DNS lookup issue on Ansible

[Julien Deloubes]

Hello,
i have a strange problem on Ansible 2.0, my playbook couldn't resolve anymore the fqdn of my inventory.
I can ssh to the machines in my inventory.
I tried using an inventory file or specify the hosts with the -i option.
I can run the playbook using the ip @.
I'm scratching my head about what is happening, do you have any clues?

[Julien Deloubes]

Problem disappeared but finally reappeared after a few successful runs!

I can always ssh on the impacted hosts.

Don't know where to search? Is Ansible has some sort of dns cache or something?

[J Hawkesworth]

I doubt ansible has its own dns cache. 
I forget which distro it was now but a while back i used to have to occasionally restart nscd service when I had dns problems like this.

Hope this helps,

Jon

[Julien Deloubes]

Hello,

the problem was not DNS related, it was the hostname of my machines that were too long.

He did solve the problem by adding this to my ansible.cfg:

control_path = %(directory)s/%%h-%%r

#control_path = %(directory)s/ansible-ssh-%%h-%%p-%%r

Hope this will help!