Added dedicated extraArgs parameter for namespaces

Author: azun

charts/external-dns/README.md

@@ -67,4 +67,5 @@ The following table lists the configurable parameters of the _ExternalDNS_ chart
 | `txtPrefix`                       | Prefix to create a TXT record with a name following the pattern `prefix.<CNAME record>`.                                                                                                                                                                                                                              | `""`                                   |
 | `domainFilters`                   | Limit possible target zones by domain suffixes.                                                                                                                                                                                                                                                                       | `[]`                                   |
 | `provider`                        | DNS provider where the DNS records will be created, for the available providers and how to configure them see the [README](https://github.com/kubernetes-sigs/external-dns#deploying-to-a-cluster).                                                                                                                   | `aws`                                  |
+| `watchNamespaces`                 | List of namespaces to be observed for new DNS entries.                                                                                                                                                                                                                                                                | `[]`                                   |
 | `extraArgs`                       | Extra arguments to pass to the _external-dns_ container, these are needed for provider specific arguments.                                                                                                                                                                                                            | `[]`                                   |

charts/external-dns/templates/deployment.yaml

@@ -59,6 +59,9 @@ spec:
             {{- if .Values.triggerLoopOnEvent }}
             - --events
             {{- end }}
+            {{- if .Values.watchNamespaces }}
+            - --namespace={{ .Values.watchNamespaces | join "," }}
+            {{- end }}
             {{- range .Values.sources }}
             - --source={{ . }}
             {{- end }}

charts/external-dns/values.yaml

@@ -115,4 +115,6 @@ domainFilters: []
 
 provider: aws
 
+watchNamespaces: []
+
 extraArgs: []