Chris Farhood
0776319435
Prior commit was inconsistent — some files used <your-namespace> while DEPLOYMENT.md, TROUBLESHOOTING.md and several troubleshooting/user-guide docs still hardcoded headlamp as the namespace. Co-Authored-By: Paperclip <noreply@paperclip.ing>
105 lines
2.4 KiB
Markdown
105 lines
2.4 KiB
Markdown
# RBAC Issues
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Troubleshooting RBAC permissions and 403 errors for the Headlamp Polaris Plugin.
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## Overview
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The plugin requires `get` permission on `services/proxy` resource for the `polaris-dashboard` service in the `polaris` namespace. Without this permission, you'll see 403 Forbidden errors.
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## Common Scenarios
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### 403 Forbidden Error
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**Symptom:** Error loading Polaris data, "Access denied (403)" in UI
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**Cause:** Missing or incorrect RBAC binding
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**Solution:**
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```bash
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# 1. Verify RBAC resources exist
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kubectl -n polaris get role polaris-proxy-reader
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kubectl -n polaris get rolebinding headlamp-polaris-proxy
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# If missing, apply RBAC:
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kubectl apply -f - <<EOF
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: Role
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metadata:
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name: polaris-proxy-reader
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namespace: polaris
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rules:
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- apiGroups: [""]
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resources: ["services/proxy"]
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resourceNames: ["polaris-dashboard"]
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verbs: ["get"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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name: headlamp-polaris-proxy
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namespace: polaris
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subjects:
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- kind: ServiceAccount
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name: headlamp
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namespace: <your-namespace>
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roleRef:
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kind: Role
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name: polaris-proxy-reader
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apiGroup: rbac.authorization.k8s.io
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EOF
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```
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### Token-Auth Mode
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**Symptom:** 403 error when using Headlamp with user-supplied tokens
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**Cause:** User's own identity lacks the RoleBinding
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**Solution:**
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Bind the Role to authenticated users or specific users/groups:
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```yaml
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: RoleBinding
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metadata:
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name: users-polaris-proxy
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namespace: polaris
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subjects:
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- kind: Group
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name: system:authenticated # All authenticated users
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apiGroup: rbac.authorization.k8s.io
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roleRef:
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kind: Role
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name: polaris-proxy-reader
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apiGroup: rbac.authorization.k8s.io
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```
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### Testing Permissions
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```bash
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# Test service account (in-cluster mode)
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kubectl auth can-i get services/proxy \
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--as=system:serviceaccount:<your-namespace>:headlamp \
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-n polaris \
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--resource-name=polaris-dashboard
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# Test user (token-auth mode)
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kubectl auth can-i get services/proxy \
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--as=user@example.com \
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-n polaris \
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--resource-name=polaris-dashboard
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# Expected output: yes
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```
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For detailed RBAC configuration, see [RBAC Permissions](../user-guide/rbac-permissions.md).
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## References
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- [Kubernetes RBAC](https://kubernetes.io/docs/reference/access-authn-authz/rbac/)
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- [Service Proxy RBAC](https://kubernetes.io/docs/tasks/administer-cluster/access-cluster-services/)
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