Add custom dns manifests needed to connect to infra

Signed-off-by: tssala23 <[email protected]>

custom-dns/base/configmap.yaml

@@ -0,0 +1,24 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: dns-config
+  namespace: custom-dns
+data:
+  Corefile: |
+    nerc-ocp-infra.rc.fas.harvard.edu:8053 {
+        log stdout
+        file /etc/coredns/nerc-ocp-infra.rc.fas.harvard.edu
+    }
+  nerc-ocp-infra.rc.fas.harvard.edu: |
+    $TTL    1800
+    $ORIGIN nerc-ocp-infra.rc.fas.harvard.edu.
+
+    @ IN SOA dns domains (
+        2020031101   ; serial
+        300          ; refresh
+        1800         ; retry
+        14400        ; expire
+        300 )        ; minimum
+
+    api        IN  A  10.30.9.5
+    *.apps     IN  A  10.30.9.6

custom-dns/base/deployment.yaml

@@ -0,0 +1,39 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: dns
+  labels:
+    app: dns
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: dns
+      deployment: dns
+  template:
+    metadata:
+      labels:
+        app: dns
+        deployment: dns
+    spec:
+      containers:
+      - name: coredns-openshift
+        image: quay.io/openshift/origin-coredns:4.16
+        command: ["/usr/bin/coredns"]
+        args: ["-dns.port","8053","-conf","/etc/coredns/Corefile"]
+        securityContext:
+          allowPrivilegeEscalation: false
+          seccompProfile:
+            type: RuntimeDefault
+          capabilities:
+            drop:
+            - ALL
+          runAsNonRoot: true
+        volumeMounts:
+        - mountPath: /etc/coredns
+          name: dns-config
+      volumes:
+      - configMap:
+          defaultMode: 420
+          name: dns-config
+        name: dns-config

custom-dns/base/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- namespace.yaml
+- configmap.yaml
+- dsplyment.yaml
+- Service.yaml

custom-dns/base/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: custom-dns

custom-dns/base/service.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: dns
+  name: dns
+spec:
+  ports:
+  - name: 8053-tcp
+    port: 8053
+    protocol: TCP
+    targetPort: 8053
+  - name: 8053-udp
+    port: 8053
+    protocol: UDP
+    targetPort: 8053
+  selector:
+    app: dns
+    deployment: dns