KEP-3705: update CloudDualStackNodeIPs to beta #3975
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| So assuming no bugs, the only visible change after (just) enabling the | ||
| feature is the duplicate annotation. | ||
| No |
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Isn't https://github.com/kubernetes/enhancements/pull/3898/files effectively a change in default behavior?
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Ok - I guess you're dropping the proposal from that PR, right?
Assuming I'm right here, I actually like it especially given backward compatibility here...
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I'm not sure which part of that PR you're referring to, but it was never proposing a change in default behavior.
The original KEP-3705 said that we would
- add dual-stack
--node-ipsfor external clouds - add
--node-ip IPv4and--node-ip IPv6etc - rename the node IP annotation
#3898 just dropped parts 2 and 3 from alpha, and now this PR drops them from beta and GA too.
There was some discussion in #3898 about stuff we might do in the future, but even then, the assumption was that we'd do it in a backward-compatible way (eg, leave --node-ip with its current bad semantics and add --node-ips with new-and-improved semantics.)
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OK - I guess I was too much biased by the "late-breaking change" header. I've read it more carefully now and it all makes sense now.
| Conveniently, we can do this just by passing the dual-stack | ||
| `--node-ip` value in the existing annotation; the old cloud provider | ||
| will try to parse it as a single IP address, fail, log an error, and | ||
| leave the node in the tainted state, which is exactly what we wanted | ||
| it to do if it can't interpret the `--node-ip` value correctly. | ||
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| Therefore, we do not _need_ a new annotation for the new `--node-ip` | ||
| Therefore, we do not need a new annotation for the new `--node-ip` |
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You removed the part about the fact that annotation name is alpha.kubernetes.io/provided-node-ip - what we're going to do with it?
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As you may have noticed later, that text is still in the "Alternatives" section.
I'm not planning to do anything about the annotation as part of this KEP. I suspect I'm going to end up doing a new KEP with all of the leftover parts of this and #1665.
| are missing a bunch of machinery and tooling and can't do that now. | ||
| --> | ||
| No. The behavior during upgrade and rollback is not especially | ||
| different from the ordinary runtime behavior. |
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I agree with this statement, but still, given that IPs are propagated to cloud-provider via the annotation (so technically we have some persistent state related to this feature), I think we should test it.
Manual test is good enough here (and can be done after feature freeze and updated with the description of the test then - https://github.com/kubernetes/enhancements/pull/3658/files is a great example).
Does that make sense to you? If so, can you please switch to a TODO for running it and updating this question before promoting the feature to beta?
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/lgtm thanks! |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: danwinship, thockin, wojtek-t The full list of commands accepted by this bot can be found here. The pull request process is described here
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One-line PR description: update KEP-3705
CloudDualStackNodeIPsto beta, dropping the parts that were not implemented in alphaIssue link: Cloud Dual-Stack --node-ip Handling #3705
Other comments:
This drops the parts of the KEP that weren't implemented for alpha (
--node-ip IPv4/--node-ip IPv6, and renaming thealpha.kubernetes.io/provided-node-ipannotation), and moves some of the old text to the "Alternatives" section explaining what we didn't do and why./assign @thockin