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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> |
5. You may verify the logs on core-dns master
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root@core-dns-master:~$ ll *.log
-rw-r--r-- 1 root root 12002 May 1 11:28 dnsSwitch.log
root@core-dns-master:~$
root@core-dns-master:~$ cat dnsSwitch.log
Fri Apr 27 09:16:10 EDT 2018 script called from site: 10.147.113.136
Fri Apr 27 09:16:10 EDT 2018 logging current dns entry
Server: 10.96.0.10
Address: 10.96.0.10#53
Name: sdnc.example.com
Address: 10.147.112.139
Fri Apr 27 09:16:10 EDT 2018 editing dns zone
Fri Apr 27 09:16:10 EDT 2018 verify if dns domain address exist in configuration for given app: sdnc
Fri Apr 27 09:16:10 EDT 2018 dns domain address was found
Fri Apr 27 09:16:10 EDT 2018 dns zone file edited
Fri Apr 27 09:16:10 EDT 2018 editing coredns configmap
configmap "coredns" deleted
configmap "coredns" created
Fri Apr 27 09:16:11 EDT 2018 coredns configmap edited
Fri Apr 27 09:16:11 EDT 2018 waiting for dns cache time
Fri Apr 27 09:17:01 EDT 2018 sending refresh signal for coredns configmap
Fri Apr 27 09:17:01 EDT 2018 Completed executing sdnc.dnsswitch on host: core-dns-master
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