generic ephemeral inline volumes

[pohly]

Enhancement Description

• One-line enhancement description (can be used as a release note): inline volumes with normal provisioning
• Kubernetes Enhancement Proposal: generic ephemeral inline volumes KEP #1701
• Primary contact (assignee): @pohly
• Responsible SIGs: @kubernetes/sig-storage-feature-requests
• Enhancement target (which target equals to which milestone):
  • Alpha release target: 1.19
  • Beta release target: 1.21
  • Stable release target: 1.23

The current CSI ephemeral inline volume support is designed for CSI drivers that are specifically written for such volumes. The assumption is that such volumes can be created and destroyed quickly on a node together with the pod. Parameters are driver specific.

But ephemeral inline volumes are also useful in combination with traditional storage drivers, for example as temporary scratch space. The goal is to enable ephemeral inline volumes such that:

• normal storage drivers can provide them without having to be modified for that
• all of the usual volume parameters (size, storage class) are available
• storage capacity tracking and pod scheduling works for them

[harshanarayana]

Hey there @pohly -- 1.19 Enhancements shadow here. I wanted to check in and see if you think this Enhancement will be graduating in 1.19?

In order to have this part of the release:

1. The KEP PR must be merged in an implementable state
2. The KEP must have test plans
3. The KEP must have graduation criteria.

The current release schedule is:

• Monday, April 13: Week 1 - Release cycle begins
• Tuesday, May 19: Week 6 - Enhancements Freeze
• Thursday, June 25: Week 11 - Code Freeze
• Thursday, July 9: Week 14 - Docs must be completed and reviewed
• Tuesday, August 4: Week 17 - Kubernetes v1.19.0 released

If you do, I'll add it to the 1.19 tracking sheet (http://bit.ly/k8s-1-19-enhancements). Once coding begins please list all relevant k/k PRs in this issue so they can be tracked properly. 👍

Thanks!

[harshanarayana]

Hey @pohly, I'm following up on my previous update on this Enhancement being part of the v1.19 release.

Do you happen to have any update on the possiblity of this being included in the release v1.19?

Thanks again for your time and contributions. 🖖

[harshanarayana]

Hey @pohly, I'm following up on my previous update on this Enhancement being part of the v1.19 release.

Do you happen to have any update on the possiblity of this being included in the release v1.19?

Thanks again for your time and contributions. 🖖

[pohly]

@harshanarayana: please track this as a new alpha feature for 1.19.

The KEP still needs to be merged, but we already discussed it and should get there soon.

[harshanarayana]

Hey @pohly, thank you for confirming the inclusion into v1.19.. I will update the tracking sheets accordingly.

/milestone v1.19
/stage alpha

[harshanarayana]

Hey @pohly, Enhancement shadow for the v1.19 release cycle here. Just following up on my earlier update to inform you of the
upcoming Enhancement Freeze scheduled on Tuesday, May 19.

I noticed that the KEP is still in flight. As per the requirements, the KEP should be merged and implementable for it to be considered for the release v1.19.

Please feel free to reach out in case if you need any more information.

Regards, Harsha