myasnikovdaniil
516be4abfe
## What this PR does The Ingress, Gateway, and Route hostname `ValidatingAdmissionPolicy` objects compare tenant hostnames against the tenant apex with case-sensitive CEL. The resource-side host is always lowercase — the apiserver's hostname validation permits nothing else — but both apex operands can carry uppercase: the `namespace.cozystack.io/host` label value, which Kubernetes permits to carry uppercase and which the tenant chart writes verbatim from `tenant.spec.host`, and the templated `_cluster.root-host`, a free-form platform value that nothing validates for case. A mixed-case apex label wrongly denies a tenant its own legitimate lowercase in-apex hostname. An uppercase `_cluster.root-host` is the dangerous direction: the Ingress outside-root exclusion compares a lowercase host against the uppercase literal, never matches, so the exclusion stops excluding and the policy admits any non-wildcard host — every non-wildcard platform-apex name a tenant asks for, including a hostname belonging to another tenant and the root apex itself. Only the anti-wildcard gate still holds. This normalizes both operands of every hostname comparison with `.lowerAscii()` (host, apex label, and the templated root-host literal) across all three policies, so the match follows DNS case semantics. There is no behavior change in the default all-lowercase configuration. The Gateway policy's fail-open on an absent or empty host label is deliberately left as it was: that is the platform's one documented fail-open exception in `docs/security/threat-model.md`, so changing the posture is a security-model decision rather than a side effect of normalizing case. Its current shape is pinned by a test. Test coverage: - helm-unittest pins each comparison as a whole operand pair — equality and `endsWith`, across the rule-host and tls-host branches — so dropping the normalization from any single operand is caught. A pattern matching a lone `.lowerAscii()` would not: the apex appears four times in the Ingress expression, so stripping one operand still leaves three matches. - A rendering case with `_cluster.root-host: Example.ORG` pins the outside-root escape shut; it is red pre-fix. - e2e probes set a mixed-case apex on an isolated throwaway namespace and assert both halves of the match: a lowercase in-apex HTTPRoute and Ingress are still admitted (red pre-fix, green post-fix), while a foreign apex and a hostname ending with the apex without a dot boundary are still denied. Vacuous-pass guards re-read the persisted label and assert the probe apex really is mixed-case. Normalizing the apex at the write site — the tenant namespace template and `_cluster.root-host` — is tracked separately in #3328. It would not remove the need for this change: the host label is settable out-of-band by a trusted caller, so these policies must not assume the apex arrives normalized. Closes #3205. ### Screenshots N/A (no UI changes). ### Release note ```release-note fix(cozystack-basics): tenant hostname admission policies now compare against the tenant apex and the platform root apex case-insensitively. This closes a bypass where an uppercase `_cluster.root-host` made the Ingress policy's outside-root exclusion stop matching, so the policy admitted any non-wildcard host — including a hostname under the platform apex belonging to another tenant, and the root apex itself. ``` <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Bug Fixes** * Hostname validation now consistently matches case-insensitively across Gateway, Ingress, HTTPRoute, and TLSRoute. * Mixed-case tenant and apex hostnames are accepted when they meet the intended domain boundaries. * Foreign domains and prefix-adjacent hostnames remain correctly rejected; validation behaves as documented when the tenant host is empty. * **Tests** * Expanded unit and e2e coverage for case-insensitive hostname rendering and boundary rejections across the supported resources. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
Cozystack
Cozystack is a free platform and framework for building clouds.
Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.
With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.
Use Cozystack to build your own cloud or provide a cost-effective development environment.
Use-Cases
-
Using Cozystack to build a public cloud
You can use Cozystack as a backend for a public cloud -
Using Cozystack to build a private cloud
You can use Cozystack as a platform to build a private cloud powered by Infrastructure-as-Code approach -
Using Cozystack as a Kubernetes distribution
You can use Cozystack as a Kubernetes distribution for Bare Metal
Documentation
The documentation is located on the cozystack.io website.
Read the Getting Started section for a quick start.
If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.
Versioning
Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.
Contributions
Contributions are highly appreciated and very welcomed!
In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.
You can express your intention to on the fix on your own. Commits are used to generate the changelog, and their author will be referenced in it.
If you have a concrete feature request, open an issue. For a cross-cutting or architectural change, open a design proposal in the community repo. For questions or early ideas, use GitHub Discussions. See CONTRIBUTING.md for the full routing.
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License
Cozystack is licensed under Apache 2.0.
The code is provided as-is with no warranties.
Commercial Support
A list of companies providing commercial support for this project can be found on official site.