Scrolling through a list with sublist in Ansible - list

Question

I need to simultaneously traverse a data structure to align the values, I get this structure with the code below :
- name: Set instances
set_fact:
instance_db:
- 'db2inst1'
- 'db2inst2'
- name: Get Dialog Path
shell: db2 get dbm cfg | grep -i "Current member resolved DIAGPATH" | awk {'print $6'}
become: true
become_method: sudo
become_flags: -i
become_user: "{{ item }}"
loop: "{{ instance_db }}"
register: kud_path
- name: set_fact
set_fact:
db2_store: "[{{ instance_db | list }}] + [{{ kud_path.results|map(attribute='stdout')|list }}]"
vars:
db2_store: []
Result
{
"changed": false,
"ansible_facts": {
"db2_store": [
"db2inst1",
"db2inst2",
[
"/db2home/db2inst1/sqllib/db2dump/DIAG0000/",
"/home/db2inst2/sqllib/db2dump/DIAG0000/"
]
]
},
"_ansible_no_log": false
}
Now I need to automatically traverse these indexes where I put [*]. Because as it is, I can only access the data like this item[0][1]
- name: Creating silent config
template:
src: template.txt.j2
dest: '/tmp/template{{ item[0][*] | lower }}.txt'
mode: '0775'
loop:
- "{{ db2_store }}"
This workaround was necessary to be able to pass both values to the template
Template
################## Database connection config ##################
INSTANCE={{ item[0][*] }}
DIAGLOG_PATH={{ item[1][*] }}db2diag.log
Any suggestions on how to do this or a more elegant way to get the same result?

Answer 1

Assuming the following:
instance_db = ["db2inst1", "db2inst2"]
kud_path.results|map(attribute='stdout')|list = ["/db2home/db2inst1/sqllib/db2dump/DIAG0000/", "/home/db2inst2/sqllib/db2dump/DIAG0000/"]
Then you can use the zip filter which will pair the Nth element of the first list with the Nth element of the second list.
- debug:
msg: "{{ instance_db | zip(kud_path.results|map(attribute='stdout')|list) }}"
Outputs:
TASK [debug] ********************************************************************
ok: [localhost] => {
"msg": [
[
"db2inst1",
"/db2home/db2inst1/sqllib/db2dump/DIAG0000/"
],
[
"db2inst2",
"/home/db2inst2/sqllib/db2dump/DIAG0000/"
]
]
}
This makes it easy for you to loop over:
- name: Creating silent config
template:
src: template.txt.j2
dest: '/tmp/template{{ item[0] | lower }}.txt'
mode: '0775'
loop: "{{ instance_db | zip(kud_path.results|map(attribute='stdout')|list) }}"
################## Database connection config ##################
INSTANCE={{ item[0] }}
DIAGLOG_PATH={{ item[1] }}db2diag.log