Tracking issue for bringing back API operations-related code if there is demand

[Arnavion]

API operations-related code such as the Pod::list() fn were dropped in the v0.20 release.

Upstream's OpenAPI spec changed a few things related to API operations in v1.28 that would've required non-trivial changes in k8s-openapi-codegen-common. I implemented some of those changes and could've implemented the rest of them given more time and effort, but it made me re-evaluate whether there was any point in keeping this code in the first place. AFAIK everyone (*) uses k8s-openapi through kube and thus only uses k8s-openapi for the resource types, not their associated methods, since kube has its own API for operations.

If you did use the methods provided by k8s-openapi, then:

1. Do not update to k8s-openapi v0.20 or to kube releases that require k8s-openapi v0.20

2. Comment here to let me know that you exist. Also tell me if there's any reason you can't use kube instead.

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Depending on how much demand there is for the API operations-related code in k8s-openapi, there are a few possible outcomes:

• I might implement the changes to the code generator needed to support API operations with v1.28+ and bring back the API operations-related code.

• I might maintain patch releases of v0.19.x for some time, that continue to get updates other than v1.28+ support. ie v0.19.x patch releases will be limited to Kubernetes 1.27 and earlier, but they will get other bugfixes.

• I might implement a separate API that is generic like kube's is but also sans-io like the original k8s-openapi one. (I already did this partially for the sake of this repository's tests, so it would be a matter of adding more methods to it, cleaning it up for public consumption, and maintaining it.)

• Something else.

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(*): I queried users at $dayjob, and asked on the Rust IRC channel which got a few responses.

[erebe]

Hello,

We are using this method in order to query the stats of the node directly.

let node_summary_request = Node::connect_get_proxy_with_path(node_name, "stats/summary", Default::default()).unwrap();

It seems this method have been removed by the change you describe.

Could you let me know if it is correct ? And if yes, if you see any alternative in the latest version to achieve this ?
At the moment, we pinned the version to v0.19.0 to avoid the breaking change.

Regards

[Arnavion]

Right, that is an API operation and so it has been removed. Also kube does not implement the full proxy API to .../proxy yet.

But since k8s-openapi never implemented the rest of the proxy response / stream handling, you presumably already have code to do that yourself. So you don't need support from kube for it anyway, just the http::Request that k8s-openapi used to give you. You can create it yourself as k8s-openapi used to: https://docs.rs/k8s-openapi/0.19.0/src/k8s_openapi/v1_27/api/core/v1/node.rs.html#178-199

[erebe]

Thank you for the swift answer @Arnavion.
Indeed, we have a custom parser for the raw bytes returned by this call.
We will try to use http::Request directly as you suggest :)

Thank you for Kube-rs

[chubei]

First of all thank you for your amazing work!

Responding to the comment request, we're using Pod::log_stream because Api::<Pod>::LogStream doesn't check (or expose) the status code of the HTTP response.

[Arnavion]

Yes, comparing Client::request_text (used by other CRUD API) with Client::request_stream (used by Pod::log_stream), the latter is missing the handle_api_errors or equivalent that would act on res.status(). Once it did that, that would solve the "check" problem, and it would also result in the status code appearing as Err(Error::Api(...)) which would solve the "expose" problem.

I didn't find an open issue on their tracker about this, so please open one and link it here.

[chubei]

Thanks for the research! Opened kube-rs/kube#1300.