Unable to run top on a remote host via Ansible - ansible

Question

I have the following playbook:
---
- hosts: ESNodes
remote_user: ihazan
tasks:
- name: Run Monitoring
action: command /tmp/monitoring/cpu_mon
The content of /tmp/monitoring/cpu_mon is as follows:
top -bn1800 -p $(ps -ef | grep elasticsearch | grep -v grep | grep -v sudo | awk '{print $2}') | grep root > /tmp/cpu_stats &
Pay attention that top is run the the background with &
When running that playbook Ansible get stuck forever on the top command:
-bash-4.1$ ansible-playbook es_playbook_run.yml -l PerfSetup -K -f 10
sudo password:
PLAY [ESNodes] ****************************************************************
GATHERING FACTS ***************************************************************
ok: [isk-vsrv643]
TASK: [Run Monitoring] ********************************************************
When running it via remote SSH(which is what ansible should do) it works fine:
-bash-4.1$ ssh ihazan#isk-vsrv643 'nohup /tmp/monitoring/cpu_mon'
-bash-4.1$
Following is the debug version of the output:
-bash-4.1$ ansible-playbook es_playbook_run.yml -l PerfSetup -K -f 10 -vvvv
sudo password:
PLAY [ESNodes] ****************************************************************
GATHERING FACTS ***************************************************************
<isk-vsrv643> ESTABLISH CONNECTION FOR USER: ihazan on PORT 22 TO isk-vsrv643
<isk-vsrv643> EXEC /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-1393860499.75-256362698809430 && chmod a+rx $HOME/.ansible/tmp/ansible-1393860499.75-256362698809430 && echo $HOME/.ansible/tmp/ansible-1393860499.75-256362698809430'
<isk-vsrv643> REMOTE_MODULE setup
<isk-vsrv643> PUT /tmp/tmpZh9bYP TO /usr2/ihazan/.ansible/tmp/ansible-1393860499.75-256362698809430/setup
<isk-vsrv643> EXEC /bin/sh -c '/usr/bin/python /usr2/ihazan/.ansible/tmp/ansible-1393860499.75-256362698809430/setup; rm -rf /usr2/ihazan/.ansible/tmp/ansible-1393860499.75-256362698809430/ >/dev/null 2>&1'
ok: [isk-vsrv643]
TASK: [Run Monitoring] ********************************************************
<isk-vsrv643> ESTABLISH CONNECTION FOR USER: ihazan on PORT 22 TO isk-vsrv643
<isk-vsrv643> EXEC /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-1393860500.32-92141081389545 && chmod a+rx $HOME/.ansible/tmp/ansible-1393860500.32-92141081389545 && echo $HOME/.ansible/tmp/ansible-1393860500.32-92141081389545'
<isk-vsrv643> REMOTE_MODULE command /tmp/monitoring/cpu_mon
<isk-vsrv643> PUT /tmp/tmp7dYRPY TO /usr2/ihazan/.ansible/tmp/ansible-1393860500.32-92141081389545/command
<isk-vsrv643> EXEC /bin/sh -c '/usr/bin/python /usr2/ihazan/.ansible/tmp/ansible-1393860500.32-92141081389545/command; rm -rf /usr2/ihazan/.ansible/tmp/ansible-1393860500.32-92141081389545/ >/dev/null 2>&1'
Thx in advance

Answer 1

Use fire and forget mode, i.e. async + poll 0 :
---
- hosts: ESNodes
remote_user: ihazan
tasks:
- name: Run Monitoring
action: command /tmp/monitoring/cpu_mon
async: 45
poll: 0
Whole scoop on async is here : http://docs.ansible.com/playbooks_async.html
Good luck.