Ingress: Remove resolv.conf workaround

This PS removes the resolv.conf workaround as it has not been
required for some time, now that we can set the Pod DNS policy
to "ClusterFirstWithHostNet".

Change-Id: Ibdef3357e69f1f06f3d0c0b398466d1b9d24b8ca

ingress/templates/configmap-etc.yaml

@@ -1,31 +0,0 @@
-{{/*
-Copyright 2017 The Openstack-Helm Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/}}
-
-{{- $envAll := . }}
-{{- if .Values.network.host_namespace }}
----
-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: ingress-etc
-data:
-  resolv.conf: |
-    search {{ .Release.Namespace }}.svc.{{ .Values.network.dns.kubernetes_domain }} svc.{{ .Values.network.dns.kubernetes_domain }} {{ .Values.network.dns.kubernetes_domain }}
-    {{- range .Values.network.dns.servers }}
-    nameserver {{ . | title }}
-    {{- end }}
-    options ndots:5
-{{- end }}

ingress/templates/deployment-error.yaml

@@ -25,8 +25,6 @@ spec:
 {{ tuple $envAll | include "helm-toolkit.snippets.kubernetes_upgrades_deployment" | indent 2 }}
   template:
     metadata:
-      annotations:
-        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
       labels:
 {{ tuple $envAll "ingress" "error-pages" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
     spec:

ingress/templates/deployment-ingress.yaml

@@ -35,8 +35,6 @@ spec:
       labels:
 {{ tuple $envAll "ingress" "api" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 8 }}
         app: ingress-api
-      annotations:
-        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
     spec:
 {{- if eq .Values.deployment_type "Deployment" }}
       affinity:
@@ -47,6 +45,7 @@ spec:
 {{- if .Values.network.host_namespace }}
       hostNetwork: true
 {{- end }}
+      dnsPolicy: "ClusterFirstWithHostNet"
       terminationGracePeriodSeconds: 60
       containers:
         - name: ingress-api
@@ -83,15 +82,3 @@ spec:
             - /nginx-ingress-controller
             - '--default-backend-service=$(POD_NAMESPACE)/ingress-error-pages'
             - --configmap=$(POD_NAMESPACE)/nginx-custom-configuration
-{{- if .Values.network.host_namespace }}
-          volumeMounts:
-            - name: ingress-etc
-              mountPath: /etc/resolv.conf
-              subPath: resolv.conf
-              readOnly: true
-      volumes:
-        - name: ingress-etc
-          configMap:
-            name: ingress-etc
-            defaultMode: 0444
-{{- end }}

ingress/values.yaml

@@ -66,13 +66,6 @@ labels:
 
 network:
   host_namespace: true
-  dns:
-    kubernetes_domain: cluster.local
-    # this must list the skydns server first, and in calico
-    # this is consistently 10.96.0.10
-    servers:
-    - 10.96.0.10
-    - 8.8.8.8
 
 endpoints:
   ingress: