feat: support maxUnavailable config in helm chart

Author: andyzhangx

charts/README.md

@@ -112,6 +112,7 @@ The following table lists the configurable parameters of the latest Azure Blob S
 | `node.name`                                           | name of driver daemonset                  | `csi-blob-node`
 | `node.cloudConfigSecretName`                          | cloud config secret name of node driver               | `azure-cloud-provider`
 | `node.cloudConfigSecretNamespace`                     | cloud config secret namespace of node driver          | `kube-system`
+| `node.maxUnavailable`                                 | `maxUnavailable` value of driver node daemonset                            | `1`
 | `node.metricsPort`                                    | metrics port of csi-blob-node                         | `29635`                                                          |
 | `node.livenessProbe.healthPort `                      | health check port for liveness probe                   | `29633` |
 | `node.logLevel`                                       | node driver log level                                 | `5`                                                            |

charts/latest/blob-csi-driver-v1.5.0.tgz

@@ -5,6 +5,10 @@ metadata:
   namespace: {{ .Release.Namespace }}
 {{ include "blob.labels" . | indent 2 }}
 spec:
+  updateStrategy:
+    rollingUpdate:
+      maxUnavailable: {{ .Values.node.maxUnavailable }}
+    type: RollingUpdate
   selector:
     matchLabels:
       app: {{ .Values.node.name }}

charts/latest/blob-csi-driver/templates/csi-blob-node.yaml

@@ -88,6 +88,7 @@ node:
   name: csi-blob-node
   cloudConfigSecretName: azure-cloud-provider
   cloudConfigSecretNamespace: kube-system
+  maxUnavailable: 1
   metricsPort: 29635
   livenessProbe:
     healthPort: 29633

charts/latest/blob-csi-driver/values.yaml

@@ -5,6 +5,10 @@ metadata:
   name: csi-blob-node
   namespace: kube-system
 spec:
+  updateStrategy:
+    rollingUpdate:
+      maxUnavailable: 1
+    type: RollingUpdate
   selector:
     matchLabels:
       app: csi-blob-node