Looking for an available port number

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1

Hi,

I am new to ansible and trying to test a playbook to check availability of a port number. If one found then use it, if not then go to the next one. Following is my playbook code,

tasks:

  • name: check port number
    become: yes
    become_user: root
    command: /bin/netstat -anp | grep “{{ item }}”
    register: result
    until: result.stdout.split()|length > 0
    with_sequence: start=5432 end=5500

Unfortunately it did not work and get me the following error.

TASK [check port number] *******************************************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: TypeError: unsupported operand type(s) for +: ‘NoneType’ and ‘int’
fatal: [pmr71dev402.auiag.corp]: FAILED! => {“failed”: true, “msg”: “Unexpected failure during module execution.”, “stdout”: “”}

Could someone please help and advise?

Also, if there is a better way to do this please feel free to advise me too.

Regards,
Andrew

2

Try using ‘shell’ instead of ‘command’ - since you are using | I think you are likely going to need shell, since | is a shell feature.

Hope this helps,

Jon

3

Hi Jon,

Thanks for your advice. I tried shell earlier and got the same error.

Please further advise if any.

Cheers,
Andrew