Running sub shell command in Ansible ad-hoc

Question

I would like to run a sub shell command in an ad-hoc Ansible command.

Here is what I want to do :

sudo ansible myservers -m shell -a "touch /var/tmp/$(uname -n)"

It creates the remote file but with the name of the local host, it doesn't execute the uname command on remote servers.

Answer 1

I found the solution :

sudo ansible myservers -m shell -a '/bin/bash -c "toto=`uname -n` ; touch /var/tmp/\$toto.json;"'

Seems that I have to start a shell to execute sub shell commands, but it works.