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docs(install): document that default namespace is unsupported for pipelines on OpenShift (#3427) #3440

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docs(install): document that default namespace is unsupported for pipelines on OpenShift (#3427) #3440

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10 changes: 10 additions & 0 deletions docs/install.md
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Expand Up @@ -30,3 +30,13 @@ To configure images from a custom registry, follow the [Air Gap Configuration](.
```
$ kubectl apply -f https://raw.githubusercontent.com/tektoncd/operator/main/config/crs/kubernetes/config/all/operator_v1alpha1_config_cr.yaml
```

## Platform notes

### OpenShift: do not run pipelines in the `default` namespace

On OpenShift, the `default` namespace is classified as a "highly privileged" system namespace. Pod Security Admission (PSA) label synchronization is permanently disabled there by the platform, so even though the operator correctly creates the `pipeline` ServiceAccount and RBAC bindings in `default`, PipelineRuns submitted to that namespace fail with `permissionDenied` errors: PSA enforces the `restricted` profile and the SCC-to-PSA label sync never runs.

User-created namespaces are not affected because the Cluster Policy Controller automatically syncs SCC privileges into PSA labels. The OpenShift documentation has the same guidance ([Do not run workloads in or share access to default projects](https://docs.openshift.com/container-platform/latest/welcome/index.html#about-namespaces)).
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@anithapriyanatarajan anithapriyanatarajan May 21, 2026

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The hyperlink to docs is not redirecting the namespace page. Please check or add link to the blog - https://www.redhat.com/en/blog/openshift-runtime-security-best-practices


Run pipelines in a dedicated namespace instead of `default` on OpenShift. See [tektoncd/operator#3427](https://github.com/tektoncd/operator/issues/3427) for the original report.
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