WHEN CONDITION

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1

I want to use the following condition in ansible playbook.

Scenario is as follows.

If arg1 > 5
follow some steps
else
endif;

IF ELSE is not possible in ansible. However, how can i achive with the WHEN condition.

2

Just add a when to the tasks you want in the ‘if’
when: arg1 > 5

for the ‘else’ just use the opposite condition.

when: arg1 <=5

3

I did create the small task. However, for defining variable (num, numami) in the same task is not working.

e.g

tasks:

  • name: Condition statement
    shell: date_string=date +%d%b%G; num=3; numami=5;
    when: $numami > $num
    echo Hi;
4

These are not valid variables for Ansible (not since 1.6). Also, setting them in a shell will not make them available.

when: $numami > $num

5

Where i can set this variable so that i can compare it in where condition.

Any small test scenario will help me to understand.

6

This should help:

http://docs.ansible.com/ansible/playbooks_variables.html

http://docs.ansible.com/ansible/set_fact_module.html

7

Tried below one. However, when condition is not correctly evaluating.

Even following condition true its executing other commands mentioned in other when condition.
current_image_state <= desire_image_state

tasks:

  • name: Get the state of the Test version
    shell: alert1=cat /tmp/test.log | grep -e "pending" -e "failed" | wc -l;
    register: image_state
    tags: image

  • name: Set the output of the Test state
    set_fact: current_image_state=image_state.stdout
    tags: Test1

  • name: Define our static value for the desired Test state
    set_fact: desire_image_state=0
    tags: Test2

  • name: Perform TASK1
    command: sh /tmp/test.sh
    when: current_image_state > desire_image_state
    tags: final

  • name: Message if couldnot able to perform TASK1
    debug: msg=“Need to check the status of Pending image”
    when: current_image_state <= desire_image_state
    tags: message

8

Tried below one. However, when condition is not correctly evaluating.

Please show the exact error message. Or the exact output, maybe with -v.

  tasks:
   - name: Get the state of the Test version
     shell: alert1=`cat /tmp/test.log | grep -e "pending" -e "failed" | wc
-l`;
     register: image_state
     tags: image

Add a debug task here (with correct indentation):
- debug: var="image_state"

     set_fact: current_image_state=image_state.stdout

I guess here is your error. You set the variable current_image_state
to a text string called "image_state.stdout". Add double curly braces
and quotes:

set_fact: current_image_state="{{ image_state.stdout }}"

   - name: Define our static value for the desired Test state
     set_fact: desire_image_state=0

I am not sure if thus sets desire_image_state to an integer or a string.

Johannes

9

Thanks !!

It works, post adding set_fact: current_image_state=“{{ image_state.stdout }}”.