[EKS] [request]: Enable StartupProbe feature gate for EKS 1.16+

[blodan]

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Tell us about your request
Add the StartupProbe feature gate which was released in Kubernetes 1.16

Which service(s) is this request for?
EKS 1.16 and later

Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard?
StartupProbes was added to Kubernetes 1.16 to be able to "warmup" applications that took some time to boot, right now this feature gate is disabled so StartupProbes isn't usable in AWS EKS.

Additional context
https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/

(See StartupProbe)

More about how StartupProbes works can be found here:
https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-startup-probes

[abdennour]

Oops! I thought it was supported until i saw this issue.
Any deadline to get this work ?

[abdennour]

I've upgraded to EKS 1.17 .
Still not available :(

[cleberwarmling]

It was a bad surprise knowing that it isn't available on EKS.

[muhyousri]

I think EKS doesn't support alpha features , StartUp Probe is in beta starting 1.18

[cleberwarmling]

@muhyousri Yeap! I saw that after posting here. So, hoping to 1.18 to be available soon.

[abdennour]

Hopefully @muhyousri @cleberwarmling
😔

[abdennour]

For now, if anyone has a long boot time ( slow startup), he can check workarounds here kubernetes/kubernetes#27114

[tabern]

closing this as EKS does not support alpha features/feature gates. This is resolved by #809