kubernetes-sigs/kubectl-validate

recursive schemas not supported

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#18 opened on May 4, 2023

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good first issue

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Description

The schema validator used by Kubernetes server and kubectl-validate does not support recursively defined schemas. This can be fixed but it would be a fairly big modification.

CRDs cannot be recursive, so this is not a concern for them. There may be some native types that have a recursive schema. One example of this is CustomResourceDefinition itself. n this single case, we workaround this by using the handwritten validation code for CRDs since they are so common.

In general, we should detect and block validation of recursive schemas.

Contributor guide

Research direction
Investigate the schema validation code to identify where recursion occurs and implement a check to block validation of recursive schemas.
Tech stack
go
Domain
backendapi
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GoGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30