[sig-apps] Exception Request for KEP 961 Implementation

[Edwin Hernandez]

[Edwin Hernandez]

• Enhancement name: Statefulset maxUnavailable
• Enhancement status: beta 
• SIG: Apps
• k/enhancements repo issue #: https://github.com/kubernetes/enhancements/issues/961
• PRs: https://github.com/kubernetes/kubernetes/pull/130951, https://github.com/kubernetes/kubernetes/pull/133153
• Additional time needed (in days): 8 (until Friday)
• Reason this enhancement is critical for this milestone: This feature is a critical feature for rolling updates in statefulset that has been stuck in alpha for 4 years.
• Risks from adding code late: 
• This is a beta gated feature, therefore risk is low adding this late
• Risks from cutting this enhancement:
• This enhancement addresses a critical customer usercase that has been requested in 2019. 

On Thu, Jul 24, 2025 at 12:05 PM Edwin Hernandez <edwinhe...@google.com> wrote:

[Maciej Szulik]

As much as I'd like to see this progress to beta, the requirements outlined

in the KEP [1] have not been met for this functionality to move forward. 

I'm missing the following:

- integration and e2e tests,

- the two above PRs seem to be requiring a bit more time to land.

On top of that, we should keep in mind the recent, increased requirements 

for beta features [2]. So with all that as one of sig-apps leads I'm against

granting an exception for this KEP. I will continue working with the author

during the 1.35 cycle, to be ready for beta promotion. 

Still, I'd like to give a big shoutout to Edwin and Heba for their work and 

continued support to land this very long standing feature. 

Maciej

[1] https://github.com/kubernetes/enhancements/blob/master/keps/sig-apps/961-maxunavailable-for-statefulset/README.md#beta

[2] https://github.com/kubernetes/enhancements/tree/master/keps/sig-architecture/5241-beta-featuregate-promotion-requirements#summary

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