feat: add pre-defined secrets to csi-driver-smb addon (#1215)

* added ability to use pre-defined secrets

* renamed variables to existing_secret_name and existing_secret_namespace

bootstrap/templates/kubernetes/apps/storage/csi-driver-smb/app/secrets.sops.yaml.j2

@@ -1,5 +1,6 @@
 #% if csi_driver_smb|default({}) and csi_driver_smb.enabled|default(false) %#
 #% for item in csi_driver_smb.storage_class %#
+#% if not item.existing_secret_name %#
 ---
 apiVersion: v1
 kind: Secret
@@ -8,5 +9,6 @@ metadata:
 stringData:
   username: "#{ item.username }#"
   password: "#{ item.password }#"
+#% endif %#
 #% endfor %#
 #% endif %#

bootstrap/templates/kubernetes/apps/storage/csi-driver-smb/app/storageclass.yaml.j2

@@ -8,8 +8,12 @@ metadata:
 provisioner: smb.csi.k8s.io
 parameters:
   source: "#{ item.source }#"
-  csi.storage.k8s.io/node-stage-secret-name: "#{ item.name }#-secret"
+  csi.storage.k8s.io/node-stage-secret-name: "#{ item.existing_secret_name|default(item.name+"-secret") }#"
+  #% if item.existing_secret_name and item.existing_secret_namespace %#
+  csi.storage.k8s.io/node-stage-secret-namespace: "#{ item.existing_secret_namespace }#"
+  #% else %#
   csi.storage.k8s.io/node-stage-secret-namespace: "storage"
+  #% endif %#
   createSubDir: "false"
 reclaimPolicy: Retain
 volumeBindingMode: Immediate

bootstrap/vars/addons.sample.yaml

@@ -48,6 +48,8 @@ csi_driver_smb:
     #   file_mode: # default 0666
     #   uid:       # default 1000
     #   gid:       # default 1000
+    #   existing_secret_name:      # If this is defined the username and password are ignored and the secret is not created
+    #   existing_secret_namespace: # default storage. Ignored if existing_secret_name is not set
     # ...
 
 # https://github.com/rancher/system-upgrade-controller