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+# Motivations
+Ingress controller implementation in the ONAP cluster is based on the virtual host routing.
+Testing ONAP cluster requires a lot of entries on the target machines in the /etc/hosts.
+Adding many entries into the configuration files on testing machines is quite problematic and error prone.
+The better wait is to create central DNS server with entries for all virtual host pointed to simpledemo.onap.org and add custom DNS server as a target DNS server for testing machines and/or as external DNS for kubernetes cluster.
+
+# How to deploy test DNS server:
+Run script ./deploy\_dns.sh
+
+# How to add DNS address on testing machines:
+See post deploy info
+
+# Test DNS inside cluster (optional)
+1. You can add the following entry after DNS deploy on running cluster at the end of cluster.yaml file (rke)
+~~~yaml
+dns:
+ provider: coredns
+ upstreamnameservers:
+ - <cluster_ip>:31555
+~~~
+2. You can edit coredns configuration with command:
+ kubectl -n kube-system edit configmap coredns
+