Add user node selector for data nodes (#31)

Signed-off-by: v.oleynikov <vasily.oleynikov@flant.com>

openapi/config-values.yaml

@@ -12,3 +12,20 @@ properties:
       - TRACE
     description: Module log level
     default: DEBUG
+  dataNodes:
+    type: object
+    description: Settings for local volumes csi on nodes with data
+    default: {}
+    properties:
+      nodeSelector:
+        type: object
+        default:
+          kubernetes.io/os: linux
+        additionalProperties:
+          type: string
+        description: |
+          The same as in the Pods `spec.nodeSelector` parameter in Kubernetes.
+
+          If parameter is omitted, local volume csi will be placed on all nodes.
+
+          **Caution!** Changing this parameter does not result in data redistribution. If node with data no longer matches the `nodeSelector`, data on that node will become inaccessible.

templates/sds-local-volume-controller/secret.yaml

@@ -0,0 +1,10 @@
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: d8-{{ .Chart.Name }}-controller-config
+  namespace: d8-{{ .Chart.Name }}
+type: Opaque
+stringData:
+  config: |-
+    nodeSelector: {{ .Values.sdsLocalVolume.dataNodes.nodeSelector | toYaml | nindent 6 }}

templates/sds-local-volume-csi/controller.yaml

@@ -156,6 +156,8 @@ spec:
       {{- include "helm_lib_tolerations" (tuple . "any-node" "storage-problems") | nindent 6 }}
       {{- include "helm_lib_priority_class" (tuple . "cluster-medium") | nindent 6 }}
       {{- include "helm_lib_module_pod_security_context_run_as_user_root" . | nindent 6 }}
+      nodeSelector:
+        storage.deckhouse.io/sds-local-volume-node: ""
       affinity: {}
       containers:
       - args: