execute ansible command very slowly

[MJ]

I've installed ansible in CentOS6.5, then added host group bocai_ecs_all in /etc/ansible/ansible.cfg.
[bocai_ecs_all]
bocaiserver1
bocaiserver2 (centos7.6)
bocaiserver3
bocaiserver4 (centos7.6)
bocaiserver5
And then run the following command in shell, some machines took very long time about 60 seconds. I found those slow machines are all installed CentOS7.6.
ansible bocai_ecs_all -m ping  

what will be the cause?

Thanks in advance!

[Stefan Hornburg (Racke)]

On 9/30/20 7:47 AM, MJ wrote:
> I've installed ansible in CentOS6.5, then added host group *bocai_ecs_all* in /etc/ansible/ansible.cfg.

> [bocai_ecs_all]
> bocaiserver1
> bocaiserver2 (centos7.6)
> bocaiserver3
> bocaiserver4 (centos7.6)
> bocaiserver5
> And then run the following command in shell, some machines took very long time about 60 seconds. I found those slow
> machines are all installed CentOS7.6.

> *ansible bocai_ecs_all -m ping*  

>
> what will be the cause?

Check the DNS setup on the affected machine. It is possible that they try a reverse lookup on the IP you connect from,
but can not reach the configured DNS server.

That could be the cause.

Regards
Racke

>
> Thanks in advance!
>
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Debian and Sympa administration. Provisioning with Ansible.

[MJ]

Thanks for your reply.

I can get success ping response from  CentOS6.5(ansible is installed）on the server with CentOS7.6.   And I can also quickly logon to server(CentOS7.6) from the CentOS6.5 via ssh.