ssh connection for the hosts in dynamic inventory

[Sakshi Rathore]

hello all,

i have dynamically generated  inventory like below, i want to establish ssh conenction to all the ips for istiotst and coremediaprod servers. I have ssh keys configured in the .ssh folder: 

when i run:  ansible all -i  inventory-ccp.ini  -m ping

 i get connection 'success' only for istiotest but not for coremediaprod.

can anyone please advise me on this.

[istiotest:vars]

ansible_connection = '~/.ssh/istiotest'

ansible_user = 'user_name'

[coremediaprod:vars]

ansible_connection = '~/.ssh/coremediaprod'

ansible_user = 'user_name'

[ccpclusternodes]

 istiotest

         master-group

         user_name

                 10.32.142.184

10.32.142.185

10.32.142.186

        worker

        user_name

                 10.32.142.156

10.32.142.153

coremediaprod

         master-group

         user_name

                 10.32.31.166 

                 10.32.31.165

                 10.32.31.167

node-group

        user_name

                 10.32.31.170

                 10.32.31.168

                 10.32.31.169