Need help on using a variable in when condition

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1

I have a below task in my playbook. It checks the desired count of the process specified in vars.
If a task returned 50 value and since it has 0. my condition gets satisfied which is incorrect.

vars:

  • sap_process_count: “0”
    tasks:

  • name: Pre Check - Verifying app status
    shell: ps -ef | grep sap | grep -v grep | wc -l
    register: prechk_process_count
    ignore_errors: yes

  • debug:
    msg: “application is already stopped in {{ inventory_hostname }}”
    when: “sap_process_count in prechk_process_count.stdout”

I tried with the condition "prechk_process_count.stdout == “0"” . it’s working fine
my question, Is it possible to define the process count “0” through a variable in "prechk_process_count.stdout == “0"” condition.

Please advise.

2

That looks fragile. Instead of chaining a load of shell commands and hoping for the best, why don’t you use the available system utilities that are actually designed to manage starting and stopping applications?

See https://docs.ansible.com/ansible/latest/modules/systemd_module.html