store the output of math operator

[bablu]

   - name: Set the output of the this state
     set_fact: A="{{image_avl.stdout}}"          -- this is coming from the previous registered output
     tags: avl1

   - name: Define our static value for the desired image number
     set_fact: B={{retain}}                       -- this is coming from the inventory 
     tags: num2

   - name: difference
     set_fact: C = {{A}} - {{B}}  
     tags: del1


I want to store the value of A -B in C. However, its not storing and showing blank result 

[DHAVAL JAISWAL]

solved it.

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[Dick Visser]

On 14 February 2017 at 16:12, DHAVAL JAISWAL <dhav...@gmail.com> wrote:
> solved it.

Well done!

Any chance of sharing *how* you solved it?


Thanks,

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GÉANT

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[DHAVAL JAISWAL]

 - name: Set the output of the this state
     set_fact: A="{{image_avl.stdout}}"          -- this is coming from the previous registered output
     tags: avl1

   - name: Define our static value for the desired image number
     set_fact: B={{retain}}                       -- this is coming from the inventory
     tags: num2

   - name: difference

     shell: C=`expr "{{image_avl.stdout}}" - {{retain}}`
     register: num_del 
     tags: del1
   - debug: var="num_del"

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Thanks & Regards
Dhaval Jaiswal

[Nehal J Wani]

Invoking the shell module is not necessary. One can use jinja2. An example:

$ cat a.yaml
- hosts: localhost

tasks:
- set_fact: A="5"
- set_fact: B="6"
- set_fact: C="{{ A|int - B|int }}"
- debug: var=C

$ ansible-playbook -v a.yaml
No config file found; using defaults
[WARNING]: Host file not found: /etc/ansible/hosts

[WARNING]: provided hosts list is empty, only localhost is available


PLAY [localhost]
****************************************************************************************************************************************************************************

TASK [Gathering Facts]
**********************************************************************************************************************************************************************
ok: [localhost]

TASK [set_fact]
*****************************************************************************************************************************************************************************
ok: [localhost] => {"ansible_facts": {"A": "5"}, "changed": false}

TASK [set_fact]
*****************************************************************************************************************************************************************************
ok: [localhost] => {"ansible_facts": {"B": "6"}, "changed": false}

TASK [set_fact]
*****************************************************************************************************************************************************************************
ok: [localhost] => {"ansible_facts": {"C": "-1"}, "changed": false}

TASK [debug] ********************************************************************************************************************************************************************************
ok: [localhost] => {
"C": "-1",
"changed": false
}

PLAY RECAP **********************************************************************************************************************************************************************************
localhost : ok=5 changed=0 unreachable=0 failed=0

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>
>
>
>
> --
> Thanks & Regards
> Dhaval Jaiswal
>

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>
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Nehal J Wani

[Andy Magana]

Hello from Oklahoma City,

My name is Andreas I noticed your post looking around for something about subtracting two variables but my vars are dates converted to strings but I can't seem to get the two vars to subtract I started with a bash script.

#!/bin/bash
# TO PRINT THE NUMBER OF DAYS SINCE LAST AV UPDATE
past_date=$(du -h --time testdate | grep -Eo '[[:digit:]]{4}-[[:digit:]]{2}-[[:digit:]]{2}')


# Perform a subtraction of past_date string
# from today's string divided by seconds times 12 hour days  
diff=$((($(date +%s)-$(date +%s --date "$past_date"))/(3600*24)))
echo It has been $diff days since the last AV DAT update

Any advice would be great.

Andreas Magana

Oklahoma City, OK

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