feat(atlantis): support dnsConfig.options (e.g. ndots) (#565)

The dnsConfig block only rendered `nameservers` and `searches`, silently
dropping `options` — so `ndots` (and any other resolver option) could not be
set. Render the whole `dnsConfig` value with `toYaml` so all PodDNSConfig
fields pass through, and add `options` to the values.schema.json DnsConfig
definition (which has `additionalProperties: false`, so it would otherwise
reject `options`). Also fix the schema's `searches` type to `array` (the
template ranges over it) and stop emitting an empty `nameservers:` key when
only `options`/`searches` are set.

Backward compatible: nameservers/searches render identically and an empty
`dnsConfig: {}` still renders no block.

Signed-off-by: Ilia <ilia.lazebnik@placer.ai>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: DrFaust92

charts/atlantis/Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v1
 appVersion: v0.45.0
 description: A Helm chart for Atlantis https://www.runatlantis.io
 name: atlantis
-version: 6.8.0
+version: 6.9.0
 keywords:
   - terraform
 home: https://www.runatlantis.io

charts/atlantis/templates/statefulset.yaml

@@ -50,17 +50,8 @@ spec:
       {{- fail "dnsPolicy is set to 'None', but dnsConfig is not provided" }}
       {{- end }}
       dnsConfig:
-        nameservers:
-        {{- range .Values.dnsConfig.nameservers }}
-          - {{ . }}
-        {{- end }}
-        {{- if .Values.dnsConfig.searches }}
-        searches:
-        {{- range .Values.dnsConfig.searches }}
-          - {{ . }}
-        {{- end }}
-        {{- end }}
-        {{- end }}
+        {{- toYaml .Values.dnsConfig | nindent 8 }}
+      {{- end }}
       {{- if .Values.hostAliases }}
       hostAliases:
         {{- range .Values.hostAliases }}

charts/atlantis/values.schema.json

@@ -1521,7 +1521,25 @@
         },
         "searches": {
           "description": "A list of DNS search domains for hostname lookup.",
-          "type": "string"
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "options": {
+          "description": "A list of DNS resolver options (e.g. ndots).",
+          "items": {
+            "type": "object",
+            "properties": {
+              "name": {
+                "type": "string"
+              },
+              "value": {
+                "type": "string"
+              }
+            }
+          },
+          "type": "array"
         }
       },
       "type": "object",

charts/atlantis/values.yaml

@@ -689,6 +689,9 @@ dnsConfig: {}
 #    - 8.8.8.8
 #  searches:
 #    - mydomain.com
+#  options:
+#    - name: ndots
+#      value: "3"
 
 hostNetwork: false