Select and Sum dictionary values selecting a pattern

The Dictionary

FS:
  - nom_FS: /appm/oracle/product
    nom_LV: lv_product
    size_FS: 5
    owner_FS: oracle
    group_FS: dba
    vg_name: vgapplis

  - nom_FS: /appm/oracle/product/12.1.0.2
    nom_LV: lv_12102
    size_FS: 15
    owner_FS: oracle
    group_FS: dba
    vg_name: vgapplis

  - nom_FS: /apps/oracle/logs
    nom_LV: lvlogs
    size_FS: 5
    owner_FS: oracle
    group_FS: dba
    vg_name: vglogs

The ansible tasks

tasks:
  - name: Calculate with selectattr, map and sum
	  debug:
		  msg: "{{ FS | selectattr('vg_name', 'equalto', 'vgapplis') | map(attribute='size_FS') | list | sum }}"
	
	- name: Calculate with json_query
	  vars:
		  sum_query: "[?vg_name=='vgapplis'].size_FS | sum(@)"
		debug:
			msg: "{{ FS | json_query(sum_query) }}"

References:

¹ Use select and map with Ansible

https://serverfault.com/questions/972403/use-select-and-map-with-ansible ↩︎

Select and Sum dictionary values selecting a pattern

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