kubernetes-sigs/controller-tools

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Tools to use with the controller-runtime libraries

Stars: 868
Forks: 482
Open beginner issues: 0
Indexed issues: 29
Avg merge: 1d 11h
Merged PRs (30d): 8

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 9, 2026
Latest indexed: Sep 18, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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29 open issues indexed

APIs embedding batchv1.JobSpec get rejected due to missing k8s:maxItems implementation Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

kubernetes-sigs/controller-tools#1473 · 1 comment · Opened Sep 6, 2026
controller-gen does not support XValidation on type aliases Open

Difficulty 3/5 1-2 days Newbie friendliness 64/100

kubernetes-sigs/controller-tools#1462 · Opened Aug 5, 2026
Make controller-gen version in generated output optional Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

kubernetes-sigs/controller-tools#1436 · 1 reaction · Opened Jun 17, 2026
controller-gen: add a flag to ignore top level object and type metadata to crd generator Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

kubernetes-sigs/controller-tools#1431 · 17 comments · Opened Jun 14, 2026
crd: nondeterministic x-kubernetes-validations order when +k8s: markers are mixed with +kubebuilder:validation:XValidation on one field Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

kubernetes-sigs/controller-tools#1429 · 5 comments · 1 reaction · Opened Jun 11, 2026
metadata.name validation Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

kubernetes-sigs/controller-tools#1424 · 5 comments · Opened Jun 9, 2026
controller-gen: Why uint32/uint64 are mapped to int32/int64? Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

kubernetes-sigs/controller-tools#1411 · 3 comments · Opened May 11, 2026
Allow `AtMostOneOf`/`ExactlyOneOf`/`AtLeastOneOf` markers to emit OpenAPI `oneOf`/`anyOf` instead of CEL Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

kubernetes-sigs/controller-tools#1409 · 2 comments · 1 reaction · Opened May 9, 2026
Align the project with AI contribution standards Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

kubernetes-sigs/controller-tools#1382 · 2 comments · Opened Apr 19, 2026
Please enable Copilot reviews Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

kubernetes-sigs/controller-tools#1380 · 8 comments · Opened Apr 19, 2026
Inconsistent handling of YEAR substitution across generators Open

kubernetes-sigs/controller-tools#1371 · 18 comments · 1 reaction · 1 assignee · Opened Mar 27, 2026
Value of supporting RBAC and Webhook generation? Open

lifecycle/stale

Difficulty 5/5 Over a week Newbie friendliness 20/100

kubernetes-sigs/controller-tools#1350 · 14 comments · Opened Feb 19, 2026
Feature Request: Provide an explicit way to opt out of type-level validations Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

kubernetes-sigs/controller-tools#1301 · 10 comments · Opened Oct 30, 2025
Request for Enhancement: Feature Gate Support in controller-gen Open

lifecycle/frozen

Difficulty 5/5 Over a week Newbie friendliness 25/100

kubernetes-sigs/controller-tools#1238 · 4 comments · 1 reaction · Opened Jul 17, 2025
It should be possible to line break CEL validation expressions Open

lifecycle/frozen

Difficulty 4/5 3-5 days Newbie friendliness 45/100

kubernetes-sigs/controller-tools#1146 · 12 comments · 1 reaction · Opened Feb 7, 2025
Pathological CRD generation when struct names clash Open

lifecycle/frozen

Difficulty 4/5 3-5 days Newbie friendliness 35/100

kubernetes-sigs/controller-tools#1137 · 7 comments · Opened Jan 29, 2025
Generating manifest with backtick in pattern Open

kind/bug lifecycle/frozen

Difficulty 3/5 1-2 days Newbie friendliness 48/100

kubernetes-sigs/controller-tools#1084 · 8 comments · Opened Nov 2, 2024
controller-gen: Type aliases to array types don't work with +listType/+listMapKey markers Open

kind/bug lifecycle/frozen

Difficulty 3/5 1-2 days Newbie friendliness 48/100

kubernetes-sigs/controller-tools#988 · 7 comments · 1 reaction · Opened Jun 12, 2024
Add verbosity to `controller-gen` Open

help wanted lifecycle/frozen

kubernetes-sigs/controller-tools#889 · 8 comments · 1 reaction · 1 assignee · Opened Mar 6, 2024
controller-gen fails to handle individual file in paths Open

lifecycle/frozen

kubernetes-sigs/controller-tools#837 · 17 comments · 2 reactions · 1 assignee · Opened Jul 26, 2023
Promote minimized CRD ObjectMeta type to be it's own named type Open

help wanted lifecycle/frozen

kubernetes-sigs/controller-tools#805 · 12 comments · 15 reactions · 1 assignee · Opened Apr 27, 2023
Role and Clusterrole binding are not generated correctly Open

help wanted kind/feature

kubernetes-sigs/controller-tools#760 · 2 comments · 3 reactions · 1 assignee · Opened Jan 12, 2023
Support for a feature gate flag/marker when generating CRDs Open

help wanted lifecycle/frozen

Difficulty 5/5 Over a week Newbie friendliness 25/100

kubernetes-sigs/controller-tools#600 · 25 comments · 1 reaction · Opened Aug 26, 2021
Marker comment ignored if immediately followed by anything other than newline Open

lifecycle/frozen

kubernetes-sigs/controller-tools#551 · 44 comments · 14 reactions · 1 assignee · Opened Mar 29, 2021
Ability to skip descriptions per field or per package Open

lifecycle/frozen

kubernetes-sigs/controller-tools#441 · 18 comments · 8 reactions · 1 assignee · Opened May 19, 2020
Warn about things that we strongly recommend avoiding Open

good first issue help wanted kind/feature lifecycle/frozen priority/important-soon

kubernetes-sigs/controller-tools#434 · 8 comments · 1 reaction · 1 assignee · Opened Apr 27, 2020
Marker for x-kubernetes-immutable and x-kubernetes-immutable-keys Open

lifecycle/frozen

Difficulty 3/5 1-2 days Newbie friendliness 30/100

kubernetes-sigs/controller-tools#339 · 2 comments · Opened Oct 11, 2019
auto generate sample yaml spec Open

help wanted kind/feature lifecycle/frozen

Difficulty 5/5 Over a week Newbie friendliness 25/100

kubernetes-sigs/controller-tools#726 · 7 comments · 13 reactions · Opened Aug 6, 2019
Tool to generate API documentation in markdown Open

help wanted lifecycle/frozen

kubernetes-sigs/controller-tools#240 · 20 comments · 13 reactions · 1 assignee · Opened Jul 8, 2019

kubernetes-sigs/controller-tools

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