - Downstream build attached to advisory: <link to errata>
• QE - Test plans in Polarion: <link or reference to Polarion>
• QE - Automated tests merged: <link or reference to automated tests>
• DOC - Downstream documentation merged: <link to meaningful PR>