[stable/fluent-bit] Add configmap override option (#3573)

* [stable/fluent-bit] Add configmap override option

* Rename override value to existingConfigMap

* Drop release name prefix

stable/fluent-bit/Chart.yaml

@@ -1,5 +1,5 @@
 name: fluent-bit
-version: 0.2.7
+version: 0.2.8
 appVersion: 0.12.11
 description: Fast and Lightweight Log/Data Forwarder for Linux, BSD and OSX
 keywords:

stable/fluent-bit/templates/config.yaml

@@ -1,3 +1,4 @@
+{{- if (empty .Values.existingConfigMap) -}}
 apiVersion: v1
 kind: ConfigMap
 metadata:
@@ -59,3 +60,4 @@ data:
 {{- end }}
         Format {{ .Values.backend.http.format }}
 {{- end }}
+{{- end -}}

stable/fluent-bit/templates/daemonset.yaml

@@ -51,7 +51,7 @@ spec:
           path: /var/lib/docker/containers
       - name: config
         configMap:
-          name: {{ template "fluent-bit.fullname" . }}-config
+          name: {{ if .Values.existingConfigMap }}{{ .Values.existingConfigMap }}{{- else }}{{ template "fluent-bit.fullname" . }}-config{{- end }}
 {{ if .Values.on_minikube }}
       - name: mnt
         hostPath:

stable/fluent-bit/values.yaml

@@ -29,6 +29,12 @@ backend:
 
 env: []
 
+## ConfigMap override where fullname is {{.Release.Name}}-{{.Values.existingConfigMap}}
+## Defining existingConfigMap will cause templates/config.yaml
+## to NOT generate a ConfigMap resource
+##
+existingConfigMap: ""
+
 resources:
   limits:
     memory: 100Mi