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charts: Remove ClusterRole default
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‎Makefile‎

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@@ -378,6 +378,10 @@ helm-template-test:
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helm-update-template-version:
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charts/headlamp/tests/update-version.sh
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.PHONY: helm-test-pre-upgrade-hook
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helm-test-pre-upgrade-hook:
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charts/headlamp/tests/test-pre-upgrade-hook.sh
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# TODO: add windows compatibility
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.PHONY: run-jaeger
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run-jaeger:

‎charts/headlamp/Chart.yaml‎

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url: https://keys.openpgp.org/vks/v1/by-fingerprint/2956B7F7167769370C93730C7264DA7B85D08A37
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artifacthub.io/category: monitoring-logging
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artifacthub.io/license: Apache-2.0
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artifacthub.io/changes: |
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- kind: changed
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description: The default ClusterRoleBinding is no longer created by default (ClusterRoleBinding creation is now disabled). Users who want a ClusterRoleBinding must now explicitly enable it and provide a clusterRoleName value, as the default clusterRoleName is now empty.
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- kind: added
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description: Pre-upgrade hook automatically removes old ClusterRoleBinding during upgrades
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artifacthub.io/screenshots: |
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- title: Cluster Overview
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url: https://raw.githubusercontent.com/kubernetes-sigs/headlamp/screenshots/screenshots/cluster_overview.png

‎charts/headlamp/README.md‎

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@@ -53,6 +53,16 @@ $ helm install my-headlamp headlamp/headlamp \
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--set ingress.hosts[0].paths[0].path=/
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```
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## Upgrading
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### Security Improvements
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Starting from version 0.39.0, the chart implements enhanced security by default:
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- **Removed Permissions**: The default ClusterRoleBinding creation has been disabled (`create: false`), removing the previous `cluster-admin` binding.
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**Automatic Migration**: A pre-upgrade hook automatically removes the old `headlamp-admin` ClusterRoleBinding during upgrades to help migrate to the new security configuration. The hook only removes ClusterRoleBindings that were created by Helm, preserving any user-created resources with the same name.
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## Configuration
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### Core Parameters
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| serviceAccount.create | bool | `true` | Create service account |
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| serviceAccount.name | string | `""` | Service account name |
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| serviceAccount.annotations | object | `{}` | Service account annotations |
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| clusterRoleBinding.create | bool | `true` | Create cluster role binding |
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| clusterRoleBinding.clusterRoleName | string | `"cluster-admin"` | Kubernetes ClusterRole name |
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| clusterRoleBinding.create | bool | `false` | Create cluster role binding |
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| clusterRoleBinding.clusterRoleName | string | `""` | Kubernetes ClusterRole name |
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| clusterRoleBinding.annotations | object | `{}` | Cluster role binding annotations |
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| hostUsers | bool | `true` | Run in host uid namespace |
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| podSecurityContext | object | `{}` | Pod security context (e.g., fsGroup: 2000) |

‎charts/headlamp/templates/NOTES.txt‎

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@@ -20,13 +20,15 @@
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echo "Visit http://127.0.0.1:8080 to use your application"
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kubectl --namespace {{ include "headlamp.namespace" . }} port-forward $POD_NAME 8080:$CONTAINER_PORT
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{{- end }}
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{{- if .Values.clusterRoleBinding.create }}
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{{- if and ( ge .Capabilities.KubeVersion.Major "1" ) ( ge .Capabilities.KubeVersion.Minor "24" ) }}
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2. Get the token using
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kubectl create token {{ include "headlamp.serviceAccountName" . }} --namespace {{ include "headlamp.namespace" . }}
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2. Create a service account using
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kubectl create serviceaccount {{ include "headlamp.serviceAccountName" . }}-admin --namespace {{ include "headlamp.namespace" . }}
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3. Create a clusterrolebinding using
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kubectl create clusterrolebinding {{ include "headlamp.serviceAccountName" . }}-admin --clusterrole=cluster-admin --serviceaccount={{ include "headlamp.namespace" . }}:{{ include "headlamp.serviceAccountName" . }}-admin
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4. Get the token using
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kubectl create token {{ include "headlamp.serviceAccountName" . }}-admin --namespace {{ include "headlamp.namespace" . }}
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{{- else }}
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2. Get the clusterrolebinding token using
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5. Get the clusterrolebinding token using
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export SECRET=$(kubectl get secrets --namespace {{ include "headlamp.namespace" . }} -o custom-columns=":metadata.name" | grep "{{ include "headlamp.fullname" . }}-token")
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kubectl get secret $SECRET --namespace {{ include "headlamp.namespace" . }} --template=\{\{.data.token\}\} | base64 --decode
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{{- end }}
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{{- end }}

‎charts/headlamp/templates/clusterrolebinding.yaml‎

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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: {{ include "headlamp.fullname" . }}-admin
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name: {{ include "headlamp.fullname" . }}
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labels:
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{{- include "headlamp.labels" . | nindent 4 }}
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{{- with .Values.clusterRoleBinding.annotations }}
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: {{ .Values.clusterRoleBinding.clusterRoleName }}
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name: {{ required "clusterRoleBinding.clusterRoleName is required when clusterRoleBinding.create is true" .Values.clusterRoleBinding.clusterRoleName }}
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subjects:
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- kind: ServiceAccount
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name: {{ include "headlamp.serviceAccountName" . }}

‎charts/headlamp/templates/pre-upgrade-cleanup.yaml‎

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---
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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namespace: {{ include "headlamp.namespace" . }}
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labels:
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{{- include "headlamp.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": pre-upgrade
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"helm.sh/hook-weight": "-5"
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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labels:
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{{- include "headlamp.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": pre-upgrade
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"helm.sh/hook-weight": "-5"
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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rules:
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- apiGroups: ["rbac.authorization.k8s.io"]
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resources: ["clusterrolebindings"]
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verbs: ["get", "delete"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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labels:
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{{- include "headlamp.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": pre-upgrade
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"helm.sh/hook-weight": "-4"
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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roleRef:
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apiGroup: rbac.authorization.k8s.io
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kind: ClusterRole
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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subjects:
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- kind: ServiceAccount
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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namespace: {{ include "headlamp.namespace" . }}
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---
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apiVersion: batch/v1
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kind: Job
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metadata:
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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namespace: {{ include "headlamp.namespace" . }}
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labels:
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{{- include "headlamp.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": pre-upgrade
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"helm.sh/hook-weight": "-3"
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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spec:
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ttlSecondsAfterFinished: 300
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template:
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metadata:
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name: {{ include "headlamp.fullname" . }}-pre-upgrade
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labels:
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{{- include "headlamp.labels" . | nindent 8 }}
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spec:
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serviceAccountName: {{ include "headlamp.fullname" . }}-pre-upgrade
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restartPolicy: Never
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containers:
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- name: pre-upgrade-cleanup
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image: alpine/kubectl:1.35.0@sha256:e7e078c7bb25012141e5957d500834b2a5b266d6de20ecfa862b30d8a892fc7e
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command:
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- /bin/sh
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- -c
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- |
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set -e
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CRB_NAME="{{ include "headlamp.fullname" . }}-admin"
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RELEASE_NAME="{{ .Release.Name }}"
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echo "Checking for old ClusterRoleBinding ${CRB_NAME}..."
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if ! kubectl get clusterrolebinding "${CRB_NAME}" 2>/dev/null; then
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echo "ClusterRoleBinding ${CRB_NAME} not found, nothing to clean up"
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exit 0
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fi
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echo "Found ClusterRoleBinding ${CRB_NAME}, verifying it was created by Helm..."
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# Check if the ClusterRoleBinding has Helm labels indicating it was created by this chart
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MANAGED_BY=$(kubectl get clusterrolebinding "${CRB_NAME}" -o jsonpath='{.metadata.labels.app\.kubernetes\.io/managed-by}' 2>/dev/null || echo "")
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INSTANCE=$(kubectl get clusterrolebinding "${CRB_NAME}" -o jsonpath='{.metadata.labels.app\.kubernetes\.io/instance}' 2>/dev/null || echo "")
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APP_NAME=$(kubectl get clusterrolebinding "${CRB_NAME}" -o jsonpath='{.metadata.labels.app\.kubernetes\.io/name}' 2>/dev/null || echo "")
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if [ "${MANAGED_BY}" = "Helm" ] && [ "${INSTANCE}" = "${RELEASE_NAME}" ] && [ "${APP_NAME}" = "headlamp" ]; then
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echo "Confirmed: ${CRB_NAME} was created by this Helm release (${RELEASE_NAME})"
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echo "Deleting old ClusterRoleBinding..."
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kubectl delete clusterrolebinding "${CRB_NAME}"
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echo "Successfully deleted old ClusterRoleBinding"
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else
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echo "WARNING: ${CRB_NAME} exists but was NOT created by this Helm release"
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echo " managed-by: ${MANAGED_BY} (expected: Helm)"
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echo " instance: ${INSTANCE} (expected: ${RELEASE_NAME})"
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echo " app: ${APP_NAME} (expected: headlamp)"
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echo "Skipping deletion to preserve user-created resource"
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fi
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resources:
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requests:
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cpu: 10m
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memory: 64Mi
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limits:
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cpu: 100m
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memory: 128Mi
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securityContext:
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allowPrivilegeEscalation: false
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runAsNonRoot: true
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capabilities:
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drop:
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- ALL
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seccompProfile:
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type: RuntimeDefault
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volumeMounts:
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- name: tmp
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mountPath: /tmp
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volumes:
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- name: tmp
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emptyDir: {}

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