helm: add option to enable read affinity for CephFS

This commit adds --enable-read-affinity flag to
enable read affinity for CephFS.

Signed-off-by: Praveen M <m.praveen@ibm.com>

charts/ceph-csi-cephfs/templates/nodeplugin-clusterrole.yaml

@@ -0,0 +1,19 @@
+{{- if .Values.rbac.create -}}
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "ceph-csi-cephfs.nodeplugin.fullname" . }}
+  labels:
+    app: {{ include "ceph-csi-cephfs.name" . }}
+    chart: {{ include "ceph-csi-cephfs.chart" . }}
+    component: {{ .Values.nodeplugin.name }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    {{- with .Values.commonLabels }}{{ toYaml . | trim | nindent 4 }}{{- end }}
+rules:
+{{- if and .Values.readAffinity .Values.readAffinity.enabled }}
+  - apiGroups: [""]
+    resources: ["nodes"]
+    verbs: ["get"]
+{{- end }}
+{{- end -}}

charts/ceph-csi-cephfs/templates/nodeplugin-clusterrolebinding.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.rbac.create -}}
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "ceph-csi-cephfs.nodeplugin.fullname" . }}
+  labels:
+    app: {{ include "ceph-csi-cephfs.name" . }}
+    chart: {{ include "ceph-csi-cephfs.chart" . }}
+    component: {{ .Values.nodeplugin.name }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+    {{- with .Values.commonLabels }}{{ toYaml . | trim | nindent 4 }}{{- end }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "ceph-csi-cephfs.serviceAccountName.nodeplugin" . }}
+    namespace: {{ .Release.Namespace }}
+roleRef:
+  kind: ClusterRole
+  name: {{ include "ceph-csi-cephfs.nodeplugin.fullname" . }}
+  apiGroup: rbac.authorization.k8s.io
+{{- end -}}

charts/ceph-csi-cephfs/templates/nodeplugin-daemonset.yaml

@@ -85,6 +85,10 @@ spec:
             - "--drivername=$(DRIVER_NAME)"
 {{- if .Values.nodeplugin.profiling.enabled }}
             - "--enableprofiling={{ .Values.nodeplugin.profiling.enabled }}"
+{{- end }}
+            - "--enable-read-affinity={{ and .Values.readAffinity .Values.readAffinity.enabled }}"
+{{- if and .Values.readAffinity .Values.readAffinity.enabled }}
+            - "--crush-location-labels={{ .Values.readAffinity.crushLocationLabels | join "," }}"
 {{- end }}
           env:
             - name: POD_IP