Allow passing linodeApitoken and region as secretRef

Author: tchinmai7

deploy/chart/templates/ccm-linode.yaml

@@ -1,3 +1,4 @@
+{{- if not .Values.secretRef }}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -7,3 +8,4 @@ stringData:
   apiToken: {{ required ".Values.apiToken required" .Values.apiToken }}
   region: {{ required ".Values.region required" .Values.region }}
 type: Opaque
+{{- end }}

deploy/chart/templates/daemonset.yaml

@@ -40,13 +40,13 @@ spec:
             - name: LINODE_API_TOKEN
               valueFrom:
                 secretKeyRef:
-                  name: ccm-linode
-                  key: apiToken
+                  name: {{ .Values.secretRef.name | default "ccm-linode"}}
+                  key: {{ .Values.secretRef.apiTokenRef | default "apiToken"}}
             - name: LINODE_REGION
               valueFrom:
                 secretKeyRef:
-                  name: ccm-linode
-                  key: region
+                  name: {{ .Values.secretRef.name | default "ccm-linode"}}
+                  key: {{ .Values.secretRef.regionRef | default "region"}}
             {{- toYaml .Values.env | nindent 12 }}
       volumes:
         - name: k8s

deploy/chart/values.yaml

@@ -1,9 +1,15 @@
-# apiToken [Required] - Must be a Linode APIv4 Personal Access Token with all permissions. (https://cloud.linode.com/profile/tokens)
+# apiToken [Required if secretRef is not set] - Must be a Linode APIv4 Personal Access Token with all permissions. (https://cloud.linode.com/profile/tokens)
 apiToken: ""
 
-# region [Required] - Must be a Linode region. (https://api.linode.com/v4/regions)
+# region [Required if secretRef is not set] - Must be a Linode region. (https://api.linode.com/v4/regions)
 region: ""
 
+# Set these values if your APIToken and region are already present in a k8s secret.
+# secretRef:
+#   name: "linode-ccm"
+#   apiTokenRef: "apiToken"
+#   regionRef: "region"
+
 # node-role.kubernetes.io/master - if set true, it deploys the svc on the master node
 nodeSelector:
   # The CCM will only run on a Node labelled as a master, you may want to change this