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helm: add post-delete hook that cleans up the node
This patch adds a post-delete hook to the Helm chart that runs "nfd-master --prune" in the cluster. This cleans up the node of labels, annotations, taints and extended resources that were created by NFD.
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3 changed files with 100 additions and 1 deletions
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@ -0,0 +1,94 @@
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: {{ include "node-feature-discovery.master.serviceAccountName" . }}-prune
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namespace: {{ include "node-feature-discovery.namespace" . }}
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labels:
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{{- include "node-feature-discovery.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": post-delete
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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 "node-feature-discovery.fullname" . }}-prune
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labels:
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{{- include "node-feature-discovery.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": post-delete
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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rules:
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- apiGroups:
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- ""
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resources:
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- nodes
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- nodes/status
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verbs:
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- get
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- patch
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- update
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- list
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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 "node-feature-discovery.fullname" . }}-prune
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labels:
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{{- include "node-feature-discovery.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": post-delete
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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 "node-feature-discovery.fullname" . }}-prune
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subjects:
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- kind: ServiceAccount
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name: {{ include "node-feature-discovery.fullname" . }}-prune
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namespace: {{ include "node-feature-discovery.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 "node-feature-discovery.fullname" . }}-prune
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namespace: {{ include "node-feature-discovery.namespace" . }}
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labels:
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{{- include "node-feature-discovery.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": post-delete
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"helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
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spec:
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template:
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metadata:
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labels:
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{{- include "node-feature-discovery.labels" . | nindent 8 }}
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role: prune
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spec:
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serviceAccountName: {{ include "node-feature-discovery.fullname" . }}-prune
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containers:
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- name: nfd-master
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securityContext:
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{{- toYaml .Values.master.securityContext | nindent 12 }}
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image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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command:
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- "nfd-master"
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args:
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- "-prune"
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{{- if .Values.master.instance | empty | not }}
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- "-instance={{ .Values.master.instance }}"
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{{- end }}
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restartPolicy: Never
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{{- with .Values.master.nodeSelector }}
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nodeSelector:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.master.affinity }}
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affinity:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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{{- with .Values.master.tolerations }}
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tolerations:
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{{- toYaml . | nindent 8 }}
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{{- end }}
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@ -75,7 +75,9 @@ helm uninstall node-feature-discovery --namespace $NFD_NS
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```
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The command removes all the Kubernetes components associated with the chart and
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deletes the release.
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deletes the release. It also runs a post-delete hook that cleans up the nodes
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of all labels, annotations, taints and extended resources that were created by
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NFD.
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## Chart parameters
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@ -16,6 +16,9 @@ Follow the uninstallation instructions of the deployment method used
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## Removing feature labels
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> **NOTE:** This is unnecessary when using the Helm chart for deployment as it
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> will clean up the nodes when NFD is uninstalled.
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NFD-Master has a special `-prune` command line flag for removing all
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nfd-related node labels, annotations, extended resources and taints from the
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cluster.
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