Setup required to test DnsSwitch functionality
1. Place dnsSwitch.bash on core-dns master under /home/ubuntu
2. Place sdnc.dnsswitch and site.conf on respective sites under /home/ubuntu
3. Make sure that site.conf is properly configured
e.g. as follows- siteIP="10.147.112.139" ----- IP Addresss of Site A app="sdnc" --- app name is sdnc corednsHost="10.147.114.7" ----- IP address of core-dns master
4. Following are the steps to create core-dns ssh connection with sites
a. Execute below command /home/ubuntu on coredns master (make sure to use the key name as coredns.key) :
ssh-keygen -t rsa -f coredns.key - This creates two files- coredns.key and coredns.key.pub under /home/ubuntu
b. Copy above two key files on site A and site B and execute below command.
sudo ssh-copy-id -i coredns.key root@<corednsHost>
c. verify below command works for root user without any prompts(because the key was added with root user):
ssh -i /home/ubuntu/coredns.key root@<corednsHost>